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1333-82-0

Name Chromic acid
CAS 1333-82-0
EINECS(EC#) 215-607-8
Molecular Formula CrH2O4
MDL Number MFCD00010952
Molecular Weight 118.01
MOL File 1333-82-0.mol

Chemical Properties

Appearance Chromium trioxide is a dark-red crystalline substance. It is odorless
Melting point  196 °C (dec.)(lit.)
Boiling point  330 °C
density  2.7
vapor pressure  0Pa at 25℃
Fp  250°C
storage temp.  Store below +30°C.
solubility  1.667g/l
form  macroporous
pka -0.61[at 20 ℃]
color  Reddish-violet
Specific Gravity 2.7
PH <1 (100g/l, H2O, 20℃)
Stability: Stable. Strong oxidizer. Reacts with most organic material in a violent and often explosive fashion. Moisture sensitive.
Water Solubility  Highly soluble
FreezingPoint  170~172℃
Sensitive  Hygroscopic
Merck  14,2235
Exposure limits ACGIH: TWA 0.0002 mg/m3; STEL 0.0005 mg/m3 (Skin)
OSHA: Ceiling 0.1 mg/m3
NIOSH: IDLH 15 mg/m3; TWA 0.0002 mg/m3
InChIKey WGLPBDUCMAPZCE-UHFFFAOYSA-N
CAS DataBase Reference 1333-82-0(CAS DataBase Reference)
NIST Chemistry Reference Chromium trioxide(1333-82-0)
EPA Substance Registry System 1333-82-0(EPA Substance)

Safety Data

Hazard Codes  O,T+,N,T
Risk Statements 
R45:May cause cancer.
R9:Explosive when mixed with combustible material.
R24/25:Toxic in contact with skin and if swallowed .
R26:Very Toxic by inhalation.
R35:Causes severe burns.
R42/43:May cause sensitization by inhalation and skin contact .
R48/23:Toxic: danger of serious damage to health by prolonged exposure through inhalation .
R50/53:Very Toxic to aquatic organisms, may cause long-term adverse effects in the aquatic environment .
R62:Possible risk of impaired fertility.
R8:Contact with combustible material may cause fire.
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 .
S36/37/39:Wear suitable protective clothing, gloves and eye/face protection .
S28:After contact with skin, wash immediately with plenty of ... (to be specified by the manufacturer) .
S26:In case of contact with eyes, rinse immediately with plenty of water and seek medical advice .
S22:Do not breathe dust .
RIDADR  UN 1463 5.1/PG 2
WGK Germany  3
RTECS  GB6650000
TSCA  Yes
HazardClass  5.1
PackingGroup  II
HS Code  28191000
Hazardous Substances Data 1333-82-0(Hazardous Substances Data)
IDLA 15 mg Cr(VI)/m3

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