Chemical constitutions in the Colour Index™: A century of colourant classification

Abstract

This article details how the Colour Index™ (CI) system categorises and unambiguously labels commercial dyes and pigments based upon their chemical constitutions. It outlines the current process by which colourants that are new to the market find a place within CI and acquire generic identifiers. The contents of this paper will enable both experienced users of CI and those who are unfamiliar with the resource to gain not only a detailed understanding of its classification system, but also a deeper appreciation of what colourant designations signify and how they are correctly utilised.

Separation of Polyamide 66 From Blends With Wool Through Selective Dissolution: Implications of the Presence of Dyes

“…Acid Black 172, CAS Registry Number 57693-14-8). The aim was to perform experiments with dye formulations of commercial relevance at the present time, and often, the identity of chromophores in such formulations is held as proprietary information [12].…”

Separation of Polyamide 66 From Blends With Wool Through Selective Dissolution: Implications of the Presence of Dyes

“…Acid Black 172, CAS Registry Number 57693-14-8). The aim was to perform experiments with dye formulations of commercial relevance at the present time, and often, the identity of chromophores in such formulations is held as proprietary information [12].…”

Sunlight-Activated Photocatalytic Degradation of Azo Dyes Using Talipariti tiliaceum L.-Mediated Silver Nano-Photocatalyst: A Sustainable Approach to Environmental Remediation

“…Currently, the world utilizes almost 10,000 commercial dyes and pigments annually [4]. Acridine dyes, aryl methane dyes, azine dyes, azo dyes, carbonyl dyes, nitro dyes, nitroso dyes, oxazine dyes, thiazine dyes, and xanthene dyes are some examples of dyes that are classified based on their chemical structure [5].…”

Separation of Polyamide 66 From Blends With Wool Through Selective Dissolution: Implications of the Presence of Dyes

“…Acid Black 172, CAS Registry Number 57693-14-8). The aim was to perform experiments with dye formulations of commercial relevance at the present time, and often, the identity of chromophores in such formulations is held as proprietary information [12].…”

Sunlight-Activated Photocatalytic Degradation of Azo Dyes Using Talipariti tiliaceum L.-Mediated Silver Nano-Photocatalyst: A Sustainable Approach to Environmental Remediation

“…Currently, the world utilizes almost 10,000 commercial dyes and pigments annually [4]. Acridine dyes, aryl methane dyes, azine dyes, azo dyes, carbonyl dyes, nitro dyes, nitroso dyes, oxazine dyes, thiazine dyes, and xanthene dyes are some examples of dyes that are classified based on their chemical structure [5].…”

Separation of Polyamide 66 From Blends With Wool Through Selective Dissolution: Implications of the Presence of Dyes

“…Acid Black 172, CAS Registry Number 57693-14-8). The aim was to perform experiments with dye formulations of commercial relevance at the present time, and often, the identity of chromophores in such formulations is held as proprietary information [12].…”

Sunlight-Activated Photocatalytic Degradation of Azo Dyes Using Talipariti tiliaceum L.-Mediated Silver Nano-Photocatalyst: A Sustainable Approach to Environmental Remediation

“…Currently, the world utilizes almost 10,000 commercial dyes and pigments annually [4]. Acridine dyes, aryl methane dyes, azine dyes, azo dyes, carbonyl dyes, nitro dyes, nitroso dyes, oxazine dyes, thiazine dyes, and xanthene dyes are some examples of dyes that are classified based on their chemical structure [5].…”