Roksol ST4A is an anionic auxiliary agent used in tanning. It is used to lubricate leather, mainly in chrome tanning. The product is a mixture of anionic emulsifiers and aliphatic compounds containing carboxyl groups. Its commercial form is an O/W type emulsion (oil in water), beige to brown in colour, with a tendency to delaminate. Due to the solidification point (below -5°C), the product does not require special storage and transport conditions.
Roksol ST4A is resistant to acids, alkalis and electrolytes. It is characterized by limited ability to mix with tanning salts of chromium and aluminium. The product has the ability to emulsify crude, natural and mineral fats. In addition, it can be mixed with all anionic and non-ionic lubricants. It is also possible to prepare so-called multi-charged compositions with the use of Roksol ST4A and cationic fats, e.g. Roksol ST3K. Its ability to mix with clearly cationic or anionic compounds (syntans, vegetable tanning agents) depends on the conditions and needs to be verified in each case.
The product is resistant to oxidation and sunlight. It has a high softening effect on the chrome tanned leather as well as moderate equalising and hydrophobic properties. Its moderate equalising effect enables obtaining pure and vivid colours when dyeing skins with anionic dyes.
Mixture of anionic emulsifiers, reaction products of tallow with diethanolamine and maleic anhydride, aliphatic hydrocarbons and substances containing carboxyl groups
Mixture of anionic emulsifiers, fatty acids ethanolamides and aliphatic hydrocarbons and compounds containing carboxyl groups.
Manufacturer: PCC Exol SA
PCC EXOL SA is one of the most important manufacturers of surfactants and chemical formulations in Central and Eastern Europe. The company offers surfactants, specialist additives and chemical formulations for many branches of industry.
All the above information related to the product are provided according to the best knowledge of the manufacturer and published in good faith. However, the manufacturer does not guarantee the information and contents of this document are complete and accurate, and shall not be liable for the results of using them. The user is obliged to verify and confirm the information and contents of this documentation on his/her own. The manufacturer reserves the right to change the content of this document at any time without stating reasons of such changes.
ISO 14001 
ISO 50001 
ISO 9001 
ISO 45001 
