Stahl

Phenolic and sulfonic syntans for retanning leather

Stahl’s diverse phenolic and sulfonic syntans are low-formaldehyde retanning agents and are a responsible choice for retannages. The agents can be applied to a large variety of leathers. All our phenolic and sulfonic retanning syntans are part of our sustainable Stahl Neo® portfolio, which means that they comply with the ZDHC MRSL.

ProductTypeMain features
Tanicor® ANCondensation products of aromatic sulphonicFor retanning chrome-tanned leathers that are required for being dyed to full, brilliant shades.
Tanicor® ASSulphone tanning agent that contains aluminiumParticularly recommended for use on automotive leather & all types of corrected-grain leather.
Tanicor® DLECondensation product of aromatic sulphonicPronounced pigmenting action. To obtain leather & furs that are soft and full with a round handle & that can be dyed to very level, brilliant shades.
Tanicor® DLE liqCondensation product of aromatic sulphonicPronounced pigmenting action. To obtain leather and furs that are soft and full with a round handle & that can be dyed to very level, brilliant shades.
Tanicor® DLX-NCondensation product of sulphone and aromatic sulphonic acidsFor wet white and as the sole tanning agent for fine leather such as reptile skins and skivers. White leather & dyed leather with a full, soft handle.
Tanicor® ISCondensation product of organic sulphonic acidsChrome-tanned retanning and tanning agent for chrome-free leather. Effective on automotive leather & upholstery leather.
Tanicor® MLBCondensation product of sulphone and aromatic sulphonic acidsFor milled leathers, high fastness & very fine, even break after milling. Dyeing with very level, intense shades.
Tanicor® MLB liqCondensation product of sulphone and aromatic sulphonic acidsFor milled leathers, high fastness & very fine, even break after milling. Dyeing with very level, intense shades.
Tanicor® NCondensation product of aromatic sulphonic acidsUse for very soft, full handle & vegetable tannages to lighten the color and obtain a softer handle.
Tanicor® SW liqCondensation product of sulphone and aromatic sulphonic acidsPretanning and tanning agent for wet white, especially for automotive leather - Fine, tight grain and can be dyed to brilliant, level shades.
Tanicor® URCondensation product of sulphone and aromatic sulphonic acidsHigh level of fastness, free of formaldehyde. Gives well filled, soft leathers.
Tanicor® UTCondensation product of sulphone and aromatic sulphonic acidsImparts good fullness, a fine tight grain & pleasant handle. Clear & brilliant shades - Easy buffing.
Tanicor® XACondensation product of aromatic sulphonic acidsPronounced pigmenting action. To obtain leathers that are soft and full with a round handle & that can be dyed to very level, brilliant shades.
Relugan® SLFCondensation product of phenolsulfonic acid and organic nitrogenousMild neutralizing & dispersing action - Level shades without lightening colors - Easy buffing - Nubuck & Suede.
Syncotan® MRL liqReplacement Syntan based on PhenolEfficient sammying & shaving of all wet white - Soft leathers with fine, uniform milling pattern.
Tanicor® PWB-INPhenol based whitening syntanPowerful whitening replacement syntan.
Tanicor® RS-31 liqRetanning agent based on sulphoneRetanning of all automotive leathers, especially those based on mineral free or wet-white tannages.
Tanicor® SCU liqAcidic retanning agent based on sulphoneHigh levels of filling along with excellent grain tightness.
Tanicor® SXP liqRetanning agent based on sulphoneRetanning of chrome, vegetable and wet-white leathers where it promotes excellent filling and roundness.


Our phenolic and sulfonic syntan product catalogue contains information on all Tanicor® retanning agents and their properties. You can download the catalogue at the bottom of this page.

Low-formaldehyde retanning with Tanicor® 

Our Tanicor® portfolio includes a variety of low-formaldehyde synthetic retanning agents with high heat- and light-fastness properties. The formaldehyde reduction makes Tanicor® solutions an excellent choice for eco-friendly leather. The portfolio includes solutions for all leather types for different industries.
In particular, Tanicor® AS, Tanicor® IS and Tanicor® SW liquid are very suitable for retanning automotive leathers.

For specialty leathers, Tanicor® DLX-N is ideal for use with fine leathers, such as reptile skins and skivers. It has excellent heat- and light-fastness and bleaching properties, and gives a high degree of filling.

Versatile retanning with Tanicor®

Tanicor® SCU liquid is the recommended choice for tanners looking for excellent grain tightness and the high filling of chrome-free leathers. Other solutions include Tanicor® RS-31 liquid and Tanicor® PWB-IN. Stahl offers Tanicor® RS-31 liquid, a retanning agent based on sulfone, for retanning automotive leathers based on mineral free or wet-white tannages. Tanicor® PWB IN is a powerful whitening replacement syntan with high filling properties. It is suitable for leathers used in shoe upper and leather goods.