Item

Unit

Enterprise standard

BP2008

USP31

FCC6

E330

GB 19872007

Appearance

colorless crystal or white crystalline powder

Identification

Conforming with the test

Clarity (405nm light transmission)

%

≥98.0

Confor-ming with the test

Confor-ming with the test

Confor-ming with the test

Confor-ming with the test

≥96.0

Assay

%

99.5-100.5

99.5-100.5

99.5-100.5

99.5-100.5

≥99.5

99.5-100.5

Moisture

%

≤0.15

≤1.0

≤1.0

≤0.5

≤0.5

≤0.5

RCS

(1g+10ml) ≤1.40B·U

Not beyond the standard

Not beyond the standard

Not beyond the standard

Not beyond the standard

≤1.0 (Not beyond the standard)

Calcium salt

ppm

≤10

≤200

Iron salt

ppm

≤1

≤5

Chlorides

ppm

≤5

≤50

Sulphates

ppm

≤20

≤150

≤150

≤100

Oxalates

ppm

≤20

≤360

≤360

≤100

≤100

≤100

Heavy metal

ppm

≤1

≤10

≤10

≤5

Lead

ppm

≤0.5

≤0.5

≤1

≤0.5

Arsenic

ppm

≤0.2

≤1

≤1

Aluminium

ppm

≤0.2

≤0.2

≤0.2

Mercury

ppm

≤0.1

≤1

Sulphate ash

%

≤0.03

≤0.1

≤0.1

≤0.05

≤0.05

≤0.05

Insol. in water

Meet the specification

Meet the specification

Bacterial endotoxin

IU/mg

≤0.5

≤0.5

Tridodecylamine

ppm

≤0.1

≤0.1

Whiteness

%

≥82

Granularity

upon clients' requests