Items

Standard

Appearance

white crystal

solubility(40%aqueous)

Clear,colorless solution

Content

99.5-101%

Melting point

168.0-172.0℃

Insolubles

≤0.005%

ASH

≤0.05%

Heavy metals

≤5PPM

moisture conten

≤0.3%

PH（5%water）

10.0-11.5

(Colour)

≤5#

Fe

≤1PPM

SO4 2+

≤0.1%

Cl

≤5PPM

UV（280nm）

Abs（280nm,40%water）

≤0.2