Zinc dichromate

Synonyms

Chromic acid (H2Cr2O7), zinc salt (1:1); Dichromic acid (H2Cr2O7), zinc salt (1:1); Zinc bichromate; Zinc chromium oxide (ZnCr2O7); Zinc dichromate(VI); [ChemIDplus]

Category

Chromium Compounds, Inorganic

Description

Trihydrate: Orange-yellow or reddish-brown hygroscopic solid; Soluble in acids and liquid ammonia; [HSDB] Trihydrate: Red-brown solid; [MSDSonline]

Sources/Uses

Used as a pigment; [HSDB]

Comments

Solid will burn skin--slow to heal; [CHRIS] Trihydrate: May cause serious eye injury; May cause skin sensitization; [MSDSonline] See "Zinc chromate." See "Chromic acid." See "Chromium" and linked occupational diseases.

Biomedical References

For chromium (VI), water-soluble fume: Total Cr in urine = 10 ug/L (increase during shift) or 25 ug/L (end of shift at end of workweek)

Yes

0.0001 mg/m3, as Cr(VI), inhalable particulate matter

0.0005 mg/m3, as Cr(VI), inhalable particulate matter

0.005 mg/m3, as Cr(V1), Ceiling(OSHA) = 0.1 mg/m3, as CrO3 (for CAS 11103-86-9 and 37300-23-5)

0.1 mg/m3 (respirable fraction), 2 mg/m3 (inhalable fraction)-for Zn inorg. Compds

15 mg/m3, as Cr(VI)

Yes

Yes

Hepatoxic (a) from occupational exposure (secondary effect) or (b) in animal studies or in humans after ingestion

Yes

Skin burns

Established

Human carcinogen

Confirmed Human

Diseases

Occupational diseases associated with exposure to this agent:

• Asthma, occupational
• Chromium, chronic toxic effect
• Contact dermatitis, allergic

Processes

Industrial Processes with risk of exposure:

• Painting (Pigments, Binders, and Biocides)