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Chromium trioxide

CAS Number
1333-82-0
EC Number
215-607-8
Chemical Formula
CrO3
Molecular Weight
99.994 g/mol
Industries:Water TreatmentTextile, Leather & PaperPrinting & PackagingMining & Metals

Description

Chromium trioxide (CAS 1333-82-0 ), also known as chromic trioxide, is a strong inorganic oxidizing agent used primarily in metal surface treatment and electroplating processes. It delivers controlled oxidation and surface activation across a range of industrial finishing operations. In hard chrome electroplating, it forms the electrolyte bath that deposits wear-resistant chromium coatings on industrial components, tooling, and hydraulic parts. Metal surface treatment operations use it to create conversion coatings. These coatings improve corrosion resistance and paint adhesion on aluminum and steel substrates. The leather industry applies it in chrome tanning processes, where it fixes hides and produces durable, consistent leather for footwear and upholstery. In specialty printing and packaging, it functions as an oxidizing agent in the production of certain pigments and surface-etching applications. This chemical is supplied as dark red flakes or granules for various industrial uses. Liquid chromic acid solutions are also available for direct process use. Technical grade is the standard commercial form, with purity levels typically at 99% or higher for electroplating and surface treatment applications. Packaging is available in drums and bulk quantities, with strict regulatory compliance documentation required. This is due to its classification as a substance of very high concern under REACH regulations. Contact us for supply of Chromium trioxide Request Quote

Other Names (Synonyms)

red oxide of chromium | monochromium trioxide | chromic trioxide | chromic oxide | chromic anhydride | anhydride chromique | Chromium(VI) oxide | CrO3

Key Technical Features

  • High Purity Grade standard
  • Consistent Batch Quality
  • Full Regulatory & REACH Support
  • Global Logistics Network enabled

Physical Properties

Melting Point197 °C
Boiling Point330 °C
Density2.70 g/cm³
Flash Point250°C
AppearanceChromium trioxide is a dark-red crystalline substance. It is odorless
ColorReddish-violet
Formmacroporous
Water SolubilityHighly soluble
Vapor Pressure0Pa at 25℃
pH<1 (100g/l, H2O, 20℃)

Safety & Handling

Danger
GHS03· OxidizerGHS05· CorrosiveGHS06· ToxicGHS07· IrritantGHS08· Health HazardGHS09· Environment

Hazard Statements

H271May cause fire or explosion; strong Oxidizer
H272May intensify fire; oxidizer
H290May be corrosive to metals
H301Toxic if swallowed
H310Fatal in contact with skin
H311Toxic in contact with skin
H312Harmful in contact with skin
H314Causes severe skin burns and eye damage
H317May cause an allergic skin reaction
H318Causes serious eye damage
H330Fatal if inhaled
H334May cause allergy or asthma symptoms or breathing difficulties if inhaled
H335May cause respiratory irritation
H340May cause genetic defects
H341Suspected of causing genetic defects
H350May cause cancer
H360May damage fertility or the unborn child
H361Suspected of damaging fertility or the unborn child
H370Causes damage to organs
H372Causes damage to organs through prolonged or repeated exposure
H400Very toxic to aquatic life
H410Very toxic to aquatic life with long lasting effects

Precautionary Statements

P203Obtain, consult and follow expert instructions for use.
P210Keep away from heat, hot surfaces, sparks, open flames and other ignition sources. No smoking.
P220Keep away from clothing and other combustible materials.
P233Keep container tightly closed.
P234Keep only in original packaging.
P260Do not breathe dust/fume/gas/mist/vapours/spray.
P261Avoid breathing dust/fume/gas/mist/vapours/spray.
P262Do not get in eyes, on skin, or on clothing.
P264Wash … thoroughly after handling.
P270Do not eat, drink or smoke when using this product.
P271Use only outdoors or in a well-ventilated area.
P272Contaminated work clothing should not be allowed out of the workplace.
P273Avoid release to the environment.
P280Wear protective gloves/protective clothing/eye protection/face protection.
P283Wear fire-resistant/flame-retardant clothing.
P284In case of inadequate ventilation wear respiratory protection.
P316Get emergency medical help immediately.
P317Get emergency medical help.
P318IF exposed or concerned, get medical advice.
P319Get medical advice/attention if you feel unwell.
P320Specific treatment is urgent (see … on this label).
P321Specific treatment (see … on this label).
P330Rinse mouth.
P363Wash contaminated clothing before reuse.
P390Absorb spillage to prevent material damage.
P391Collect spillage.
P403Store in a well-ventilated place.
P405Store locked up.
P406Store in a corrosion-resistant/… container with a resistant inner liner.
P420Store away from other materials.
P501Dispose of contents/container in accordance with local regulations.
P265Wash … thoroughly after handling.
P316Get emergency medical help immediately.
P352IF ON SKIN: Wash with plenty of water.
P340IF INHALED: Remove person to fresh air and keep comfortable for breathing.
P360IF ON CLOTHING: Rinse immediately contaminated clothing and skin with plenty of water before removing clothes.
P316Get emergency medical help immediately.
P317Get emergency medical help.
P316Get emergency medical help immediately.
P364Take off immediately all contaminated clothing and wash it before reuse.
P364Take off contaminated clothing and wash it before reuse.
P378Use … for extinction.
P233Store in a well-ventilated place. Keep container tightly closed.
P331Rinse mouth. Do NOT induce vomiting.
P354IF ON SKIN: Take off immediately all contaminated clothing. Rinse skin with water/shower.
P338IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
P375Evacuate area.

Trade & Regulatory

HS Code28191000
UN Number1463
ADR Class5.1
Packing GroupII
Storage Class5.1A - Strongly oxidizing hazardous materials
WGK (Germany)3