Agent Name

Zinc chromates

CAS Number

13530-65-9; 11103-86-9; 37300-23-5

Formula

Cr-H2-O4.Zn, and others

Major Category

Metals

Synonyms

Basic zinc chromate; Buttercup Yellow; C.I. 77955; CI 77955; Chromic acid (H2CrO4), zinc salt (1:1); Chromic acid, zinc salt; Chromium zinc oxide (ZnCrO4); Pigment Yellow 36; ZTO; Zinc Chrome Yellow; Zinc chromate; Zinc chromate AM; Zinc chromate C; Zinc chromate O; Zinc chromate T; Zinc chromate Z; Zinc chromate(VI) hydroxide; Zinc chromates (ACGIH); Zinc chrome; Zinc chrome (anti-corrosion); Zinc chromium oxide (ZnCrO4); Zinc hydroxychromate; Zinc tetraoxychromate; Zinc tetraoxychromate 76A; Zinc tetraoxychromate 780B; Zinc tetroxychromate; Zinc yellow; Zincro ZTO; [ChemIDplus] Basic zinc chromate: ZnCro4; Zinc potassium chromate: KZn2(CrO4)2OH; Zinc yellow: 4ZnO.K2O.4CrO3H2O (approx); [ACGIH]

Category

Chromium Compounds, Inorganic

Description

Yellow solids that are "sparingly soluble in water"; [ACGIH]

Sources/Uses

Zinc chromates are used primarily in priming paints to prevent corrosion. They are also used as pigments. There is confusion in the naming of these compounds. [ACGIH]

Comments

Occupational exposure can cause skin ulcers, lung irritation, and lung cancer. [HSDB] Kidney injury has been reported in workers exposed to hexavalent chromium compounds; [ACGIH] Inhalation may cause irritation; Asthma and skin sensitization are potential adverse effects; [ICSC] "Excess risk for lung cancer has been clearly established in facilities where zinc chromate was produced." [IARC] See "Chromium" and linked occupational diseases.

Exposure Assessment
Skin Designation (ACGIH)

Insufficient data

Bioaccumulates

Yes

TLV (ACGIH)

0.01 mg/m3, as Cr

PEL (OSHA)

0.005 mg/m3, as Cr (for CAS 13530-65-9), Ceiling(OSHA) = 0.1 mg/m3, as CrO3 (for CAS 11103-86-9 and 37300-23-5)

IDLH (NIOSH)

15 mg/m3, as Cr(VI)

Half Life

For zinc, whole body: 162-500 days; [TDR, p. 1245]

Adverse Effects
Nephrotoxin

Yes

Reproductive Toxin

Yes

Skin Sensitizer

Yes

Asthma

Yes

Hepatotoxin

Hepatotoxin, Secondary

Dermatotoxin

Skin Burns

IARC Carcinogen

Known Carcinogen

NTP Carcinogen

Human Carcinogen

ACGIH Carcinogen

Confirmed Human

Links to Other NLM Databases
Health Studies

Human Health Effects from Hazardous Substances Data Bank:

Toxicity Information

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Chemical Information

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Biomedical References

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Related Information in HazMap
Diseases

Occupational diseases associated with exposure to this agent:

Processes

Industrial Processes with risk of exposure: