Diphenylcarbazide

From CAMEO
Jump to navigation Jump to search

Description

White crystalline powder used for the colorimetric detection of Chromium in metals, tanned Leather, and pigments (Odegaard et al 2000). Diphenylcarbazide gives a dark blue-violet positive reaction. Other metals, such as Cadmium, Mercury, Magnesium, Silver, Nickel, Tin, and Aluminum will also react with diphenylcarbazide.

Chemical structure

Diphenylcarbazide.jpg

Synonyms and Related Terms

2,2'-diphenylcarbonic dihydrazide; 1,5-diphenylcarbazide; S-diphenylcarbazide; DPC

Risks

  • Degrades in light.
  • May be harmful by ingestion or inhalation.
  • Contact may cause irritation.
  • ThermoFisher: SDS

Physical and Chemical Properties

Slightly soluble in water. Soluble in hot alcohol, acetone, glacial acetic acid

Composition C33H14N4O
CAS 140-22-7
Melting Point 168-171 C
Molecular Weight mol. wt. = 242.27

Resources and Citations

  • The Merck Index, Susan Budavari (ed.), Merck Research Labs, Whitehouse Station, NJ, 12th Edition, 1996 Comment: entry 3333
  • N.Odegaard, S.Carroll, W.Zimmt, Material Characterization Tests for Objects of Art and Archaeology, Archetype Publications, London, 2000, p.44.