Na2S | 50-52% | 60-62% |
Fe in ppm | 30 Max. | 30 Max. |
Na2CO3 | 1.5% Max | 1.5% Max |
Water insoluble | 0.05% Max. | 0.05% Max. |
Used for:
To protect developer solutions from oxidation
As a dechlorinating agent
As a desulfurizing agent
For sulfitization of tanning extracts
As a bleaching agent
As an oxygen scavenger agent
Application areas:
Paper and pulp industry
Leather industry
Photographic industry
Water treatment
Textile industry
Chemical analysis:
Total sulphide as na2s: 60% min
Sodium hydrosulphide as nahs: 2. 5% max
Excess alkali as naoh 2. 00% max
Other reducing compounds as na2s2o3: 2. 00% max
Iron as fe2o3 and aluminum compounds: 0. 002% max
Sulphate as na2s04: 1. 00% max
Chloride as nacl: 1. 00% max
Water insolubles: 0. 20% max
3.6/5
Rated by 12 Users