Bright orange crystals that are light sensitive. Potassium dichromate is used as a chrome mordant in dyeing textiles. It is also used to chrome tan leather and stain wood to an orange color. Potassium dichromate is used as an intensifier in black and white photographic processing. It is used as a pigment and as an insecticide. Potassium dichromate may also be used as a colorimetric reagent for the detection of lead in objects because the two materials react to form bright yellow lead chromate crystals (Odegaard et al 2000). Silver reacts with potassium dichromate to form a red precipitate.
Synonyms and Related Terms
potassium bichromate; red potassium chromate; red potassium chromate; dipotassium dichromate
Soluble in water. Insoluble in ethanol.
|Molecular Weight||mol. wt. = 294.18|
|Refractive Index||1.7202, 1.7380, 1.8197|
|Boiling Point||500 (dec)|
Hazards and Safety
Toxic by ingestion or inhalation. Severely corrosive on contact with hands. Strong oxidizing agent.
Mallinckrodt Baker: MSDS
N.Odegaard, S.Carroll, W.Zimmt, Material Characterization Tests for Objects of Art and Archaeology Archetype Publications, London, 2000, lead p. 70, silver p.82-84.
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- CRC Handbook of Chemistry and Physics, Robert Weast (ed.), CRC Press, Boca Raton, Florida, v. 61, 1980 Comment: ref. index=1.7202, 1.7380, 1.8197