Sodium sulfide leathering

ITEM STANDARD STANDARD I STANDARD II STANDARD III STANDARD STANDARD Fe 10ppm max 20ppm max 30ppm max 80ppm max 150ppm max 1500ppm max Na2S 60%min 60%min. 60%min. 60%min. 60%min. 60%min. Water insolubles 0.03%max 0.10%max. 0.18%max. 0.20%max. 0.30%max. 0.40%max. Na2CO3 1.80%max 1.80%max. 1.80%max. 2.00%max. 3.00%max. 5.00%max. Na2SO3 1.00%max 1.80%max. 1.80%max. 2.00%max. 2.00%max. 2.00%max. Na2S2O3 2.00%max 2.00%max. 2.00%max. 2.00%max. 2.00%max. 2.00%max. Colour Yellow RED 1. Sodium sulphide is used in Leather or tanning for removing hair from hides and skins. 2. Used in synthetic organic intermediate and preparation of sulfur dye additives . 3. In textile industry as a bleaching, as a desulfurizing and as a dechlorinating agent, 4. Used in pulp and paper industry. 5. Sodium sulphide is used in water treatment as an oxygen scavenger agent. 6. In the photographic industry to protect developer solutions from oxidation. 7. It is used in the production of rubber chemicals and other chemical compounds. 8. It is use in other applications include ore flotation, oil recovery, food preservative, making dyes, and detergent. 9. Sodium sulfide is used in mining industry as inhibitor , curing agent , removing agent.