Home Categories API chromic anhydride
A2362712

chromic anhydride , 99.9%metalsbasis , 1333-82-0

Synonym(s):
Chromic anhydride;Chromic anhydride, Chromium trioxide;Chromium(VI) oxide

CAS NO.:1333-82-0

Empirical Formula: CrO3

Molecular Weight: 99.99

MDL number: MFCD00010952

EINECS: 215-607-8

Update time: 2022-07-08

PRODUCT Properties

Melting point: 196 °C (dec.)(lit.)
Boiling point: 330 °C
Density  2.7
vapor pressure  0Pa at 25℃
Flash point: 250°C
storage temp.  Store below +30°C.
solubility  1.667g/l
form  macroporous
pka -0.61[at 20 ℃]
Specific Gravity 2.7
color  Reddish-violet
PH <1 (100g/l, H2O, 20℃)
Water Solubility  Highly soluble
FreezingPoint  170~172℃
Sensitive  Hygroscopic
Merck  14,2235
crystal system Nogata
Space group Ama2
Lattice constant
a/nmb/nmc/nmα/oβ/oγ/oV/nm3
0.57430.85570.47899090900.2353

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
Stability: Stable. Strong oxidizer. Reacts with most organic material in a violent and often explosive fashion. Moisture sensitive.
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 Chromium(VI) trioxide (1333-82-0)

Description and Uses

Chromium hydroxide (Cr2O(OH)4) is a bright bluish-green pigment prepared by the calcinations of bichromate with boric acid at 500°C. The mass during cooling is hydrolyzed with water, which yields the hydrate.

Chromium(VI) oxide is widely used in chromium electroplating, and as protective coatings in corrosion/oxidation resistance of metals. It is also employed in CDs and DVDs. It is useful as an oxidant in Jones oxidation in acetic acid or acetone. It is used in the oxidation of primary alcohols into carboxylic acids, and secondary alcohols into ketones. With phosphoric acid, it is used as a stripping agent for anodic coatings of all types and in the production of syntheric rubies.

Safety

Symbol(GHS) 
GHS03,GHS05,GHS06,GHS08,GHS09
Signal word  Danger
Hazard statements  H271-H301+H311-H314-H317-H330-H334-H335-H340-H350-H361f-H372-H410
Precautionary statements  P210-P260-P280-P303+P361+P353-P304+P340+P310-P305+P351+P338
Hazard Codes  O,T+,N,T
Risk Statements  45-46-9-24/25-26-35-42/43-48/23-50/53-62-8
Safety Statements  53-45-60-61-36/37/39-28-26-22
RIDADR  UN 1463 5.1/PG 2
OEB E
OEL TWA: 0.0002 mg/m3 (8-hours)
WGK Germany  3
RTECS  GB6650000
TSCA  Yes
HazardClass  5.1
PackingGroup  II
HS Code  28191000
Hazardous Substances Data 1333-82-0(Hazardous Substances Data)
Toxicity LD50 oral (rat) 80 mg/kg
PEL (OSHA) 0.1 mg (CrO3)/m3 (ceiling)
TLV-TWA (ACGIH) 0.05 mg (Cr)/m3
IDLA 15 mg Cr(VI)/m3

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