Agent Name

Calcium dichromate

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

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Chemical Information

Search ChemIDplus

Related Information in HazMap
Diseases

Occupational diseases associated with exposure to this agent: