Sign in|Join Free
About Us
Encyclopedia   /  Other Inorganic Salts  /  Pharmaceutical Intermediates  /  Organic Intermediates
Potassium chromate structure

Potassium chromate
Potassium chromate (CAS 7789-00-6) is a compound with the chemical formula K2CrO4. It is a yellow crystalline solid that is highly soluble in water. Potassium chromate is commonly used as a source of the chromate ion in various chemical reactions and industrial processes. It is also used as a corrosion inhibitor and as a coloring agent in ceramics. Potassium chromate is known to be toxic and can cause severe irritation to the skin, eyes, and respiratory system. It is important to handle this compound with caution and follow proper safety protocols when working with it.
View more+
  Email   Tweet   Share
 
 
1. Names and Identifiers
1.1 Name
Potassium chromate
1.2 Synonyms
CHROMIUM(VI) ATOMIC SPECTR. STD. CONC. 1 .00 G CR(VI), AMP.; CHROMIUM(VI) ATOMIC SPECTROSCOPY STANDA&; dipotassiumchromate(k2cro4); dipotassiummonochromate; EINECS 232-140-5; MFCD00011368; neutralpotassiumchromate; POTASSIUM CHROMATE ACS REAGENT; potassiumchromate[k2(cro4)]; potassiumchromate6;
1.3 CAS No.
7789-00-6
1.4 CID
24597
1.5 EINECS
232-140-5
1.6 Molecular Formula
CrK2O4
1.7 Inchi
InChI=1S/Cr.2K.4O/q;2*+1;;;2*-1
1.8 InChkey
XMXNVYPJWBTAHN-UHFFFAOYSA-N
1.9 Canonical Smiles
[O-][Cr](=O)(=O)[O-].[K+].[K+]
1.10 Isomers Smiles
[O-][Cr](=O)(=O)[O-].[K+].[K+]
2. Properties
2.1 Vapour pressure
6.7 (vs air)
2.2 Solubility
H2O: soluble
2.3 VaporDensity
6.7 (vs air)
2.4 Appearance
lemon-yellow crystals
2.5 Storage
Ambient temperatures.
2.6 Chemical Properties
Lemon yellow orthorhombic crystal; Soluble in water; insoluble in alcohol
2.7 Color/Form
Yellow
2.8 Corrosivity
Corrosive
2.9 Decomposition
When heated to decomposition it emits toxic fumes of /potassium oxide/.
2.10 Odor
Odorless
2.11 PH
Aqueous solution is alkaline to litmus or phenolphthalein;
2.12 Physical
Potassium chromate; is a yellow crystalline solid. It is soluble in water;. The primary hazard is the threat to the environment. Immediate steps should be taken to limit its spread to the environment. It is used in chemical analysis, in making pigments for paints and inks, as a fungicide, and to make other chromium; compounds.
View all
2.13 Water Solubility
640 g/L (20 oC)
2.14 Spectral Properties
INDEX OF REFRACTION: BETA 1.74
2.15 Stability
Stable. Strong oxidizing agent - contact with combustible materials may lead to fire or violent reaction. Incompatible with strong reducing agents, combustible materials.
2.16 StorageTemp
Store below +30°C.
2.17 Toxicity Summary
IDENTIFICATION AND USE: Potassium chromate; forms lemon-yellow crystals. It has a limited application in enamels, finishing leather, and rustproofing of metals. Oxidizing agent in analytical chemistry. HUMAN EXPOSURE AND TOXICITY: If ingested, violent gastroenteritis, severe circulatory collapse and toxic nephritis may ensue, or peripheral vascular shock. Eye contact can cause severe damage with possible loss of vision. Evaluation of genotoxic effects of potassium chromate; (K2CrO4) and was carried out in human blood lymphocytes in vitro as measured by the electron microscopy in situ end-labeling (EM-ISEL). EM-ISEL was used to assess DNA single-strand breaks (SSBs) expressed as number of immunogold particles per sq um of chromatin at both chromosomal and nuclear DNA levels. Quantification of SSBs by EM-ISEL showed that potassium chromate; is genotoxic agent at non-cytotoxic concentrations. Potassium chromate; quadrupled frequency of sister-chromatid exchanges in cultured human fibroblasts. Potassium chromate; induced DNA damage and unscheduled DNA synthesis in cultured human fibroblasts. ANIMAL STUDIES: The embryotoxic and teratogenic potential of potassium chromate; was evaluated by the teratological analysis of mouse fetuses. The test chemical was administered intraperitoneally to mice of both sexes for 30 days. Teratological scanning of the fetuses born to treated animals revealed a reduction in the number of live implants and litter size. Higher incidence of resorption and dead litter indicated the embryotoxic effect of the test chemical. Malformations, both skeletal and morphological, suggest the possibility of potassium chromate; being fetotoxic. Potassium chromate; induced significant and dose-related increase in micronucleated polychromatic erythrocytes (micronuclei) in bone marrow of mice following 2 ip injections of doses ranging from 12-48 mg/kg body wt. Potassium chromate; was tested for its potential to induce forward mutations at the thymidine; kinase locus in L5178Y mouse lymphoma cells. Strong positive responses at survivals greater than 10% were observed. ECOTOXICITY STUDIES: 90 Days after hatching, young carp were reared for 75 wk in test waters of pH 7 & 5 containing 0.1 ppm potassium chromate;. This pollutant caused deformation in the bone by chronic leaching of calcium;, and the low pH hastened the leaching.
View all
3. Use and Manufacturing
3.1 Definition
ChEBI: A potassium salt consisting of potassium and chromate ions in a 2:1 ratio.
3.2 Description

Potassium chromate, with the chemical formula K2CrO4, has the CAS number 7789-00-6. It appears as bright yellow crystals or powder with no odor. The basic structure of potassium chromate consists of two potassium ions (K+) and one chromate ion (CrO4^2-) attached together. This compound is highly soluble in water. Potassium chromate is a strong oxidizing agent and can react violently with combustible materials. It may cause irritation to the skin, eyes, and respiratory system. Ingestion or inhalation of potassium chromate can lead to severe health effects. It is important to handle this chemical with caution and use appropriate protective measures.

Applicable Fields

Analytical Chemistry: Potassium chromate is commonly used as an indicator in various analytical chemistry techniques. Its purpose in this field involves its ability to change color depending on the pH of the solution. The mechanism of action in analytical chemistry is based on the formation of different chromate species that exhibit distinct colors.

Dyeing and Printing: This compound is used in dyeing and printing processes. Potassium chromate acts as a mordant, helping to fix dyes to fabrics or other materials. The mechanism of action in dyeing and printing involves the formation of insoluble complexes between potassium chromate and the dye molecules, resulting in enhanced color fastness.

Storage

Conditions: Store in a cool and dry place.

View all
3.3 General Description
Potassium chromate is a yellow crystalline solid. Potassium chromate is soluble in water. The primary hazard is the threat to the environment. Immediate steps should be taken to limit its spread to the environment. Potassium chromate is used in chemical analysis, in making pigments for paints and inks, as a fungicide, and to make other chromium compounds.
View all
3.4 GHS Classification
Signal: Danger
GHS Hazard Statements
H315: Causes skin irritation [Warning Skin corrosion/irritation]
H317: May cause an allergic skin reaction [Warning Sensitization, Skin]
H319: Causes serious eye irritation [Warning Serious eye damage/eye irritation]
H335: May cause respiratory irritation [Warning Specific target organ toxicity, single exposure; Respiratory tract irritation]
H340: May cause genetic defects [Danger Germ cell mutagenicity]
H350i: May cause cancer by inhalation [Danger Carcinogenicity]
H400: Very toxic to aquatic life [Warning Hazardous to the aquatic environment, acute hazard]
H410: Very toxic to aquatic life with long lasting effects [Warning Hazardous to the aquatic environment, long-term hazard]

Precautionary Statement Codes
P201, P202, P261, P264, P271, P272, P273, P280, P281, P302+P352, P304+P340, P305+P351+P338, P308+P313, P312, P321, P332+P313, P333+P313, P337+P313, P362, P363, P391, P403+P233, P405, and P501
View all
3.5 Methods of Manufacturing
Roasting powdered chromite with potash; and limestone, treating the cinder with hot potassium sulfate; solution, and leaching.
3.6 Potential Exposure
Potassium chromate is used in printing: photomechanical processing; chrome-pigment production; and wool preservative methods; to make dyes, pigments, inks and enamels; as an oxidizing agent; analytical reagent; in electroplating; explosives.
3.7 Purification Methods
Crystallise it from conductivity water (0.6g/mL at 20o), and dry it between 135o and 170o.
3.8 Shipping
UN1479 Oxidizing solid, n.o.s., Hazard Class: 5.1; Labels: 5.1-Oxidizer, Technical Name Required. UN3288 Toxic solids, inorganic, n.o.s., Hazard Class: 6.1; Labels: 6.1-Poisonous materials, Technical Name Required
4. Safety and Handling
4.1 Fire Hazard
Behavior in Fire: May increase intensity of fire if in contact with combustible materials. Cool containers and spilled material with plenty of water.
4.2 Other Preventative Measures
If material not involved in fire: Keep material out of water sources and sewers. Build dikes to contain flow as necessary.
Personnel protection: Keep upwind. ... Avoid breathing vapors or dusts. Wash away any material which may have contacted the body with copious amounts of water or soap and water.
SRP: Contaminated protective clothing should be segregated in such a manner so that there is no direct personal contact by personnel who handle, dispose, or clean the clothing. Quality assurance to ascertain the completeness of the cleaning procedures should be implemented before the decontaminated protective clothing is returned for reuse by the workers. Contaminated clothing should not be taken home at end of shift, but should remain at employee's place of work for cleaning.
View all
4.3 Cleanup Methods
Environmental considerations: Land Spill: Dig a pit, pond, lagoon, or holding area to contain liquid or solid material. /SRP: If time permits, pits, ponds, lagoons, soak holes, or holding areas should be sealed with an impermeable flexible membrane liner./ Cover solids with a plastic sheet to prevent dissolving in rain or fire fighting water.
Environmental considerations: Water Spill: Add sodium bisulfite. Neutralize with agricultural lime (slaked lime), crushed limestone, or sodium bicarbonate. Adjust pH to neutral (pH7).
View all
4.4 DisposalMethods
SRP: At the time of review, criteria for land treatment or burial (sanitary landfill) disposal practices are subject to significant revision. Prior to implementing land disposal of waste residue (including waste sludge), consult with environmental regulatory agencies for guidance on acceptable disposal practices.
View all
4.5 Fire Fighting Procedures
If material involved in fire: Extinguish fire using agent suitable for type of surrounding fire. (Material itself does not burn or burns with difficulty.)
Respiratory protection from chromic acid and chromates while fighting fires: Self-contained breathing apparatus with a full facepiece operated in pressure-demand or other positive pressure mode.
View all
4.6 FirePotential
May incr intensity of fire if in contact with combustible materials.
Non-combustible
4.7 Safety Profile
Confirmed carcinogenwith experimental tumorigenic data. Poisonby ingestion, intravenous, subcutaneous, andintramuscular routes. An experimentalteratogen. Other experimental reproductiveeffects. Human mutation data reported. Apowerful oxidizer. When heated todecomposition it emits toxic fumes of K2O.Used as a mordant for wool, in the oxidizingand treatment of dyes on materials. See alsoCHROMIUM COMPOUNDS.
View all
4.8 Formulations/Preparations
USEPA/OPP Pesticide Code 068301; Trade Names: Kromad, component of (with 012903 and 078901).
FORMERLY AN INGREDIENT OF KROMA-CLOR & ULTRA-CHLOR.
SEE KROMAD. KROMAD: CADMIUM SEBACATE, 5%; POTASSIUM CHROMATE, 5%; THIRAM, 16%. /KROMAD/
Grades or Purity: Reagent, 99%; CP; Technical.
NATURAL TARAPACAITE
View all
4.9 Incompatibilities
A powerful oxidizer. Violent reactions with combustibles, organics, powdered metals; or easily oxidizable substances. Contact with hydroxylamine, hydrazine causes explosion. Potassium chromate Preparation Products And Raw materials Preparation Products
View all
4.10 Reactivities and Incompatibilities
A powerful oxidizer.
4.11 Safety

Hazard Codes:?ToxicT,?DangerousN, OxidizingO
H T: Toxic.
H N: Dangerous for theenvironment.
H O: Oxidizing.
Risk Statements: 49-46-43-51/53-8-50/53-36/37/38-22-45-52/53
R 49: May cause cancer by inhalation.
R 46: May cause heritable genetic damage.
R 43: May cause sensitization by skin conta.
R 51/53: Toxic to aquatic organisms, may cause long-term adverse effects in the aquatic environment.
R 8: Contact with combustible material may cause fir.
R 50/53: Very Toxic to aquatic organisms, may cause long-term adverse effects in the aquatic environment.
R 36/37/38: Irritating to eyes, respiratory system and skin.
R 22: Harmful if swallowed.
R 45: May cause cancer.
R 52/53: Harmful to aquatic organisms, may cause long-term adverse effects in the aquatic environment.
Safety Statements: 53-45-60-61-36/37-26
S 53: Avoid exposure - obtain special instruction before use.
S 45: In case of accident or if you feel unwell, seek medical advice immediately (show label where possible).
S 60: This material and/or its container must be disposed of as hazardous waste.
S 61: Avoid release to the environment. Refer to special instructions safety data sheet.
S 36/37: Wear suitable protective clothing and gloves.
S 26: In case of contact with eyes, rinse immediately with plenty of water and seek medical advice.
RIDADR: UN 3288 6.1/PG 3
WGK Germany: 3
RTECS GB2940000
HazardClass: 5.1
PackingGroup: III

View all
4.12 Toxicity

RTECS: GB2940000
LD50/LC50: Oral, mouse: LD50 = 180 mg/kg.
Carcinogenicity: Potassium chromate - California: carcinogen, initial date 2/27/87 (Chromium (VI) compounds). NTP: Known carcinogen (Chromium (VI) compounds). IARC: Group 1 carcinogen (Chromium (VI) compounds).
Other: See actual entry in RTECS for complete information. Mutagenicity: Ames-test: positive. Mutagen.

View all
5. MSDS

2.Hazard identification

2.1 Classification of the substance or mixture

Skin irritation, Category 2

Eye irritation, Category 2

Skin sensitization, Category 1

Specific target organ toxicity \u2013 single exposure, Category 3

Germ cell mutagenicity, Category 1B

Hazardous to the aquatic environment, short-term (Acute) - Category Acute 1

Hazardous to the aquatic environment, long-term (Chronic) - Category Chronic 1

Carcinogenicity, Category 1B

2.2 GHS label elements, including precautionary statements

Pictogram(s)
Signal word

Danger

Hazard statement(s)

H315 Causes skin irritation

H319 Causes serious eye irritation

H317 May cause an allergic skin reaction

H335 May cause respiratory irritation

H340 May cause genetic defects

H410 Very toxic to aquatic life with long lasting effects

H350i

Precautionary statement(s)
Prevention

P264 Wash ... thoroughly after handling.

P280 Wear protective gloves/protective clothing/eye protection/face protection.

P261 Avoid breathing dust/fume/gas/mist/vapours/spray.

P272 Contaminated work clothing should not be allowed out of the workplace.

P271 Use only outdoors or in a well-ventilated area.

P201 Obtain special instructions before use.

P202 Do not handle until all safety precautions have been read and understood.

P273 Avoid release to the environment.

Response

P302+P352 IF ON SKIN: Wash with plenty of water/...

P321 Specific treatment (see ... on this label).

P332+P313 If skin irritation occurs: Get medical advice/attention.

P362+P364 Take off contaminated clothing and wash it before reuse.

P305+P351+P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.

P337+P313 If eye irritation persists: Get medical advice/attention.

P333+P313 If skin irritation or rash occurs: Get medical advice/attention.

P304+P340 IF INHALED: Remove person to fresh air and keep comfortable for breathing.

P312 Call a POISON CENTER/doctor/\u2026if you feel unwell.

P308+P313 IF exposed or concerned: Get medical advice/ attention.

P391 Collect spillage.

Storage

P403+P233 Store in a well-ventilated place. Keep container tightly closed.

P405 Store locked up.

Disposal

P501 Dispose of contents/container to ...

2.3 Other hazards which do not result in classification

none

View all
6. NMR Spectrum
IR : KBr disc  
IR : nujol mull  
7. Computed Properties
8.Other Information
Usage
In finishing of leather, rust proofing of metals, textile mordant, as an analytical lab reagent. Potassium chromate enjoys a broad assortment of industrial purposes. In the fabric industry, manufacturers use potassium chromate to tan leather and dye clothing items and materials. In science, potassium chromate is often used as an indicator, meaning it can identify the presence, location and quantity of certain elements such as iron. Beyond these applications, potassium chromate also functions as an oxidizing agent in manufacturing and scientific experiments. Some nuclear power plants currently use substances other than potassium chromate to inhibit corrosion in closed cooling-water systems. Potassium chromate is applied as a chemical indicator of chlorine ions.
View all
Merck
14,7622
Inorganic compound
Potassium chromate, commonly known as tarapacaite, is an inorganic compound, which is yellow orthorhombic or hexagonal crystal at room temperature. The relative density is 2.732, and the melting point is 968 °C. It is toxic and can disolve in water to form alkaline chromate ion hydrolysis solution. And it is insoluble in alcohol and ether. After added acid, the yellow solution of potassium chromate will turn orange, which is the color of dichromate. There is an equilibrium between the conversion of chromate and dichromate in the solution:
When the acid is added to the potassium chromate solution, the equilibrium will shift toward the direction of generating potassium dichromate, and when the alkali is added to the potassium dichromate solution, the equilibrium will shift to the direction of generating potassium chromate. Potassium chromate has oxidative properties, and it can react with the reducing agent in alkaline medium to form Cr(OH)4-(namely CrO?2-). Adding different solutions respectively containing barium ion, lead ion and silver ion to the potassium chromate solution will form the corresponding insoluble chromate: barium chromate BaCrO4 (yellow), lead chromate pbCrO4 (yellow), silver chromate Ag2CrO4(Brick red). And the presence of chromate ions can be demonstrated by the characteristic color of these insoluble chromates. Potassium chromate can be used as analytical reagent, oxidant, mordant, metal rust inhibitor, and used for barium and silver trace analysis. It can also be used as raw materials of tanning and medicine industry and other chromium compounds. Chromite Fe(CrO2)2 powder can be used as raw material and calcined with potassium hydroxide, limestone (dolomite) in the air, and then extracted with potassium sulfate solution to obtain potassium chromate.
View all
Potassium chromate indicator method
Potassium chromate indicator method, also known as Moore (Mohr), is a precipitation titration method (silver method) that uses potassium chromate (K2CrO4) as indicator and silver nitrate (AgNO3) as the standard solution. This method is mainly used for the determination of chlorine Ion (Cl-) or bromide ion (Br-). Add a small amount of K2CrO4 as indicator before stating determination, and then titrate with AgNO3 standard solution. After the start of the titration, the precipitate of white (silver chloride) or pale yellow (silver bromide) precipitates first. When Cl-or Br-precipitates quantitatively, a little excess silver nitrate solution will cause the concentration of Ag+ suddenly increasing to immediately generate brick red silver chromate (Ag2CrO4) precipitation, indicating the titration endpoint. The amount of indicator and the acidity of the solution are two major problems of this titration method. If the K2CrO4 concentration is too high, the color of the titration solution will be too deep to hinder the observation of Ag2CrO4 precipitation color in the end; if the K2CrO4 concentration is too low, an excessively considerable amount of silver nitrate solution will be needed after the quantitative precipitation of silver halide to generate silver chromate precipitation to instruct the titration end point, which will results the titration error increasing. When the 0.1mol/l AgNO3 solution is used to titrate the 0.1mol/l halide, if the concentration of K2CrO4 is 5× 10-3mol/l, the end point error is only +0.06%, which can be thought that the accuracy of the analysis result is not affected. K2CrO4 indicator method can not be carried out in acidic or alkaline solution, because K2CrO4 will be converted to potassium dichromate (K2Cr2O7) at a small pH value, and Ag+ will precipitate in the form of silver oxide (Ag2O) when the pH is too high. Commonly, the suitable acidity range is pH = 6.5~ 10.5, but when there are ammonium salts in solution, the solution acidity pH = 6.5~7.2 is appropriate.
The potassium chromate indicator method can only be used for the direct titration of Cl-or Br-ions, and the titration result is their total when coexisting. This method is not suitable for the determination of iodide ion (I-) or thiocyanate ion (SCN-), because they are too easily absorbed by sedimentation and the end point is unclear. This method is also not suitable for titrating Ag+ with Cl-, but Ag+ can be determined using the back titration, namely add an excessive amount of NaCl standard solution in the test solution, and then use AgNO3 standard solution to titrate excess Cl-ions. In the solution, all the cations that can form precipitates with CrO2-4 or the anions that can precipitate with Ag+ will interfere with the determination. Potassium chromate indicator method is mainly used for the determination of the Cl-ions in very dilute solution, such as the determination of Cl-in drinking water and industrial products impurities.
View all
Potassium dichromate
Potassium dichromate, also known as red alum potassium, is orange-red triclinic crystal or needle-like crystal. The density is 2.676 g/cm3. The melting temperature is 398 °C. It is soluble in water and insoluble in ethanol. It has strong oxidizing property and decomposes at 1300 °C.
In production, potassium dichromate is always used to introduce chromium to make the enamel colored when melting. It is the coloring agent of colored titanium milk yellow glaze and titanium yellow glaze, and the used dosage is generally 0.06%~0.12%. Potassium dichromate and copper oxide can also be mix-used to obtain green, bamboo green, fruit green and other color glaze. However, these colored glazes are generally less glossy due to the influence of chromate.
The color glaze obtained from chromium oxide or potassium (sodium) dichromate often is yellow-green due to the valence change of chromium ions in the melting process. Potassium dichromate is also commonly used to make various green pigments and pink pigments.
Potassium dichromate should meet the required targets: potassium dichromate content ≥ 99%, chloride (Cl) content ≤ 0.08%, water insoluble ≤ 0.05%.
View all
Solubility in water (g/100ml)
Dissolved grams per 100 ml of water at different temperatures (°C):
60 g/10 °C; 63.7 g/20 °C; 66.7 g/30 °C; 67.8 g/40 °C
70.1 g/60 °C; 74.5 g/90 °C
Toxicity
See sodium chromate
Chemical properties
Lemon yellow orthorhombic crystal; Soluble in water; insoluble in alcohol
Application
Used as analytical reagent, oxidant, mordant and metal rust inhibitor;used for the manufacture of chromate,used as oxidant and mordant of printing and dyeing. Used for ink, paint, enamel, metal corrosion and so on,mainly used in the manufacture of chemical reagents and pigments.
Preparation
Neutralization method: Dissolve potassium dichromate in the mother liquor and water, and then add the mixture to the reactor. Next add potassium hydroxide under stirring to carry out neutralization reaction. The produced potassium chromate is weakly alkaline, and then evaporated for concentration, cooled for crystallization, separated and dried to obtain the finished potassium chromate products.
K2Cr2O7 + 2KOH → 2K2CrO4 + H2O
The separated mother liquor will be returned to the dissolving step for dissolving potassium dichromate.
View all
Chemical Properties
lemon-yellow crystals
Chemical Properties
Potassium chromate(VI) is a yellow crystalline solid.
Uses
Potassium chromate (K2CrO4) is soluble in water and is used to make bright yellow inks and paint pigments. It is also used as a reagent in chemical laboratories and as a mordant to “fix” dyes in colored textiles.
Uses
It is used as an oxidizing agent.
Uses
Has a limited application in enamels, finishing leather, rustproofing of metals, being replaced by the sodium salt; as reagent in analytical chemistry.
Definition
ChEBI: A potassium salt consisting of potassium and chromate ions in a 2:1 ratio.
Definition
A salt containing the ionCrO42-.
Definition
potassium chromate: A bright yellowcrystalline solid, K2CrO4, solublein water and insoluble in alcohol;rhombic; r.d. 2.73; m.p. 968.3°C; decomposes without boiling. It is producedindustrially by roasting powderedchromite ore with potassiumhydroxide and limestone and leachingthe resulting cinder with hotpotassium sulphate solution. Potassiumchromate is used in leatherfinishing, as a textile mordant, and inenamels and pigments. In the laboratoryit is used as an analyticalreagent and as an indicator. Likeother chromium(III) compounds it istoxic when ingested or inhaled.
View all
General Description
Potassium chromate is a yellow crystalline solid. Potassium chromate is soluble in water. The primary hazard is the threat to the environment. Immediate steps should be taken to limit its spread to the environment. Potassium chromate is used in chemical analysis, in making pigments for paints and inks, as a fungicide, and to make other chromium compounds.
View all
Air & Water Reactions
Soluble in water.
Reactivity Profile
Oxidizing agents, such as Potassium chromate , can react with reducing agents to generate heat and products that may be gaseous (causing pressurization of closed containers). The products may themselves be capable of further reactions (such as combustion in the air). The chemical reduction of materials in this group can be rapid or even explosive, but often requires initiation (heat, spark, catalyst, addition of a solvent). Explosive mixtures of inorganic oxidizing agents with reducing agents often persist unchanged for long periods if initiation is prevented. Such systems are typically mixtures of solids, but may involve any combination of physical states. Some inorganic oxidizing agents are salts of metals that are soluble in water; dissolution dilutes but does not nullify the oxidizing power of such materials. Organic compounds, in general, have some reducing power and can in principle react with compounds in this class. Actual reactivity varies greatly with the identity of the organic compound. Inorganic oxidizing agents can react violently with active metals, cyanides, esters, and thiocyanates.
View all
Hazard
Toxic by ingestion and inhalation.
Health Hazard
Inhalation causes local irritation of mucous membranes; continuing nose irritation can result in perforation of nasal septum. Ingestion may cause violent gastroenteritis, circulatory collapse, vertigo, coma, and toxic nephritis; ingestion of excessive quantities can be fatal. Contact with eyes causes severe irritation and conjunctivitis. Repeated or prolonged exposure to dust, mist, or solutions may cause dermatitis; contact with breaks in the skin may cause ``chrome sores'' appearing as slow-healing, hard-rimmed ulcers which leave the area vulnerable to infection.
View all
Fire Hazard
Behavior in Fire: May increase intensity of fire if in contact with combustible materials. Cool containers and spilled material with plenty of water.
Safety Profile
Confirmed carcinogen with experimental tumorigenic data. Poison by ingestion, intravenous, subcutaneous, and intramuscular routes. An experimental teratogen. Other experimental reproductive effects. Human mutation data reported. A powerful oxidizer. When heated to decomposition it emits toxic fumes of K2O. Used as a mordant for wool, in the oxidizing and treatment of dyes on materials. See also CHROMIUM COMPOUNDS.
View all
Potential Exposure
Potassium chromate is used in printing: photomechanical processing; chrome-pigment production; and wool preservative methods; to make dyes, pigments, inks and enamels; as an oxidizing agent; analytical reagent; in electroplating; explosives.
Shipping
UN1479 Oxidizing solid, n.o.s., Hazard Class: 5.1; Labels: 5.1-Oxidizer, Technical Name Required. UN3288 Toxic solids, inorganic, n.o.s., Hazard Class: 6.1; Labels: 6.1-Poisonous materials, Technical Name Required
Purification Methods
Crystallise it from conductivity water (0.6g/mL at 20o), and dry it between 135o and 170o.
Incompatibilities
A powerful oxidizer. Violent reactions with combustibles, organics, powdered metals; or easily oxidizable substances. Contact with hydroxylamine, hydrazine causes explosion.
9. Toltal 51 Suppliers View more
Factory Supply Potassium chromate
Amitychem Corporation
 1YR   China
Tel: Update Time:2023/06/28
inquire
Potassium chromate
Dayang Chem (Hangzhou) Co., Ltd.
 1YR   China
Tel: Update Time:2024/06/17
inquire
Potassium chromate
MOSINTER GROUP LIMITED
  China
Tel: Update Time:2019/01/14
inquire
Potassium chromate
Hangzhou J&H Chemical Co., Ltd.
  China
Tel: Update Time:2019/02/25
inquire
Chromic acid (H2CrO4),potassium salt (1:2)
Jinan Shiji Tongda Chemical Industry Co;Ltd.
  China
Tel: Update Time:2012/10/11
inquire
10. Related Questions
Is Potassium Chromate a Dangerous Chemical?Potassium chromate (chemical formula: K2CrO4) is a yellow solid, which is the potassium salt of chromic acid. Chromium in Potassium chromate is hexavalent and is classified as a Group 2 carcinogen, in..
What factors affect the relative molecular mass of Potassium Chromate?Potassium Chromate is a commonly used inorganic compound with a wide range of applications. It is widely used as an oxidizing agent, catalyst, and preservative in chemical research and industrial prod..
What are the properties, applications, and safety issues of acidic heavy Potassium chromate?Acidic heavy Potassium chromate, with a chemical formula of K2Cr2O7, is an important inorganic chemical substance. It is a deep red solid powder that is soluble in water and ethanol, but insoluble in ..
What is the molar mass of Potassium chromate?Potassium chromate, with the chemical formula K2Cr2O7, is an important inorganic compound. It is an orange crystalline solid that can dissolve in water and is used as an oxidizing agent and catalyst. ..
11. Realated Product Infomation
 
1. Names and Identifiers
2. Properties
3. Use and Manufacturing
4. Safety and Handling
5. Msds
6. NMR Spectrum
7. Computational chemical data
8. Other Information
9. Toltal 51 Suppliers
10. Related Questions
11. Realated Product Infomation
 
 
Cancel
 
CAS Products Suppliers
Popular Searches
Request For Quotation