Calcium dichromate

Agent Name
Calcium dichromate
CAS Number
14307-33-6
Formula
Ca.Cr2-O7
Major Category
Metals
Calcium dichromate formula graphical representation
Synonyms
Calcium chromate; Calcium dichromate(VI); Chromic acid (H2Cr2O7), calcium salt (1:1); Chromic acid, calcium salt (1:1) (9CI); Dichromic acid, calcium salt (1:1); [ChemIDplus] Calcium bichromate; [Merck Index]
Category
Chromium Compounds, Inorganic
Description
Trihydrate: Brownish-red deliquescent solid; Soluble in water; [Hawley] Trihydrate: orange-red solid; Not hygroscopic if pure; [Merck Index]
Sources/Uses
Used as corrosion inhibitor, catalyst, and to make other chromium compounds; [Hawley]
Comments
CrVI compounds are irritants, sensitizers, and may be corrosive to the skin. CrVI compounds are respiratory tract irritants and may cause pulmonary sensitization. CrVI may cause acute tubular necrosis and liver injury. [ATSDR Case Studies] Readily forms hydrates: hexahydrate at <10 deg C, pentahydrate at 20-40 deg C, pentahydrate at 50-60 deg C, and the monohydrate at >70 deg C; [Ullmann] See "Chromium" and linked occupational diseases.
Biomedical References

Exposure Assessment

Skin Designation (ACGIH)
Yes
TLV (ACGIH)
0.0002 mg/m3, as Cr(VI), inhalable particulate matter
STEL (ACGIH)
0.0005 mg/m3, as Cr(VI), inhalable particulate matter
PEL (OSHA)
0.005 mg/m3, as Cr(VI)

Adverse Effects

Skin Sensitizer
Yes
Asthma
Yes
Hepatotoxin
Hepatoxic (a) from occupational exposure (secondary effect) or (b) in animal studies or in humans after ingestion
Nephrotoxin
Yes
Dermatotoxin
Skin burns
IARC Carcinogen
Established
NTP Carcinogen
Human carcinogen
ACGIH Carcinogen
Confirmed Human

Diseases, Processes, and Activities Linked to This Agent

Diseases

Occupational diseases associated with exposure to this agent: