Tanning – A multi-step process at the core of leather production

Leather tanning is the process of modifying animal skins through physical and chemical means to turn hides into leather. Initially developed as a manual and traditional process, leather tanning has eventually evolved into large scale industrial operations, constantly focusing on improving productivity, quality of the finished product and environmental performance. Numerous chemicals are used throughout the different stages of the process, including several inorganic salts produced by BASF.

Examples of applications include:

Ammonium Bicarbonate

  • Pre-dyeing treatment of leather

Ammonium Chloride and Ammonium Sulfate

  • Deliming / buffering process

Sodium Metabisulfite, Sodium Sulfite and Sodium Bisulfite

  • Deliming process, bleaching and emission control of by-product gases

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Inorganics for leather treatment

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Product Packaging Shelf Life
(months)
Appearance Attributes SDS TDS Share
Ammonium Bicarbonate
N Food Grade 25 KG & 50 LB 12 Fine, white crystals with a slight smell of ammonia

Anti-caking agent, 7500-10000 mg/kg MgCO3

NH4HCO3 content min. 99.9

SDS TDS
Industrial Grade 25 KG & 50 LB 12 Fine, white crystals with a slight smell of ammonia

Anti-caking agent, max 1 g/100 g MgCO3

NH4HCO3 content min. 99.0

SDS
H Food Grade 25 KG 12 Fine, white crystals with a slight smell of ammonia

Anti-caking agent, max 3500 mg/kg MgCO3

NH4HCO3 content min. 99.5

SDS TDS
F Food Grade 25 KG 12 Fine, white crystals with a slight smell of ammonia

Anti-caking agent, max 5500 mg/kg MgCO3

NH4HCO3 content min. 99.3

SDS
O Food Grade 25 KG & 50 LB 12 Fine, white crystals with a slight smell of ammonia; tend to cake

Untreated grade without anti-caking agent

NH4HCO3 content min. 99.9

SDS TDS
SH Food Grade 25 KG & 50 LB 12 Fine, white crystals with a slight smell of ammonia

Anti-caking agent up to 5000 ppm

NH4HCO3 content min. 99.3

SDS TDS
Ammonium Chloride
NA Grade 1000 KG, 25 KG 24 White, fine crystalline powder

Technical grade with anti-caking up to 0.05

NH4Cl content min. 99.7

SDS TDS
Sodium Sulfite
Technical Grade 25 KG, 500 KG, 1000 KG, 1250 KG 24 White or slightly yellowish, odorless, fine crystalline powder

Reducing and bleaching agent

Na2SO3 content min 97.5

SDS TDS
Sodium Metabisulfite
Technical Grade 25 KG, 500 KG, 1000 KG, 1250 KG 24 White or slightly yellowish, fine crystalline powder, with an odor of SO2

Low level of impurity and consistency

Na2S2O5 content 97.2 – 100.5

SDS TDS

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