Chromium(VI) oxide CAS#1333-82-0

CAS Number: 1333-82-0
Chemical Formula: CrO3
Synonyms:

Chromiumtrioxideandydrous
CHROMIC ACID FLAKES 99.5 PERCENT MIN
Chromium(VI) oxide, 99.90%

Appearance: Red Flakes

MOQ (Minimum Order Quantity): 1 FCL (Full Container Load)

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Product Details

Chromium(VI) oxide CAS#1333-82-0

It appears as dark red rhombic crystals or purple-red flakes. Soluble in water, alcohol, sulfuric acid and ether, do not dissolve in acetone.chromium trioxide: A redcompound, CrO3; rhombic; r.d. 2.70;m.p. 196°C. It can be made by carefuladdition of concentrated sulphuricacid to an ice-cooled concentratedaqueous solution of sodium dichromatewith stirring. The mixture isthen filtered through sintered glass,washed with nitric acid, then dried at120°C in a desiccator.
Chromium(VI) oxide is an extremelypowerful oxidizing agent,especially to organic matter; it immediatelyinflames ethanol. It is anacidic oxide and dissolves in water toform ‘chromic acid’, a powerful oxidizingagent and cleansing fluid forglassware. At 400°C, chromium(VI)oxide loses oxygen to givechromium(III) oxide.
Chromium(VI) oxide

Chromium(VI) oxide Chemical Properties

Melting point	196 °C (dec.)(lit.)
Boiling point	330 °C
bulk density	900kg/m3
density	2.7
vapor pressure	0Pa at 25℃
Fp	250°C
storage temp.	Store below +30°C.
solubility	1.667g/l
pka	-0.61[at 20 ℃]
form	macroporous
color	Reddish-violet
Specific Gravity	2.7
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/nm30.57430.85570.47899090900.2353
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.
InChI	1S/Cr.3O
InChIKey	WGLPBDUCMAPZCE-UHFFFAOYSA-N
SMILES	O=[Cr](=O)=O
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)

Safety Information

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
OEB	E
OEL	TWA: 0.0002 mg/m3 (8-hours)
RIDADR	UN 1463 5.1/PG 2
WGK Germany	3
RTECS	GB6650000
TSCA	TSCA listed
HazardClass	5.1
PackingGroup	II
HS Code	28191000
Storage Class	5.1A - Strongly oxidizing hazardous materials
Hazard Classifications	Acute Tox. 2 Inhalation Acute Tox. 3 Dermal Acute Tox. 3 Oral Aquatic Acute 1 Aquatic Chronic 1 Carc. 1A Eye Dam. 1 Muta. 1B Ox. Sol. 1 Repr. 2 Resp. Sens. 1 Skin Corr. 1A Skin Sens. 1 STOT RE 1 Inhalation STOT SE 3
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

Product Application of Chromium(VI) oxide CAS#1333-82-0

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.

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