Affordable Access

Publisher Website

Structural identification of an FD&C red no. 40 contaminant

Authors
Journal
Dyes and Pigments
0143-7208
Publisher
Elsevier
Publication Date
Volume
19
Issue
4
Identifiers
DOI: 10.1016/0143-7208(92)80033-j

Abstract

Abstract NMR and mass spectral experiments have resulted in the determination of structure and assignment of carbon NMR signals of a manufacturing impurity of FD&C Red No. 40. Mass spectrometry showed its molecular weight to he 270, with a base peak of 228. A variety of two-dimensional NMR techniques demonstrated that this compound is a benzonaphthobicyclo-[2.2.2]octanone, which may arise from the Diels-Alder reaction of a naphthyl-benzyne species with 2-naphthol.

There are no comments yet on this publication. Be the first to share your thoughts.

Statistics

Seen <100 times
0 Comments

More articles like this

Structural, electronic, and magnetic properties of...

on Journal of Molecular Graphics... Jan 01, 2008
More articles like this..