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THIOUREA DIOXIDE

CAS：4189-44-0
MW:108.12000
MF：CH4N2O2S

THIOUREA DIOXIDE, with the chemical formula CH4N2O2S and CAS registry number 4189-44-0, is a compound known for its versatile applications in various industries. This white crystalline solid, also referred to as Formamidine sulfinic acid, is characterized by its thiourea and dioxide functional groups. It is commonly used as a reducing agent in textile, paper, and leather industries, as well as in photographic processes. THIOUREA DIOXIDE is also utilized in hair dyeing and bleaching products due to its ability to remove unwanted color. Additionally, it finds applications in organic synthesis as a source of sulfur and as a stabilizer for hydrogen peroxide. With its wide range of uses, THIOUREA DIOXIDE plays a crucial role in numerous chemical processes and industries.

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Names and ldentifier
Properties
Use and Manufacturing
Safety and Handling
Msds
NMR Spectrum
Realated Product Infomation

1. Names and Identifiers

1.1 Name: THIOUREA DIOXIDE

1.2 Synonyms: 1-Sulfonylmethanediamine; Brn 1902754; Einecs 224-065-1; Methanediamine, 1-sulfonyl-; nitromethanethioamide; Thiourea, S,S-dioxide; Thiourea,S,S-dioxide(9CI); Urea, thio-, 2,2-dioxide; Urea,thio-,2,2-dioxide;

1.3 CAS No.: 4189-44-0

1.5 EINECS: 224-065-1; 217-157-8

1.6 Molecular Formula: CH4N2O2S

1.7 Inchi: InChI=1S/CH4N2O2S/c2-1(3)6(4)5/h(H3,2,3)(H,4,5)

1.8 InChkey: FYOWZTWVYZOZSI-UHFFFAOYSA-N

1.9 Canonical Smiles: NC(=N)S(O)=O

1.10 Isomers Smiles: O=S(=O)=C(N)N

2. Properties

2.1 Solubility: soluble (max 27 g/l)

2.2 Appearance: white powder

2.3 PH: pH(10g/l, 25℃) : 3.5～5.5

2.4 Water Solubility: soluble (max 27 g/l)

2.5 Stability: Stable at room temperature in closed containers under normal storage and handling conditions.

2.6 StorageTemp: 2-8°C

3. Use and Manufacturing

3.1 Description

Thiourea Dioxide, with the chemical formula CH4N2O2S, has the CAS number 4189-44-0. It appears as a white crystalline powder with a slight odor. The basic structure of thiourea dioxide consists of a thiourea group (CH4N2S) attached to an oxygen atom (O). This compound is soluble in water, ethanol, and acetone. Thiourea dioxide is considered to be a safe chemical to handle, but it should be used with caution and proper protective equipment. It is important to avoid inhalation, ingestion, and contact with skin or eyes. In case of contact, immediate medical attention should be sought. Thiourea dioxide may cause irritation to the respiratory system, skin, and eyes. It is also important to store thiourea dioxide in a cool and dry place, away from direct sunlight and heat sources.

Applicable Fields

Textile Industry: Thiourea dioxide is commonly used in the textile industry as a reducing agent. Its purpose in this field is to remove excess dye from fabrics and to improve color fastness. The mechanism of action involves the reduction of the dye molecules, making them more soluble and easier to remove.

Photography: Thiourea dioxide is also used in the photography industry as a fixing agent. Its purpose in this field is to remove unexposed silver halide from photographic prints and films. The mechanism of action involves the formation of soluble complexes with the silver ions, allowing them to be easily washed away.

Hair Care: Thiourea dioxide is sometimes used in hair care products, such as hair straightening creams. Its purpose in this field is to break the disulfide bonds in the hair, allowing it to be reshaped. The mechanism of action involves the reduction of the disulfide bonds, making the hair more flexible and easier to manipulate.

Storage

Conditions: Store in a cool and dry place.

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4. Safety and Handling

4.1 Sensitive: Moisture Sensitive

5. MSDS

2.Hazard identification

2.1 Classification of the substance or mixture

Self- heating substances and mixtures, Category 2

Acute toxicity - Oral, Category 4

Eye irritation, Category 2

2.2 GHS label elements, including precautionary statements

Pictogram(s)
Signal word	Warning
Hazard statement(s)	H252 Self-heating in large quantities; may catch fire H302 Harmful if swallowed H319 Causes serious eye irritation
Precautionary statement(s)
Prevention	P235 Keep cool. P280 Wear protective gloves/protective clothing/eye protection/face protection. P264 Wash ... thoroughly after handling. P270 Do not eat, drink or smoke when using this product.
Response	P301+P312 IF SWALLOWED: Call a POISON CENTER/doctor/…if you feel unwell. P330 Rinse mouth. 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.
Storage	P407 Maintain air gap between stacks or pallets. P413 Store bulk masses greater than … kg/…lbs at temperatures not exceeding …°C/…°F. P420 Store separately.
Disposal	P501 Dispose of contents/container to ...