Paris green

For the 1920 American silent film, see Paris Green (film). For the Boardwalk Empire episode, see Paris Green (Boardwalk Empire).
"Mountain green" redirects here. For the place in Utah, see Mountain Green, Utah.
Paris green
Names
Other names
C.I. pigment green 21, emerald green, Schweinfurt green, imperial green, Vienna green, Mitis green, Veronese green[1]
Identifiers
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.125.242 Edit this at Wikidata
EC Number
  • 601-658-7
UNII
UN number 1585
  • InChI=1S/2C2H4O2.6AsHO2.4Cu/c2*1-2(3)4;6*2-1-3;;;;/h2*1H3,(H,3,4);6*(H,2,3);;;;/q;;;;;;;;4*+2/p-8
    Key: HTSABAUNNZLCMN-UHFFFAOYSA-F
  • 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
Cu(C2H3O2)2·3Cu(AsO2)2
Molar mass 1013.79444 g/mol
Appearance Emerald green crystalline powder
Density >1.1 g/cm3 (20 °C)
Melting point > 345 °C (653 °F; 618 K)
Boiling point decomposes
insoluble
Solubility soluble but unstable in acids
insoluble in alcohol
Hazards
GHS labelling:
GHS06: ToxicGHS09: Environmental hazard
Danger
H302, H410
P260, P264, P273, P280, P301+P312, P301+P330+P331, P303+P361+P353, P304+P340, P305+P351+P338, P310, P362, P391, P405, P501
Lethal dose or concentration (LD, LC):
22 mg/kg
NIOSH (US health exposure limits):
PEL (Permissible)
 [1910.1018] TWA 0.010 mg/m3[2]
REL (Recommended)
 Ca C 0.002 mg/m3 [15-minute][2]
IDLH (Immediate danger)
 Ca [5 mg/m3 (as As)][2]
Safety data sheet (SDS) CAMEO MSDS
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Paris green
 
About these coordinates     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°)
SourceMaerz and Paul[3]
ISCC–NBS descriptorVivid yellowish green
B: Normalized to [0–255] (byte)

Paris green (copper(II) acetate triarsenite or copper(II) acetoarsenite) is an arsenic-based organic pigment. As a green pigment it is also known as Mitis green, Schweinfurt green, Sattler green, emerald, Vienna green, Emperor green or Mountain green. It is a highly toxic emerald-green crystalline powder[4] that has been used as a rodenticide and insecticide,[5] and also as a pigment.

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.

  1. ^ "Health & Safety in the Arts -- Painting & Drawing Pigments". Environmental Management Division, City of Tucson AZ. Archived from the original on 20 July 2011. Retrieved 7 February 2011.
  2. ^ a b c NIOSH Pocket Guide to Chemical Hazards. "#0038". National Institute for Occupational Safety and Health (NIOSH).
  3. ^ The color displayed in the color box above matches the color called emerald green in the 1930 book by Maerz and Paul A Dictionary of Color New York:1930 McGraw-Hill; the color emerald green is displayed on page 75, Plate 26, Color Sample J10.
  4. ^ "Hazardous Substance Fact Sheet" (PDF). NJ Dept. of Health and Senior Services. Retrieved 7 February 2011.
  5. ^ "Dangers in the Manufacture of Paris Green and Scheele's Green". Monthly Review of the U.S. Bureau of Labor Statistics. 5 (2): 78–83. 1917. JSTOR 41829377.