Deliming Agents

Purgamin ANF

nitrogen-free deliming agent

Chemical composition

ammonium salt-free blend of inorganic acids and salts


coarse - grained, white - yellow powder

pH - value (1:10)

2.5 - 3.0


stable to acids and salts under usual tannery conditions


added undissolved

Field of application

Used in the deliming process to remove the lime and adjust the pH for the bating process.



  • acids dissolve slowly, so no acid swelling must be feared
  • due to nitrogen-free raw materials, no ammonium is brouhgt into the waste water by the deliming
  • gives light pelts and leathers with fine grain
  • even deliming effect and a complete removal of the lime is achieved
  • chrome exhaustion during tanning is supported



      Purgamin ANF is added undissolved. It may be used in normal floats but also in so-called dry deliming. Applied quantities depend on the thickness and the lime content of the pelts and are between 0.5 % and 2.0 %.

      Nitrogen content of the waste water after deliming with ammonium sulphate and ammonium sulphate containing bating agent: 3.000 - 5.000 mg/l. Nitrogen content of the waste water after deliming with Purgamin ANF and bating with Purgazym 50: 100 - 300 mg/l


      Purgamin ANF is a technical product and variations in colour can happen. The properties for application are not touched by this.

      Storage temperature

      Storage at temperatures between 5 °C and 40 °C.

      Shelf life

      Up to 12 months in the original sealed packing.


      Storage under dry conditions and protected from sun.

      This information and our technical advice - whether verbal, in writing or by way of trials - are given in good faith but without warranty, and this also applies where proprietary rights of third parties are involved. Our advice does not release you from the obligation to check its validity and to test our products as to their suitability for the intended processes and uses. The application, use and processing of our products and the products manufactured by you on the basis of our technical advice are beyond our control and, therefore, entirely your own responsibility. Our products are sold in accordance with our General Conditions of Sale and Delivery.

      Download Technical Data Sheet