Phenol red sodium salt, AnalaR NORMAPUR® ACS indicator

Supplier: VWR Chemicals

Synonyms: 3,3-Bis(4-hydroxyphenyl)-3H-benzo[c][1,2]oxathiole 1,1-dioxide, sodium salt, Phenol red water soluble, Sodium hydrogen 4,4'-(3H-2,1-benzoxathiol-3-ylidene)bisphenolate S,S-dioxide

VWRC85920.130EA 39 SGD
VWRC85920.130 VWRC85920.100
Phenol red sodium salt, AnalaR NORMAPUR® ACS indicator
Phenol red sodium salt
Formula: C₁₉H₁₃NaO₅S
MW: 376,35 g/mol
MDL Number: MFCD00066901
CAS Number: 34487-61-1

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Specification Test Results

Appearance Dark red to brown powder
Visual transition interval pH 6.5 - pH 8.2
Loss on drying (110°C) ≤ 5 %
Absorption max. λ 1 (pH 6.5) 430 - 435 nm
Absorption max. λ 2 (pH 8.2) 557 - 560 nm

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