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Inorganic Acids REACH

Chromic acid

CAS Number
7738-94-5
EC Number
231-801-5
Chemical Formula
CrH2O4
Molecular Weight
118.010 g/mol
Industries:Textile, Leather & PaperMining & Metals

Description

Chromic acid (CAS 7738-94-5 ) is a strong inorganic oxidizing acid used primarily in metal surface treatment and industrial finishing operations. In practice, it exists as an aqueous solution of chromium trioxide and is sourced and handled in that form by most industrial buyers. In metal finishing and electroplating, chromic acid is the active constituent of hard chrome and decorative chrome plating baths. It produces wear-resistant and corrosion-inhibiting coatings on various industrial components. Anodizing operations for aluminum use chromic acid electrolyte processes where a thin, corrosion-resistant oxide layer is required. This is particularly critical in specialized aerospace and defense applications. In the textile and leather industries, it functions as an oxidizing bleach and surface modifier. This improves dye uptake and prepares fiber substrates for various types of downstream processing. Mining and metals operations use it in passivation treatments to protect metal surfaces against oxidation during storage and transit. This ensures the integrity of the metal before it reaches the end user. Chromic acid is supplied as an aqueous solution, with chromium trioxide dissolved in water to produce the active acid. Technical grade is the standard commercial form for most industrial applications. Concentration is typically specified by the buyer according to specific process requirements. Industrial supply is subject to regulatory controls in many jurisdictions due to hexavalent chromium content. Buyers should confirm compliance documentation alongside standard quality specifications. Proper handling and storage protocols must be maintained to ensure safety and environmental protection during use. Contact us for supply of Chromic acid Request Quote

Other Names (Synonyms)

Tetraoxochromic acid | Chromic(VI) acid | [CrO2(OH)2] | H2CrO4 | Chromic acid (H2CrO4) | Acide chromique | SA8VOV0V7Q | dihydrogen(tetraaoxidochromate)

Key Technical Features

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

Physical Properties

Melting Point196 °C
Boiling Point250 °C (decomposes)
Density1.67-2.82 g/cm³
AppearanceChromic acid is a dark purplish-red odorless flakes or crystalline powder
ColorClear, orange
OdorOdorless
FormLiquid
Water SolubilityHIGHLY Soluble
pH3.03(1 mM solution)
2.33(10 mM solution)
2.06(100 mM solution)

Safety & Handling

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

Hazard Statements

H271May cause fire or explosion; strong Oxidizer
H300Fatal if swallowed
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
H340May cause genetic defects
H341Suspected of causing genetic defects
H350May cause cancer
H361Suspected of damaging fertility or the unborn child
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.
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.
P391Collect spillage.
P403Store in a well-ventilated place.
P405Store locked up.
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.
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

UN Number1463