Items

Standard

Appearance

Brown liquid

Insoluble Salts (%max)

0.01

Soluble Iron (%max)

0.0001

Free Sulphur (%min)

14.5

Sodium Thiosulphate (%max)

14.0

Sodium Sulphide (%max)

13.5

Ratio of Polysulphide to Sulphide Sulphur

3.6-4.7