Cadmium sulfide

Cadmium sulfide
Names
	Other names cadmium(II) sulfide; greenockite; hawleyite; cadmium yellow
Identifiers
CAS Number	1306-23-6 ;
3D model (JSmol)	monomer: Interactive image; hawleyite: Interactive image; greenockite: Interactive image; greenockite: Interactive image;
ChEBI	CHEBI:50833;
ChemSpider	7969586 ;
ECHA InfoCard	100.013.771
EC Number	215-147-8;
Gmelin Reference	13655
PubChem CID	14783;
RTECS number	EV3150000;
UNII	057EZR4Z7Q ;
UN number	2570
CompTox Dashboard (EPA)	DTXSID30893280 ;
	InChI InChI=1S/Cd.S/q+2;-2 Key: FRLJSGOEGLARCA-UHFFFAOYSA-N ; InChI=1/Cd.S/q+2;-2 Key: FRLJSGOEGLARCA-UHFFFAOYAL;
	SMILES monomer: [S-2].[Cd+2]; hawleyite: [SH+2]12[CdH2-2] [SH+2]3[CdH2-2] [SH+2]([CdH-2]14)[CdH-2]1[S+2]5([CdH-2]38)[Cd-2]26[SH+2]2[CdH-2]([S+2]4)[SH+2]1[CdH2-2] [SH+2]3[CdH-2]2[S+2] [CdH-2]([SH+2]6[CdH-2]([SH+2])[SH+2]68)[SH+2]([CdH2-2]6)[CdH-2]35; greenockite: [CdH2-2]1[S+2]47[CdH-2]2[S+2] [CdH-2]3[S+2]8([CdH2-2] [SH+2]([CdH2-2]4)[CdH2-2]6)[CdH-2]4[S+2] [CdH-2]5[S+2]6([CdH2-2]6)[Cd-2]78[S+2]78[CdH-2]([SH+2]69)[SH+2]5[CdH2-2] [SH+2]4[CdH-2]7[SH+2]3[CdH2-2] [SH+2]2[CdH-2]8[SH+2]1[CdH2-2]9; greenockite: [CdH2-2]1[SH+2]([CdH2-2]6)[CdH2-2] [SH+2]7[CdH-2]2[S+2] [Cd-2]3([S+2] [CdH-2]9[S+2]5)[S+2]18[Cd-2]45[S+2] [CdH-2]5[SH+2]6[Cd-2]78[S+2]78[CdH2-2] [SH+2]5[CdH2-2] [S+2]4([CdH2-2] [SH+2]9[CdH2-2]4)[CdH-2]7[S+2]34[CdH2-2] [SH+2]2[CdH2-2]8;
Properties
Chemical formula	CdS
Molar mass	144.47 g·mol−1
Appearance	Yellow-orange to brown solid.
Density	4.826 g/cm3, solid.
Melting point	1,750 °C (3,180 °F; 2,020 K) 10 MPa
Boiling point	980 °C (1,800 °F; 1,250 K) (sublimation)
Solubility in water	insoluble
Solubility	soluble in acid ; very slightly soluble in ammonium hydroxide
Band gap	2.42 eV
Magnetic susceptibility (χ)	-50.0·10−6 cm3/mol
Refractive index (nD)	2.529
Structure
Crystal structure	Hexagonal, Cubic
Thermochemistry
Std molar; entropy (S⦵298)	65 J·mol−1·K−1
Std enthalpy of; formation (ΔfH⦵298)	−162 kJ·mol−1
Hazards
	GHS labelling:
Pictograms
Signal word	Danger
Hazard statements	H302, H341, H350, H361, H372, H413
Precautionary statements	P201, P202, P260, P264, P270, P273, P281, P301+P312, P308+P313, P314, P330, P405, P501
NFPA 704 (fire diamond)	3 0 0
Flash point	Non-flammable
	Lethal dose or concentration (LD, LC):
LD50 (median dose)	7080 mg/kg (rat, oral)
	NIOSH (US health exposure limits):
PEL (Permissible)	[1910.1027] TWA 0.005 mg/m3 (as Cd)
REL (Recommended)	Ca
IDLH (Immediate danger)	Ca [9 mg/m3 (as Cd)]
Safety data sheet (SDS)	ICSC 0404
Related compounds
Other anions	Cadmium oxide; Cadmium selenide
Other cations	Zinc sulfide; Mercury sulfide
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). verify (what is ?) Infobox references

Cadmium sulfide is the inorganic compound with the formula CdS. Cadmium sulfide is a yellow salt. It occurs in nature with two different crystal structures as the rare minerals greenockite and hawleyite, but is more prevalent as an impurity substituent in the similarly structured zinc ores sphalerite and wurtzite, which are the major economic sources of cadmium. As a compound that is easy to isolate and purify, it is the principal source of cadmium for all commercial applications. Its vivid yellow color led to its adoption as a pigment for the yellow paint "cadmium yellow" in the 18th century.

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