High-class products

First-class products

Acceptable end-product

Appearance(Visual inspection)

Grayish-white, light yellow powder or granules

Initial M.P,^oC     ≥

99.0

98.0

97.0

Loss on drying,%       ≤

0.20

0.30

0.50

Ash, %                ≤

0.20

0.30

0.40

Residue,%       ≤

0.00

0.05

0.10

In soluble in Methanol,%  ≤   

0.50

0.50

0.80

Purity,%             ≥

97.0

96.0

Free amine,%    ≤

0.50