APPEARANCE

White colourless crystals

Assay

98.0% - 101.0%

Ph

5.5-7.5

Sulfate

≤500PPM

HEAVY METALS

≤10ppm(as pb)

LOSS ON DRYING

≤0.5%

Aniline

≤1PPM

cardmium

≤2PPM

mercur

≤2PPM

chromium

≤2PPM

ARSENIC (As)

≤3PPM

Lead (Pb)

≤1PPM

SELENIUM(SE)

≤30PPM

CYCLOHEXYLAMINE

≤10ppm

DICYCLOHEXYLAMINE

qualified

transparency

≥95.0%