ITEM

STANDARD

RESULTS

Characteristics

White crystalline Powder: freely soluble in water,

Practically Insoluble in ethanol.

Conformity

Identification

Positive

Positive

Appearance of solution

Solution S is clear and colourless

Conformity

Acidity or alkalinity

Must comply with USP27

Conformity

Bromides

Not more than 0.010%

0.0054%

Iodides

The substance show no blue colour

Conformity

Aluminum

Not more than 0.2μg/g

Guarantee qualified

Magnesium and

alkaline-earth metals

Not more than 0.01% (as Ca)

Conformity

Arsenic

Not more than 1μg /g

Conformity

Iron

Not more than 2μg /g

Conformity

Barium

Must comply with USP27

Conformity

Ferro cyanides

No blue colour develops with 10 min

Conformity

Sulphates

Not more than 0.020%

Conformity

Nitrites

Not more than 0.01

0

Phosphates

Not more than 0.0025%

Conformity

Potassium

Not more than 0.05%

Conformity

Heavy metals

Not more than 5ppm

Conformity

Loss on drying

Not more than 0.5%(105°C,2h)

0.03%

Assay

99.0%-100.5%

100.1%