Color index

The Colour Index International is a reference database which is maintained by the Society of Dyers and Colourists and the American Association of Textile Chemists and Colorists (12). The color index was first published in 1925. Nowadays, it is published exclusively on the internet. 

The color index is a reference database for manufactured color 

A detailed record of products available on the market is presented under each color index reference. Each product name is listed the manufacturer, physical form, principal usages and comments supplied by the manufacturer to guide prospective customers. 

The color index numbers are grouped into ranges according to the chemical structure, as shown in Table 4.1. Sometimes an even more detailed classification is given. 

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Color Index (Cl) name CAS Registry Number Cl constitution number Pigment class (common name) Method of preparation... 

The color of TSR L is measured with a Lovibond Comparator using methods outlined in the relevant International Standard (16). Raw mbber is molded into a disk 1.6 mm thick, and the color is compared and matched with that of standard glass disks. These glass disks provide a color index scale in which the higher index values correspond to darker colors. Generally the specification for TSR L is a maximum Lovibond individual value of 6 and range... 

ISO 4660, Bubber, Bjaw Natural—Color Index Test, International Organization for Standardization, Geneva, Switzerland, 1991. 

Type of Industry Wastewater TOC or phenol, mg/L, or color index Average removal, % Carbon usage nkg/10 L... 

Color Index name FDA names CAS Registry Number Color Index number... 

Chemical classification is based on chromogen. For example, nitro dyes have the chromophore -NOj. The Color Index (C.I.), published by the Society of Dyers... 

Food legislation in the US was implemented in 1938 and since then has been improved dynamically. The Food, Drug and Cosmetic Act classified specific colorants to be used in food and non-food products (FD C colorants). Each colorant has a color index (Cl) number and Cl name. Colorants are also identified by their Chemical Abstract Service (CAS) registry code numbers. The two groups are Certifiable Colorants and Exempt Colorants. 

Food Colorant Color CAS Color Index EU Code EU Status FDA Code FDA Status JECFA Status... 

The color index (Cl) number, developed by the society of dyers and colorists, is used for dye classification. Once the chemical structure of a dye is known, a fivedigit Cl number is assigned to it. The first word is the dye classification and the second word is the hue or shade of the dye. For example, Cl Acid Yellow 36 (Cl 13065) is a yellow dye of the acid type. Additionally, a dye mixture may consist of several dyes for example, Navy 106 is composed of three reactive azo dyes remazol black B (Reactive Black 5), Remazol Red RB (Reactive Red 198), and Remazol Golden Yellow 3. 

Color Index Name Temperature effect in CIELAB units Fastness to overpainting on a fastness scale from 1 to 5 Bleed resistance on a fastness scale from 1 to 5... 

P.O.l has lost most of its commercial significance. Its shade is a very reddish yellow the Color Index classifies it as a yellowish orange. Resistance to organic solvents is very low. P.O.l dissolves more easily in common organic solvents than do other monoazo orange pigments, and it is also less lightfast. 

A Japanese product like P.V.50, the pigment is registered in the Color Index as P.V.44. The two pigments are extremely similar, both coloristically and in terms of performance in application, even in detail. It is very likely that the products are chemically identical and listed twice in the Colour Index, although exhibiting different CAS numbers. 

The chemical structure of P.Y.148, a greenish yellow pigment is listed in the Color Index under Constitution Number 59020 ... 

The influence of detergents was examined, for example, by Friede-NAUER and Berlet (1989) Anal Biochem 178 263 C.I. Color Index, international system for identification of chemical dyes... 

Dye Staining of Proteins Nucleic acids Color index... 

The Society of Dyers and Colourists. Color Index, 2nd ed. The Amer. Assoc, of Textile Chem. and Colorists, Lowell Techn. Inst., Lowell, Massachusetts, 1956. 

Type Color Index Number Color Index Pigment VOSSEN BLAU 705 77510 27 VOSSEN BLAU 705 LS8 77510 27 VOSSEN BLAU 724 77510 27 MANOX Blue 460 D 77510 27 MANOX EASISPERSE HSB 2 77510 27... 

Clark, E.A. and P. Anliker in 0. Hutzinger, ed., Organic Dyes and Pigments, The Handbook of Environmental Chemistry, Vol. 3, Springer-Verlag, Berlin, 1980, Color Index, 3rd Edition, Vol, 4, The Society of Dyers and Colourists, Bradford, Yorkshire, England American Association of Textile Chemists and Colorists, Research Triangle Park, NC,... 

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