The Structure of the Colourant/Pigment, Carmine Derived from Carminic Acid-Reference-Cited by-同舟云学术

The Structure of the Colourant/Pigment, Carmine Derived from Carminic Acid

Published:2009-07 Issue:7 Volume:2009 Page:407-409
ISSN:1747-5198
Container-title:Journal of Chemical Research
language:en
Short-container-title:Journal of Chemical Research

Author:

Harris Michael¹,Stein Bridget K.²,Tyman John H.P.¹,Williams Christopher M.²

Affiliation:

1. Department of Chemistry, Brunei University, Uxbridge, Middlesex UB8 3PH, UK

2. EPSRC Centre for Mass Spectrometry, Department of Chemistry, University of Wales, Swansea SA2 8PP, UK

Abstract

The colourant/pigment carmine synthesised from carminic acid and calcium and aluminium acetates has been examined chemically and spectroscopically to determine its structure. As with alizarin, it appears probable that the material is a tetramer but composed of four carminic acid units with aluminium involved with the 5,6-dioxy groups in five-membered rings and calcium chelated with the 10-carbonyl group of the anthraquinone system.

Publisher

SAGE Publications

Subject

General Chemistry

Link

http://journals.sagepub.com/doi/pdf/10.3184/030823409X460768

Reference12 articles.

1. Cochineal carmine: an ancient dye with a modern role

2. Metal Complexes of Alizarin IV—The Structure of the Potassium and Calcium Salts of Alizarin and of 3‐Nitroalizarin

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