Odorless yellow solid.
Primarily used in priming paints for metals, for which they provide resistance against corrosion zinc chromates.
Registry Numbers and Inventories.
Tumorigen; Mutagen; Human Data
Swiss Giftliste 1
Japan ENCS (MITI)
Melting point, °C
Boiling point, °C
3.43 g/cm3 (20 C)
Solubility in water
Hazards and Protection.
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.
Wear appropriate equipment to prevent any possibility of skin contact. Wear eye protection to prevent any possibility of eye contact. Chromic acid and chromates (as cro3).
Use NIOSH/MSHA approved respirator appropriate for exposure of concern.
Evacuate area and ventilate. Wear protective equipment. If required, use an inert absrobent. Sweep up and place in an appropriate container for disposal. Wash contaminated surfaces.
Can react with reducing agents to generate heat and products that may be gaseous (causing pressurization of closed containers) Can react violently with active metals, cyanides, esters, and thiocyanates.
Respiratory protection from chromic acid and chromates while fighting fires: Self-contained breathing apparatus with a full facepiece operated in pressure-demand or other positive pressure mode.
TLV (as Cr): ppm; 0.01 mg/m3 A1 (ACGIH 1992-1993).
G-A1, I-1, N-1, CP65
Hepatic encephalopathy, cerebral edema, and coma may occur. Both trivalent and hexavalent chromium have been found to cross the placental barrier in hamsters and mice. Both were shown to enter the fetus during mid to late gestation. Developmental effects caused by both differed between hamster and mice. Fetal uptake of hexavalent chromium was much greater than that of the trivalent form. Effects on placental tissue could have also affected the fetus.
Gastroenteritis and hemorrhage frequently occur immediately following oral ingestion.
Pulmonary edema, pneumoconiosis, metal fume fever, and bronchial asthma may occur.
Deep perforating ulcers and hypersensitivity dermatitis may be noted. Systemic toxicity has resulted from minimal dermal exposure.
Oral burns and severe corneal injury may result from acute exposure. Chronic inhalation produces deep perforating nasal ulcers (chrome holes).
Induce vomiting, followed by prompt and complete gastric lavage, catharsis, and demulcents.
Move to fresh air; if exposure has been severe, get medical attention.
Wash thoroughly with soap and water.
Flush with water.
USCG CHRIS Code