Ammonium chromate

Synonyms

Ammonium chromate(VI); Chromic acid (H2CrO4), diammonium salt; Diammonium chromate; Neutral ammonium chromate; Chromic acid (H2CrO4), ammonium salt (1:2); [ChemIDplus] UN3087

Category

Chromium Compounds, Inorganic

Description

Yellow solid; Loses some ammonia to air; [Merck Index] Fine yellow crystals; Soluble in water; [MSDSonline] Has ammonia smell; [Ullmann]

Sources/Uses

Used in photography, textile printing, and fixing chromate dyes on wool; Also used as an analytical reagent, catalyst, and corrosion inhibitor; [HSDB]

Comments

A mucous membrane irritant; A severe eye irritant; [HSDB] May cause skin sensitization; [eChemPortal: ERMA] A corrosive substance that can cause injury to the skin, eyes, and respiratory tract; May cause skin sensitization; Chromium (VI) compounds are carcinogens that can cause tissue ulceration and injury to the liver and kidneys; [MSDSonline] See "Chromium" and linked occupational diseases.

Biomedical References

Yes

0.0002 mg/m3, as Cr(VI), inhalable particulate matter

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

0.005 mg/m3, as Cr(VI)

Explanatory Notes

The Guide in the Emergency Response Guidebook is for "Oxidizing solid, toxic, n.o.s."

Yes

Yes

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

Yes

Skin burns

Established

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:

• Photographic Processing
• Textiles (Printing, Dyeing, or Finishing)