melting point

79.0~82.0

80.5~81.5

appearance of solution

by6

by6

acidity

qualified

qualified

related substance

impurity a ≤ 0.1%

no found

impurity b ≤0.1%

no found

impurity c ≤ 0.2%

no found

any other impurity≤0.1%

0.06%

total impurities ≤0.5%

0.10%

halogens

≤100ppm

100ppm

sulphates

≤100ppm

100ppm

heavy metals(pb)

≤20ppm

20ppm

loss on drying

≤0.5%

0.10%

sulphated ash

≤0.1%

0.06%

content

98.5-101.0%

99.3%