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

Basic Information

Exceptional Oxidizing Power：Chromium trioxide is an extremely strong oxidizing agent, highly effective in oxidizing organic and inorganic substances.

High Solubility and Versatile Compatibility：It dissolves readily in water, alcohol, sulfuric acid, and ether, enabling flexible use in various chemical processes and formulations.

Efficient Formation of Chromic Acid：When dissolved in water, it forms chromic acid, a powerful oxidizing and glass-cleaning agent widely used in laboratory and industrial applications.

Thermal Reactivity and Stability：Exhibits defined thermal behavior, decomposing at elevated temperatures (around 400°C) to form chromium(III) oxide, making it suitable for controlled high-temperature applications.

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product description

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

Chromium(VI) oxide, also chromium trioxide (CrO₃), is dark red rhombic crystal or purplish-red flake. It dissolves in water, alcohol, sulfuric acid and ether, but insoluble in acetone, with relative density 2.70 and melting point 196°C.

It is prepared by adding concentrated sulfuric acid into cooled concentrated sodium dichromate solution, then filtered, rinsed with nitric acid and dried at 120°C.

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

Chromium(VI) oxide is widely used for chromium electroplating and metal anti-corrosion coatings, and also applied in optical disc production.

It acts as a powerful oxidant in organic synthesis, especially for Jones oxidation. It oxidizes primary alcohols to carboxylic acids and secondary alcohols to ketones.

Product Information

Parameters

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	142,235
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

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