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http://nopr.niscair.res.in/handle/123456789/8109
Title: | Dye |
Issue Date: | Aug-2005 |
Publisher: | CSIR |
Abstract: | Lac, a natural resin of insect origin, is used extensively for natural food additives, cosmetics and as a colorant for silk and cotton dyeing. Lac dye, which is the soluble part of stick lac, is composed mainly of two major anthraquinone-based components: laccaic acids A and B; the minor components, laccaic acids C, D and E, have also been isolated. The UV–VIS spectrum of laccaic acid A is very similar to the spectrum of crude laccaic acid in ethanol, with absorption maxima for laccaic acid A reported at 290, 340, 500 and 530 nm in this solvent; in water, λmax values were reported at 292 and 490nm and at 500nm in acetone for this acid (referred to as laccaic acid. |
Page(s): | 283 |
URI: | http://hdl.handle.net/123456789/8109 |
ISSN: | 0975-1092 (Online); 0972-592X (Print) |
Appears in Collections: | NPR Vol.4(4) [July-August 2005] |
Files in This Item:
File | Description | Size | Format | |
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NPR 4(4) 283-283.pdf | 172.6 kB | Adobe PDF | View/Open |
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