phenol phthalein
See also: phenolphthalein and Phenolphthalein
English
Noun
phenol phthalein (uncountable)
- (chemistry) A white or yellowish-white crystalline substance made from phthalic acid and phenol. Its solution in alkalis is brilliant red, but is decolorized by acids, and as this reaction is exceedingly delicate it is used as an indicator.
Part or all of this entry has been imported from the 1913 edition of Webster’s Dictionary, which is now free of copyright and hence in the public domain. The imported definitions may be significantly out of date, and any more recent senses may be completely missing.
(See the entry for “phenol phthalein”, in Webster’s Revised Unabridged Dictionary, Springfield, Mass.: G. & C. Merriam, 1913, →OCLC.)