Paris green

Paris green
Paris green
Color coordinates
Hex triplet	#50C878
sRGBB (r, g, b)	(80, 200, 120)
HSV (h, s, v)	(140°, 60%, 78%)
CIELChuv (L, C, h)	(72, 71, 137°)
Source	Maerz and Paul
ISCC–NBS descriptor	Vivid yellowish green
	B: Normalized to [0–255] (byte);

Paris green
	A subunit of the Cu(C2H3O2)2·3Cu(AsO2)2 framework, highlighting the As3O3−6 ligand. Color code: Cu = blue, As = large gray, C = gray, O = red.
Names
	Other names C.I. pigment green 21; Emerald green; Imperial green; Mitis green; Schweinfurt green; Veronese green; Vienna green;
Identifiers
CAS Number	12002-03-8 ;
3D model (JSmol)	Interactive image; Interactive image;
ChemSpider	17215797;
ECHA InfoCard	100.125.242
EC Number	601-658-7;
PubChem CID	22833492;
UNII	X4916E1P1M ;
UN number	1585
CompTox Dashboard (EPA)	DTXSID0024846 ;
	InChI InChI=1S/2C2H4O2.6AsHO2.4Cu/c21-2(3)4;62-1-3;;;;/h21H3,(H,3,4);6(H,2,3);;;;/q;;;;;;;;4*+2/p-8 Key: HTSABAUNNZLCMN-UHFFFAOYSA-F;
	SMILES CC(=O)[O-].CC(=O)[O-].[O-][As]=O.[O-][As]=O.[O-][As]=O.[O-][As]=O.[O-][As]=O.[O-][As]=O.[Cu+2].[Cu+2].[Cu+2].[Cu+2]; CC(=O)[O-].CC(=O)[O-].[O-][As]0O[As]([O-])O[As]([O-])O0.[O-][As]0O[As]([O-])O[As]([O-])O0.[Cu+2].[Cu+2].[Cu+2].[Cu+2];
Properties
Chemical formula	Cu(C2H3O2)2·3Cu(AsO2)2
Molar mass	1013.79444 g⋅mol−1
Appearance	Emerald green crystalline powder
Density	>1.1 g/cm3 (20 °C (68 °F; 293 K))
Melting point	> 345 °C (653 °F; 618 K)
Boiling point	decomposes
Solubility in water	insoluble
Hazards
	GHS labelling:
Pictograms
Signal word	Danger
Hazard statements	H300, H313, H331, H411
Precautionary statements	P261, P264, P273, P280, P301+P310, P304+P340
NFPA 704 (fire diamond)	4 1 0
	Lethal dose or concentration (LD, LC):
LD50 (median dose)	22 mg/kg
	NIOSH (US health exposure limits):
PEL (Permissible)	TWA 0.01 mg/m3 (as As)
REL (Recommended)	0.002 mg/m3 (15-minute, as As)
IDLH (Immediate danger)	5 mg/m3 (as As)]
Safety data sheet (SDS)	Toronto Research Chemicals SDS
	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

Paris green (copper(II) acetate triarsenite or copper(II) acetoarsenite) is an arsenic- and copper-containing pigment. It is an emerald-green crystalline powder that is also known as Mitis green, Schweinfurt green, Sattler green, emerald green, Vienna green, emperor green or mountain green. It is highly toxic and has thus also been used as a rodenticide and insecticide. Its formula is Cu(C₂H₃O₂)₂·3Cu(AsO₂)₂.

It was manufactured in 1814 to be a pigment to make a vibrant green paint, and was used by many notable painters in the 19th century. The color of Paris green is said to range from a pale blue-green when very finely ground, to a deeper green when coarsely ground. Due to the presence of arsenic, the pigment is extremely toxic. In paintings, the color can degrade quickly.