Chromium trihydroxide

Synonyms

Chromic (III) hydroxide; Chromic acid (H3CrO3); Chromic hydroxide; Chromic oxide gel; Chromic oxide, hydrous; Chromium hydroxide; Chromium hydroxide (Cr(OH)3); Chromium trihydroxide; Chromium(3+) hydroxide; Chromium(III) hydroxide; [ChemIDplus] Chromic hydroxide; [Merck Index]

Category

Chromium Compounds, Inorganic

Description

Blue to green solid; [ICSC] Practically insoluble in water; [Merck Index]

Sources/Uses

Used as a pigment, mordant, catalyst, and tanning chemical; [Merck Index #2225]

Comments

CrIII compounds do not cause chrome ulcerations but may cause allergic dermatitis in workers with prior sensitization to CrVI compounds. [ILO Encyclo] CrIII is an essential trace mineral in the human diet. [ATSDR Case Studies] An eye irritant; [ICSC] A powerful skin, eye, and mucous membrane irritant; [HSDB] See "Chromium."

Biomedical References

0.003 mg/m3, as Cr(III), inhalable particulate matter

0.5 mg/m3

Explanatory Notes

Soluble Cr(III) compounds are assigned RSEN and DSEN; "Trivalent chromium compounds--with the exception of chromium(III) acetate, chromium(III) chloride hexahydrate, and chromium(III) nitrate--are insoluble or poorly soluble in water . . ." [ACGIH]

Not classifiable

Not Classifiable

Processes

Industrial Processes with risk of exposure:

• Leather Tanning and Processing
• Painting (Pigments, Binders, and Biocides)
• Textiles (Printing, Dyeing, or Finishing)