Agent Name | Calcium dichromate |
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CAS Number | 14307-33-6 |
Formula | Ca.Cr2-O7 |
Major Category | Metals |
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. |
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 | Hepatotoxin, Secondary |
Nephrotoxin | Yes |
Dermatotoxin | Skin Burns |
IARC Carcinogen | Known Carcinogen |
NTP Carcinogen | Human Carcinogen |
ACGIH Carcinogen | Confirmed Human |
Links to Other NLM Databases | |
Toxicity Information | |
Chemical Information | |
Related Information in HazMap | |
Diseases | Occupational diseases associated with exposure to this agent: |