Retanning Agent


Eco-friendly Filling and Retanning agent

DOWELLTAN ST64 is a synthetic retanning agent without free formaldehyde. 

Chemical & Physical Data:   

Appearance:            Light yellow to brown powder

pH(10%):                 4.5~6.5

Solid Content/%:      ≥93.0


lDOWELLTAN ST64 is recommended to be used for leather products with strict requirements on formaldehyde content.

lDOWELLTAN ST64 is able to penetrate effectively through the skin, and it is mainly deposited in the loosely structured areas.

lDOWELLTAN ST64 has been specially developed for use on leather that is expected to have a tight grain and a full, soft handle.

lDOWELLTAN ST64 imparts very good buffing property.


lDOWELLTAN ST64 can be used for post-neutralization retanning filling, and together with other anionic retanning agents and dyes.

lSuggested dosage: 4-8 % (based on shaved weight).


This product has no dangerous information. If splashed into eyes,immediately wash with plenty of water.


20KG kraft paper bag


1 year storage in sealed original package at 5-35℃. Bags should be tightly resealed each time after material is taken from them, and their contents should be used up as soon as possible after they have been opened. Direct contact with this product may irritate skin and mucous membrane, rinse with running water if contacted with skin. Non-dangerous chemical.