Agent Name

Sodium chromate

CAS Number

7775-11-3

Formula

Cr-H2-O4.2Na

Major Category

Metals

Synonyms

Chromate of soda; Chromic acid (H2(sup 51)CrO4), disodium salt; Chromic acid (H2CrO4), disodium salt; Chromium disodium oxide; Chromium sodium oxide (CrNa2O4); Disodium chromate; Disodium chromate (Na2(sup 51)CrO4); Neutral sodium chromate; Rachromate; Sodium chromate(VI); Chromic acid, disodium salt; [ChemIDplus] UN3288

Category

Chromium Compounds, Inorganic

Description

Yellow hygroscopic solid; Soluble in water; [ICSC] Yellow crystals; [MSDSonline] Hygroscopic--forms several hydrates; [Ullmann]

Sources/Uses

Used to make pigments, inks, coatings, and other chromates; Also used in metal treatment, dyeing (mordant), leather tanning, corrosion inhibition, chlorate manufacturing, and aluminum etching; Use as fungicide (wood preservative) cancelled in the US by the EPA; [HSDB] Used in the textile (dyeing auxiliary) and petroleum (corrosion inhibitor) industries; [Ullmann]

Comments

A corrosive substance that can cause injury to the skin, eyes, and respiratory tract; Can be absorbed through skin; May cause skin sensitization and asthma after prolonged contact; May cause kidney and liver injury; May cause perforated nasal septum; Chromates are human carcinogens and reproductive toxins; [ICSC] Can cause burns; Very toxic by inhalation; May cause skin and respiratory sensitization after prolonged contact; [eChemPortal: ESIS] A corrosive substance that can cause injury to the skin, eyes, and respiratory tract including chemical pneumonitis; May cause skin and respiratory sensitization after prolonged contact; [MSDSonline] See "Chromium" and the linked diseases.

Exposure Assessment
TLV (ACGIH)

0.05 mg/m3, as Cr

PEL (OSHA)

0.005 mg/m3, as Cr(VI)

Lethal Concentration

LC50 (rat) = 33 mg/m3/4h

Explanatory Notes

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

Adverse Effects
Reproductive Toxin

Yes

Skin Sensitizer

Yes

Asthma

Yes

Toxic Pneumonitis

Yes

Hepatotoxin

Hepatotoxin, Secondary

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: