Agent Name

Ammonium dichromate

CAS Number

7789-09-5

Formula

Cr2-H2-O7.2H3-N

Major Category

Metals

Synonyms

Ammonio (bicromato di) [Italian]; Ammonio (dicromato di) [Italian]; Ammonium (dichromate d') [French]; Ammonium bichromate; Ammonium chromate ((NH4)2Cr2O7); Ammonium dichromate (VI); Ammoniumbichromaat [Dutch]; Ammoniumdichromaat [Dutch]; Ammoniumdichromat [German]; Bichromate d'ammonium [French]; Chromic acid (H2Cr2O7), diammonium salt; Diammonium dichromate; Dichromic acid (H2Cr2O7), diammonium salt; [ChemIDplus] UN1439

Category

Chromium Compounds, Inorganic

Description

Bright orange-red odorless solid; Very soluble in water; [Merck Index] Orange or red odorless crystalline solid; [MSDSonline]

Sources/Uses

Used in photo engraving, dye mordants, pigments, oil purification, pickling, leather tanning, photography, process engraving, lithography, pyrotechnics, and glazes for porcelain and chinawares; [HSDB] Used as a nitrogen source and to make magnetic recording materials; [Merck Index] Used in pyrotechnics, wood preserving, and lithography; Regulated in Germany as an explosive, and it is distributed moist; [Ullmann]

Comments

A strong oxidizing agent that is a skin and eye irritant, a dangerous fire risk, and potentially explosive if in contact with organic substances; [Hawley] A skin, eye, nose, and throat irritant; [HSDB] May cause asthma, perforation of the nasal septum, and skin ulcers; [CAMEO] Chromium (VI) compounds are carcinogens and reproductive toxins; [ICSC] Explosion hazard; An irritant; May cause serious eye injury; May cause skin and respiratory sensitization after prolonged contact; [MSDSonline] See "Chromium" and the linked diseases.

Exposure Assessment
TLV (ACGIH)

0.01 mg/m3, as Cr

PEL (OSHA)

0.005 mg/m3, as Cr

Lethal Concentration

LC50 (rat) = male: 82 mg/m3/4 hr; female: 45 mg/m3/4 hr

Flammability (NFPA)

1: Must be preheated

Adverse Effects
Reproductive Toxin

Yes

Skin Sensitizer

Yes

Asthma

Yes

Dermatotoxin

Skin Burns

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:

Activities

Activities with risk of exposure: