Agent Name

Phenol red

Alternative Name

Phenolsulfonphthalein

CAS Number

143-74-8

Formula

C19-H14-O5-S

Major Category

Dyes

Synonyms

Phenolsulfonphthalein; 3H-2,1-Benzoxathiole, 3,3-bis(4-hydroxyphenyl)-, 1,1-dioxide; 4,4'-(3H-2,1-Benzoxathiol-3-ylidene)diphenol S,S-dioxide; Fenolipuna; PSP; PSP (indicator); Phenol Red; Phenol, 4,4-(3H-2,1-benzoxathiol-3-ylidene)di-, S-S-dioxide; Phenolsulfonphthalein; Phenolsulphonphthalein; Sulfonphthal; Sulphental; Sulphonthal; [ChemIDplus]

Category

Indicator Dyes

Description

Odorless, red solid; Available as pure compound, soluble monosodium salt, and dilute solutions; [CHEMINFO]

Sources/Uses

Used as a pH indicator and marker of kidney function and other physiological functions; [CHEMINFO] Used as a pH indicator for the pH range of 6.4-8.2; [Ullmann]

Comments

Dust may be irritating if inhaled; [CHEMINFO]

Exposure Assessment
Vapor Pressure

6.22E-13 mm Hg

Explanatory Notes

mp = >572 deg F; VP = probably near zero; [CHEMINFO]

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