Agent Name

Thymol blue

CAS Number

76-61-9

Formula

C27-H30-O5-S

Major Category

Dyes

Synonyms

Phenol, 4,4'-(3H-2,1-benzoxathiol-3-ylidene)bis(5-methyl-2-(1-methylethyl)-, S,S-dioxide; Thymol Blue; Thymolsulfonephalein; Thymolsulfonephthalein; Thymolsulfophthalein; Thymolsulphonphthalein; Thymosulfonphthalein; [ChemIDplus]

Category

Indicator Dyes

Description

Brownish-green crystals available as pure compound, soluble monosodium salt, and dilute solutions; [CHEMINFO]

Sources/Uses

A sulfonphthalein dye used as a pH indicator; [CHEMINFO] Used as a pH indicator for the pH range of 1.2-2.8 and 8.0-9.6; [Ullmann]

Comments

Dust may be irritating; [CHEMINFO]

Exposure Assessment
Explanatory Notes

mp = 430-435 deg F; VP = probably negligible; [CHEMINFO]

Links to Other NLM Databases
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Chemical Information

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Other Information

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