Agent Name

Ammonium chromate

CAS Number

7788-98-9

Formula

Cr-H2-O4.2H3-N

Major Category

Metals

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.

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)

Explanatory Notes

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

Adverse Effects
Skin Sensitizer

Yes

Asthma

Yes

Hepatotoxin

Hepatotoxin, Secondary

Nephrotoxin

Yes

Dermatotoxin

Skin Burns

IARC Carcinogen

Known Carcinogen

ACGIH Carcinogen

Confirmed Human

Links to Other NLM Databases
Health Studies

Human Health Effects from Hazardous Substances Data Bank:

Toxicity Information

Search TOXNET

Chemical Information

Search ChemIDplus

Related Information in HazMap
Diseases

Occupational diseases associated with exposure to this agent:

Processes

Industrial Processes with risk of exposure: