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

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 point196 °C (dec.)(lit.)
Boiling point330 °C
bulk density900kg/m3
density2.7
vapor pressure0Pa at 25℃
Fp250°C
storage temp.Store below +30°C.
solubility1.667g/l
pka-0.61[at 20 ℃]
formmacroporous
colorReddish-violet
Specific Gravity2.7
PH<1 (100g/l, H2O, 20℃)
Water SolubilityHighly soluble
FreezingPoint170~172℃
SensitiveHygroscopic
Merck142,235
crystal systemNogata
Space groupAma2
Lattice constanta/nmb/nmc/nmα/oβ/oγ/oV/nm30.57430.85570.47899090900.2353
Exposure limitsACGIH: 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.
InChI1S/Cr.3O
InChIKeyWGLPBDUCMAPZCE-UHFFFAOYSA-N
SMILESO=[Cr](=O)=O
CAS DataBase Reference1333-82-0(CAS DataBase Reference)
NIST Chemistry ReferenceChromium trioxide(1333-82-0)
EPA Substance Registry SystemChromium(VI) trioxide (1333-82-0)


Safety Information


Hazard CodesO,T+,N,T
Risk Statements45-46-9-24/25-26-35-42/43-48/23-50/53-62-8
Safety Statements53-45-60-61-36/37/39-28-26-22
OEBE
OELTWA: 0.0002 mg/m3 (8-hours)
RIDADRUN 1463 5.1/PG 2
WGK Germany3
RTECSGB6650000
TSCATSCA listed
HazardClass5.1
PackingGroupII
HS Code28191000
Storage Class5.1A - Strongly oxidizing hazardous materials
Hazard ClassificationsAcute 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 Data1333-82-0(Hazardous Substances Data)
ToxicityLD50 oral (rat) 80 mg/kg

PEL (OSHA) 0.1 mg (CrO3)/m3 (ceiling)

TLV-TWA (ACGIH) 0.05 mg (Cr)/m3
IDLA15 mg Cr(VI)/m3


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