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phenobarbitone
phenocopy
phenocryst
phenocrystic
Phenogamia
Phenogamian
Phenogamic
Phenogamous
phenol
Phenol acid
Phenol alcohol
Phenol aldehyde
phenol red
phenolate
phenolated
phenolic
phenolic plastic
phenolic resin
phenolic urea
phenological
phenologically
phenology
phenolphthalein
phenom
phenomena

Phenol phthalein definitions

Webster's 1913 Dictionary

Phenol alcohol (Chem.), any one of series of derivatives of phenol and carbinol which have the properties of both combined; thus, saligenin is a phenol alcohol. Phenol aldehyde (Chem.), any one of a series of compounds having both phenol and aldehyde properties. Phenol phthalein. See under Phthalein.

Webster's 1913 Dictionary

Phthalein Phthal"e*in, n. [See Phthalic.] (Chem.) One of a series of artificial organic dyes made as condensation products of the phenols with phthalic acid, and well represented by phenol phthale["i]n. Their alkaline solutions are fluorescent. Phenol phthalein, a white or yellowish white crystalline substance made from phthalic acid and phenol. Its solution in alkalies is brilliant red, but is decolorized by acids, and as this reaction is exceedingly delicate it is used as an indicator.



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