Arsenic trichloride

Arsenic trichloride
Names
	Other names Arsenic(III) chloride, Arsenous trichloride, Arsine trichloride, Butter of arsenic, de Valagin's solution, Trichloroarsine
Identifiers
CAS Number	7784-34-1 ;
3D model (JSmol)	Interactive image;
ChemSpider	22974 ;
ECHA InfoCard	100.029.144
EC Number	232-059-5;
PubChem CID	24570;
RTECS number	CG1750000;
UNII	5XW39M1300;
UN number	1560
CompTox Dashboard (EPA)	DTXSID3042556 ;
	InChI InChI=1S/AsCl3/c2-1(3)4 Key: OEYOHULQRFXULB-UHFFFAOYSA-N ; InChI=1/AsCl3/c2-1(3)4 Key: OEYOHULQRFXULB-UHFFFAOYAG;
	SMILES Cl[As](Cl)Cl;
Properties
Chemical formula	AsCl3
Molar mass	181.28 g/mol
Appearance	colourless oily liquid
Density	2.163 g/cm3, liquid
Melting point	−16.2 °C (2.8 °F; 256.9 K)
Boiling point	130.2 °C (266.4 °F; 403.3 K)
Solubility in water	Hydrolyzes
Solubility	soluble in alcohol, ether, HCl, HBr, chloroform, CCl4
Magnetic susceptibility (χ)	-79.9·10−6 cm3/mol
Refractive index (nD)	1.6006
Viscosity	9.77 x 10−6 Pa s
Hazards
	Occupational safety and health (OHS/OSH):
Main hazards	Very toxic, carcinogen, corrosive, decomposes on contact with water releasing HCl
	GHS labelling:
Pictograms
Signal word	Danger
Hazard statements	H301, H310, H314, H331, H350, H410
Precautionary statements	P201, P202, P260, P261, P262, P264, P270, P271, P273, P280, P281, P301+P310, P301+P330+P331, P302+P350, P303+P361+P353, P304+P340, P305+P351+P338, P308+P313, P310, P311, P321, P322, P330, P361, P363, P391, P403+P233, P405, P501
NFPA 704 (fire diamond)	4 0 1
	Lethal dose or concentration (LD, LC):
LD50 (median dose)	48 mg/kg
LCLo (lowest published)	100 mg/m3 (cat, 1 hr); 200 mg/m3 (cat, 20 min); 338 ppm (rat, 10 min)
	NIOSH (US health exposure limits):
PEL (Permissible)	[1910.1018] TWA 0.010 mg/m3
REL (Recommended)	Ca C 0.002 mg/m3 [15-minute]
IDLH (Immediate danger)	Ca [5 mg/m3 (as As)]
Related compounds
Other anions	Arsenic trioxide, Arsenic trifluoride
Other cations	Antimony trichloride
	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

Arsenic trichloride is an inorganic compound with the formula AsCl₃, also known as arsenous chloride or butter of arsenic. This poisonous oil is colourless, although impure samples may appear yellow. It is an intermediate in the manufacture of organoarsenic compounds.^[4]

^ John Rumble (June 18, 2018). CRC Handbook of Chemistry and Physics (99th ed.). CRC Press. pp. 4–41. ISBN 978-1138561632.
^ ^a ^b ^c NIOSH Pocket Guide to Chemical Hazards. "#0038". National Institute for Occupational Safety and Health (NIOSH).
^ "Arsenic (inorganic compounds, as As)". Immediately Dangerous to Life or Health Concentrations (IDLH). National Institute for Occupational Safety and Health (NIOSH).
^ Sabina C. Grund, Kunibert Hanusch, Hans Uwe Wolf "Arsenic and Arsenic Compounds" in Ullmann's Encyclopedia of Industrial Chemistry, VCH-Wiley, 2008, Weinheim.doi:10.1002/14356007.a03_113.pub2

[crc-1] John Rumble (June 18, 2018). CRC Handbook of Chemistry and Physics (99th ed.). CRC Press. pp. 4–41. ISBN 978-1138561632.

[PGCH-2] NIOSH Pocket Guide to Chemical Hazards. "#0038". National Institute for Occupational Safety and Health (NIOSH).

[3] "Arsenic (inorganic compounds, as As)". Immediately Dangerous to Life or Health Concentrations (IDLH). National Institute for Occupational Safety and Health (NIOSH).

[Ullmann-4] Sabina C. Grund, Kunibert Hanusch, Hans Uwe Wolf "Arsenic and Arsenic Compounds" in Ullmann's Encyclopedia of Industrial Chemistry, VCH-Wiley, 2008, Weinheim.doi:10.1002/14356007.a03_113.pub2

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