Sodium chromate

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; [ICSC] Can cause burns; Very toxic by inhalation; May cause skin and respiratory sensitization after prolonged contact; [eChemPortal: ESIS] See "Chromium" and linked occupational diseases.

Biomedical References

Yes

0.0001 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)

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

Explanatory Notes

The Guide in the Emergency Response Guidebook is for "Toxic solid, inorganic, 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:

• Applying Wood Preservatives
• Leather Tanning and Processing
• Painting (Pigments, Binders, and Biocides)
• Petroleum Production and Refining
• Textiles (Printing, Dyeing, or Finishing)