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HomeProduct name listDIPHENYLCARBAZONE

DIPHENYLCARBAZONE

  • CAS NO.:538-62-5
  • Empirical Formula: C13H12N4O
  • Molecular Weight: 240.26
  • MDL number: MFCD00003024
  • EINECS: 208-698-0
  • SAFETY DATA SHEET (SDS)
  • Update Date: 2023-04-23 13:52:06
DIPHENYLCARBAZONE Structural

What is DIPHENYLCARBAZONE?

Chemical properties

orange powder

The Uses of DIPHENYLCARBAZONE

Indicator

The Uses of DIPHENYLCARBAZONE

As a sensitive reagent for Hg, with which it gives a blue color.

The Uses of DIPHENYLCARBAZONE

It is a reagent for mercury determination.

Purification Methods

It crystallises from EtOH (ca 5mL/g), and dry the orange-red needles at 50o. A commercial sample, nominally sym-diphenylcarbazone (m 154-156o) was a mixture of diphenylcarbazide and diphenylcarbazone. The former was removed by dissolving 5g of the crude material in 75mL of warm EtOH, then adding 25g Na2CO3 dissolved in 400mL of distilled water. The alkaline solution was cooled and extracted six times with 50mL portions of diethyl ether (discarded). Diphenylcarbazone was then precipitated by acidifying the alkaline solution with 3M HNO3 or glacial acetic acid. It was filtered off, air dried, and stored in the dark [Gerlach & Frazier Anal Chem 30 1142 1958]. Other impurities are phenylsemicarbazide and diphenylcarbodiazone. Impurities can be detected by chromatography [Willems et al. Anal Chim Acta 51 544 1970]. It is used for detection and estimation of Hg, Zn, Cd, Cr, Cu, Fe and Mo [Cheng et al. Handbook of Organic Analytical Reagents, Boca Baton 277 1982, Beilstein 16 H 24, 16 IV 17.]

Properties of DIPHENYLCARBAZONE

Melting point: 119-123 °C(lit.)
Boiling point: 382.98°C (rough estimate)
Density  1.19±0.1 g/cm3 (20 ºC 760 Torr)
refractive index  1.6120 (estimate)
storage temp.  2-8°C
solubility  DMSO (Slightly), Methanol (Slightly)
form  Powder
pka 9.83±0.43(Predicted)
color  Orange
Water Solubility  Soluble in acetone. Insoluble in water.
Merck  14,3322
CAS DataBase Reference 538-62-5(CAS DataBase Reference)
EPA Substance Registry System Diazenecarboxylic acid, phenyl-, 2-phenylhydrazide (538-62-5)

Safety information for DIPHENYLCARBAZONE

Signal word Warning
Pictogram(s)
ghs
Exclamation Mark
Irritant
GHS07
GHS Hazard Statements H315:Skin corrosion/irritation
H319:Serious eye damage/eye irritation
Precautionary Statement Codes P264:Wash hands thoroughly after handling.
P264:Wash skin thouroughly after handling.
P280:Wear protective gloves/protective clothing/eye protection/face protection.

Computed Descriptors for DIPHENYLCARBAZONE

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