ISSN:
0030-493X
Keywords:
Chemistry
;
Analytical Chemistry and Spectroscopy
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Notes:
A number of impurities have been extracted from yellow phenolphthalein by thin layer chromatography and characterized on the basis of their mass spectra. One of these by-products appears to be fluoran while the structure proposed for a second accounts for the properties ascribed to it by previous investigations. The bulk of the impurity appears to consist of condensation products of three molecules of phenol with two of phthalic anhydride.
Additional Material:
14 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/oms.1210040133