ALPHA-BENZOIN OXIME Property

Melting point:

153-155 °C(lit.)

solubility 

ethanol: 0.1 g/mL, clear

form 

White crystalline material which turns grey on exposure to light. Melting point 149-151°C

Safety

Safety Statements 

22-24/25

WGK Germany 

3

RTECS 

DI1750000

F 

8

Hazard and Precautionary Statements (GHS)

ALPHA-BENZOIN OXIME Chemical Properties,Usage,Production

Chemical Properties

Solid.

Uses

Organic intermediates and photographic chemicals, analytical reagent for determination of metals.

Uses

a-Benzoinoxime is used most frequently for the determination of copper(II), but it gives highly stable complexes with molybdenum(VI), tungsten(VI) and vanadium(V), which are insoluble in water and can be extracted with chloroform.
Copper can be quantitatively precipitated from hot solutions containing ammonium hydroxide or sodium tartrate. The excess reagent ensures the quantitative precipitation of the copper but it requires careful work to avoid contamination of the precipitate by the excess of the reagent. Hence combined solvent extraction-spectrophotometric measurements have proved more suitable than the gravimetric method. The absorption maximum of the copper chelate in chloroform solution is at 440 nm.