- Chromic (VI) acid
- Chromium hydroxide oxide
Chromic acid, solid is a dark purplish red solid.
Chromium plating intermediate, medicine (caustic), process engraving, anodizing, ceramic glazes, colored glass, metal cleaning, inks, tanning, paints.
Registry Numbers and Inventories.
Melting point, °C
Sublimation point, °C
110 - 130 (16 C)
Decomposition point, °C
2.70 g/cm3 (20 C)
Solubility in water
6.95 (20 C)
0.00017/K (23 C)
Hazards and Protection.
Isolate. Protect from physical damage. Separate from combustible, organic or other readily oxidizable materials. Protect from moisture. Avoid storage on wooden floors.
All chemicals should be considered hazardous. Avoid direct physical contact. Use appropriate, approved safety equipment. Untrained individuals should not handle this chemical or its container. Handling should occur in a chemical fume hood.
Approved respirators, vaseline for lubrication of nostrils, rubberized outer wear and safety goggles are required. Rubber is poor and pva not recommended for gloves (cheea3 0001); white creams should not be relied upon. They can be used to cover unprotected area. Do not use organic clothes as part of outer wear, must be rubberized fabric.
Wear positive pressure self-contained breathing apparatus (SCBA).
Keep sparks, flames, and other sources of ignition away. Keep material out of water sources and sewers. Neutralize spilled material with crushed limestone, soda ash, or lime. Land spill: Dig a pit, pond, lagoon, holding area to contain liquid or solid material. Cover solids with a plastic sheet to prevent dissolving in rain or fire fighting water. Neutralize with agricultural lime (CaO), crushed limestone (CaCO3) or sodium bicarbonate (NaHCO3). Water spill: Neutralize with agricultural lime (CaO), crushed limestone (CaCO3), or sodium bicarbonate (NaHCO3). Use mechanical dredges or lifts to remove immobilized masses of pollutants and precipitates.
Normally stable. Reactive under extreme conditions. Containers may explode when involved in fire. Violent reaction with powerful reducers.
Keep away from acetic acid, acetic anhydride, acetone, alcohols, alkali metals.
Irritating and toxic fumes.
Flood with water. Apply water from as far a distance as possible.
Will ignite on contact with acetic acid and alcohol. Hazard may be quite evident; can ignite organic matter on contact.
Containers may explode
Fire may produce irritating, corrosive and/or toxic gases.
TLV (as Cr): ppm; 0.05 mg/m3 (ACGIH 1993-1994).
G-A1, I-1, N-1, CP65
The toxological properties of this substance have not been fully investigated.
Causes irritation and burns.
Inhalation of dust is toxic. Causes irritation and burns. Severe over exposure may result in death.
May cause severe burns.
Call a physician; do NOT induce vomiting.
Move patient to fresh air. Monitor for respiratory distress. If cough or difficulty breathing develops, evaluate for respiratory tract irritation, bronchitis, or pneumonitis. Administer oxygen and assist ventilation as required. Treat bronchospasm with beta2 agonist and corticosteroid aerosols.
Immediately dilute with 4 to 8 ounces (120 to 240 ml) of milk or water (not to exceed 4 ounces/120 ml in a child). Do not induce vomiting. Administer ascorbic acid (1 g per 0.135 G of elemental chromium). Neutralization is not indicated. Cautious gastric lavage with a small flexible tube is suggested by some authors.
Wash eyes thoroughly for at least 15 min.; flush contacted skin areas with water; remove contaminated clothing and wash before reuse.
USCG CHRIS Code
Std. Transport #