ITEM

SPECIFICATION

RESULTS

Appearance

White crystal

conform

Solubility

Pass test

Pass test

Clarity & color solution

Clear

Clear

Content ,%

99.5 – 101.0

99.68

Sulphate, ppm

≤150

<5

Oxalate, ppm

≤100

<30

Heavy metal (as Pb), ppm

≤5

<2

Barium

Pass

Pass

Calcium, ppm

≤200

<30

Iron, ppm

≤10

<10

Chloride, ppm

≤50

<15

Vitriol ash, %

≤0.05

0.023

Water, %

≤0.5

0.2416

Readily carbonisable substances

Not darker than the standard

Pass test

Lead, ppm

≤0.5

<0.5

As, ppm

≤1

<0.5

Mercury, ppm

≤1

<0.5

Aluminium, ppm

≤0.2

<0.1

Bacteria endotoxic, IU/mg

≤0.5

<0.5

Result

Conform to BP98/FCCIV/E330/USP32