ITEM

STANDARD

RESULTS

Appearance

White powder

Conforms

Assay (on dried basis)

99.0-100.5%

99.9%

pH (10% Solution)

6.0- 9.0

7.0

Loss on drying (155°C, 4h)

≤ 11.0%

3.6%

Water insoluble matter

≤ 0.3%

0.07%

Formic acid, formates and other oxidizable

substances (as formic acid)

≤ 0.1%

< 0.1%

Arsenic (As)

≤ 3 mg/kg

< 3 mg/kg

Lead (Pb)

≤ 5 mg/kg

< 5 mg/kg

Mercury (Hg)

≤ 1 mg/kg

< 1 mg/kg

Heavy metals

≤ 10 mg/kg

< 10 mg/kg

Chlorides (Cl)

≤ 0.05%

< 0.05%

Sulfate (SO₄)

≤ 0.06%

< 0.06%

Nitrate (NO₃)

Pass test

Pass test

Organic volatile impurities

Pass test

Pass test