Specifications

Appearance White, free flowing crystalline powder, free from visible contamination
Acid Number(mg KOH/g) 675 + 2
4-Carboxybenzaldehyde (ppm w/w) Max 25
Combined p-toluic acid & 4-Carboxybenzaldehyde (ppm w/w) Max 190
Benzoic acid (ppm w/w) Max 30
Al,Ca,Co,Cr,Fe,K,Mg,Mn,Na,Ni,Ti,(ppm w/w) None greater than 1 and in total max 4
Water (% pct w/w) Max 0.15
Ash (ppm w/w) Max 6
Millipore Min 0.90
Appearance compared with standard Acceptable
b* colour 0.4 – 1.2
Typical Physical Properties
Molecular weight 166.30
Melting Point in sealed tube (°C) 425 (sublimation occurs above 300°C at atmospheric pressure).
Solubility 1 part in 67,000 parts water at 10 °C. Partially soluble in dimethyl formamide and pyridine.
Typical median particle size range (micron) 130 ± 25
Typical bulk density g/ml (DIN 53194) 1.12
Typical angle of repose (degrees) (poured) Poured 40