User Tools

    To create and edit articles, please register and log-in

Main Menu : categories & index etc.

Main menu
Click categories to expand

A-Z listingplugin-autotooltip__plain plugin-autotooltip_bigA-Z listing

This is an alphabetical index of all content pages.

Other categories



Also see

Importance Ratings
Curator's rationale
AI Policy

Twitter feed 𝕏

Feeds + s.e.o. etc.
rss / xml feed
sitemap file
A-Z listing (archived)

Indexed under : Chemistry

Wikenigma - an Encyclopedia of Unknowns Wikenigma - an Encyclopedia of the Unknown

Sulphur dyes

Sulphur dyes (Sulfur dyes in the US) were at one time the most commonly used textile dyes. They are still the preferred dye type for cellulose based fabrics. They are available in a wide range of colours.

The first widely available sulphur dye was Leuco Sulfur Black 1, which was commercialised over 100 years ago.

In general, the exact chemical structure of the entire group is unknown.

Technical details :

Essentially they are dyes which contain aromatically attached oligo sulfur linkages which are reducible to thiol groups and which may be of oligomeric or polymeric structure. They are mainly obtained by thionation of the respective intermediates at high temperature, for example above 100°C, especially in the temperature range from 1 10 to 300°C (eg by baking or in the melt or in the presence of water and/or an inert organic solvent). The exact structure of sulfur dyes is generally unknown or incompletely known, even though the starting materials are known, since, for example, the number or position of the oligo sulfur linkages, the number of sulfur atoms in an oligo sulfur linkage, the number of hetero rings and/or NH linkages and/or the number of structural repeat units in the sulfur dye molecule may vary according to starting materials and synthetic conditions.

Source : European Patent EP1200669A1

For an overview, see : Wikipedia

    Please share this page to help promote Wikenigma !

Dear reader : Do you have any suggestions for the site's content?

Ideas for new topics, and suggested additions / corrections for older ones, are always welcome.

If you have skills or interests in a particular field, and have suggestions for Wikenigma, get in touch !

Or, if you'd like to become a regular contributor . . . request a login password. Registered users can edit the entire content of the site, and also create new pages.

( The 'Notes for contributors' section in the main menu has further information and guidelines etc.)

Automatic Translation

You are currently viewing an auto-translated version of Wikenigma

Please be aware that no automatic translation engines are 100% accurate, and so the auto-translated content will very probably feature errors and omissions.

Nevertheless, Wikenigma hopes that the translated content will help to attract a wider global audience.

Show another (random) article

Further resources :