What are S. O. Dyes?

Name: Rajesh

Country or region: India

Message: What is the full-form of S.O. Dyes? What are S.O. Dyes ?

The phrase "S.O. Dyes" is used as an abbreviation for two completely different things.

In general, "S.O. Dyes" is an abbreviation for "Synthetic Organic Dyes". This phrase can refer to any synthetic dye, typically manufactured from chemicals that ultimately derive from either coal or petroleum. Although the popular conception of the word "organic" is that it refers to all-natural, non-synthetic plant or animal products, in fact the word means something very different in chemistry. In chemistry, "organic" means any chemical whose molecules contain carbon, including the chemicals in coal and petroleum, and all of the myriad synthetic products produced from them. 

Among the many types of synthetic organic dyes are reactive, acid, direct, and vat dyes. Synthetic organic dyes are used not only in textile dyeing, but also in coloring printing inks, house paints, paper, foods, and cosmetics. A fascinating overview of synthetic organic dyes and pigments, from the viewpoint of an artist, can be found in Bruce MacEvoy's online guide
to watercolor painting . Also see my earlier blog question and answer, What is the dye used for clothing typically made from?.

Alternatively, and in a much more specialized sense, "S. O. Dyes" can also refer to spirooxazine dyes, which are of great interest for their photochromic properties. Spirooxazine compounds can be used in photochromic lenses that turn dark in the presence of ultraviolet light, and then colorless again in its absence.

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Posted: Sunday - December 26, 2010 at 10:41 AM          

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