Chrome orange

Chrome orange
Names
	Other names Basic chromium lead oxide; Chromium dilead pentaoxide; Chromium lead oxide; Dilead chromate oxide; Lead chromate oxide; Lead chromate(VI) oxide;
Identifiers
CAS Number	18454-12-1;
3D model (JSmol)	Interactive image;
ChemSpider	27052;
ECHA InfoCard	100.038.476
EC Number	242-339-9;
PubChem CID	29078;
CompTox Dashboard (EPA)	DTXSID90897143 ;
	InChI InChI=1S/Cr.5O.2Pb/q;;;;2*-1;;+2 Key: BXVHGCHMBBNRBU-UHFFFAOYSA-N;
	SMILES [O-][Cr](=O)(=O)[O-].O=[Pb].[Pb+2];
Properties
Chemical formula	CrO5Pb2
Molar mass	546.4 g·mol−1
Appearance	red solid
Density	6.63 g/cm3
Melting point	920 °C (1,690 °F; 1,190 K)
Solubility in water	insoluble
Solubility	soluble in acids, alkalis
Structure
Crystal structure	monoclinic
Space group	c2/m
Lattice constant	a = 14.018 Å, b = 5.683 Å, c = 7.143 Å α = 90°, β = 115.23°, γ = 90°
Lattice volume (V)	514.8 Å3
Formula units (Z)	4 units per cell
Thermochemistry
Gibbs free energy (ΔfG⦵)	-1161.3 kJ/mol
Hazards
	GHS labelling:
Pictograms
Signal word	Danger
Hazard statements	H302, H332, H360, H373, H410
Precautionary statements	P203, P260, P264, P270, P271, P273, P280, P301+P317, P304+P340, P317, P318, P319, P330, P391, P405, P501
Threshold limit value (TLV)	0.0002 mg/m3, 0.0005 mg/m3 (STEL)
	NIOSH (US health exposure limits):
IDLH (Immediate danger)	100.0 mg/m3
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Chrome orange is a mixed oxide with the chemical formula Pb₂CrO₅. It has found use as a pigment.