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1327-53-3

Name Arsenic(III) oxide
CAS 1327-53-3
EINECS(EC#) 215-481-4
Molecular Formula As2O3
MDL Number MFCD00003433
Molecular Weight 197.84
MOL File 1327-53-3.mol

Chemical Properties

Appearance Arsenic trioxide is a noncombustible, odorless, white powder or colorless crystalline solid.
Melting point  312.3 °C
Boiling point  465°C
density  3,738 g/cm3
vapor pressure  0.033Pa at 25℃
Fp  465°C subl.
storage temp.  Poison room
solubility  37 g/L (20°C)
form  Powder
color  White
Specific Gravity 3.738
Water Solubility  37 g/L (20 ºC)
Merck  14,804
CAS DataBase Reference 1327-53-3(CAS DataBase Reference)
NIST Chemistry Reference Diarsenic oxide(1327-53-3)
EPA Substance Registry System 1327-53-3(EPA Substance)

Safety Data

Hazard Codes  T+,N
Risk Statements 
R45:May cause cancer.
R28:Very Toxic if swallowed.
R34:Causes burns.
R50/53:Very Toxic to aquatic organisms, may cause long-term adverse effects in the aquatic environment .
Safety Statements 
S53:Avoid exposure-obtain special instruction before use .
S45:In case of accident or if you feel unwell, seek medical advice immediately (show label where possible) .
S60:This material and/or its container must be disposed of as hazardous waste .
S61:Avoid release to the environment. Refer to special instructions safety data sheet .
RIDADR  UN 1561 6.1/PG 2
WGK Germany  3
RTECS  CG3325000
TSCA  Yes
HazardClass  6.1
PackingGroup  II
HS Code  28112990
Safety Profile
Confirmed human carcinogen with experimental neoplastigenic and tumorigenic data. Poison by ingestion, subcutaneous, and intravenous routes. Human systemic effects by ingestion: sleep changes, muscle weakness, hypermotiltty, darrhea, cardiac arrhythmias, coma, fatty degeneration of the liver, depressed renal function tests. An experimental teratogen. Other experimental reproductive effects. Mutation data reported. Reacts vigorously with Rb2C2, CIF3, F2, Hg, OF2, NaClO3. See also ARSENIC COMPOUNDS.
Hazardous Substances Data 1327-53-3(Hazardous Substances Data)
Toxicity
LD50 in mice, rats (mg/kg): 39.4, 15.1 orally (Harrison)

Hazard Information

Material Safety Data Sheet(MSDS)