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English-Thai Dictionary

phthalein

N กลุ่ม สารประกอบ ที่เกิด จาก การ ใส่ Phthalic anhydride เป็น สาร ย้อมสี

Webster's 1913 Dictionary

PHTHALEIN

Phthal "e *in, n. Etym: [See Phthalic. ] (Chem. )

Defn: One of a series of artificial organic dyes made as condensation products of the phenols with phthalic acid, and well represented by phenol phthaleïn. 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.

Duden Dictionary

Phthalein

Phtha le in Substantiv, Neutrum , das |Phthale i n |das Phthalein; Genitiv: des Phthaleins, Plural: die Phthaleine gebildet aus Naphthalin , dem Grundstoff synthetischer Farbstoff z. B. Eosin