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Platinum

CAS：7440-06-4
MW:195.078
MF：Pt

Platinum was discovered in Colombia, South America by Ulloa in 1735 and six years later in 1741 by Wood. The metal was isolated from native platinum by Delisle in 1775 and produced in malleable form by Chabaneau in 1786. Wollaston in 1803 developed a method of obtaining pure malleable platinum from crude platinum by extraction with aqua regia. The process led to the discovery of two other platinum group metals, palladium and rhodium, that were found in the aqua regia extract after platinum precipitated. Platinum derived its name from platina originating from the Spanish word plata for silver, because it was thought to be a trivial unwanted material associated with gold in gold mines of Central America.Platinum occurs in nature as a bright-white cubic crystalline solid with metallic luster associated with other noble metals of its group. Platinum also occurs as the mineral sperrylite, PtAs2, found as tin-white brittle cubic crystals containing 52−57% platinum in certain nickel-bearing deposits. Some other minerals of platinum are cooperite PtS (Pt 80-86%); and braggite(Pt, Pd, Ni)S (Pt 58-60%). The abundance of platinum in the earth’s crust is estimated to be 0.005 mg/kg. View more+

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Names and ldentifier
Properties
Use and Manufacturing
Safety and Handling
Msds
Other Information
Computational chemical data
Related Questions
Realated Product Infomation

1. Names and Identifiers

1.1 Name: Platinum

1.2 Synonyms: EINECS 231-116-1; MFCD00011179; Platin; PLATINIUM; Platinul; platinum metal; Platinum1; Platinum3;

1.3 CAS No.: 7440-06-4

1.4 CID: 23939

1.5 EINECS: 231-116-1

1.6 Molecular Formula: Pt

1.7 Inchi: InChI=1S/Pt

1.8 InChkey: BASFCYQUMIYNBI-UHFFFAOYSA-N

1.9 Canonical Smiles: [Pt]

1.10 Isomers Smiles: [Pt]

2. Properties

2.1 Solubility: Soluble in hot aqua regia.

2.2 Appearance: silvery-grey metal

2.3 Storage: Ambient temperatures.

2.4 Chemical Properties: Platinum is a silvery to whitish-gray metal, that is malleable and ductile (Weast, 1988; Krebs, 2006). It is estimated that the average platinum concentration in the earth’s lithosphere ranges from 0.001 to 0.005 mg/kg (WHO, 1991). It has a vapor pressure of approximately 0mmHg (NIOSH, 2005). Platinum, depending on mining location, is found in sperrylite, cooperite, braggite, and copper–nickel sulfide ores, and in alloys with other members of the platinum group elements (PGE; iridium, osmium, palladium, ruthenium, and rhodium) (Dubiella-Jackowska et al., 2009; Weast, 1988; WHO, 1991). Both elemental platinum and platinum salts are used in industry. Elemental platinum is insoluble in water whereas many of the platinum salts are water soluble to varying degrees, depending on their specific chemical properties (WHO, 1991). Platinum metal is inert and resists corrosion (Krebs, 2006). However, platinum halide salts are considered potent allergens that have a high risk of causing sensitization (Linnett, 2005). Platinum bonds with halogens in its +2 and +4 oxidation state (Krebs, 2006). The charge of the salt and the presence and number of halides, especially chloride, in a complex platinum salt may affect the degree of mammalian sensitivity to a specific salt (Cleare et al., 1976; Mapp et al., 1999; Merget et al., 2000; Ravindra et al., 2004; Pepys, 1980).

Pictogram(s)	No symbol.
Signal word	No signal word.
Hazard statement(s)	none
Precautionary statement(s)
Prevention	none
Response	none
Storage	none
Disposal	none

Platinum

2.Hazard identification

2.1 Classification of the substance or mixture

2.2 GHS label elements, including precautionary statements

2.3 Other hazards which do not result in classification