Chlorophenol red, AnalaR NORMAPUR® indicator

Supplier: VWR Chemicals

Synonyms: 4,4'-(3H-2,1-Benzoxathiol-3-ylidene)bis[2-chlorophenol] S,S-dioxide3,3-Bis(3-chloro-4-hydroxyphenyl)-3H-benzo[c][1,2]oxathiole 1,1-dioxide

85921.100EA 34.4 GBP
85921.100 85921.130
Chlorophenol red, AnalaR NORMAPUR® indicator
Chlorophenol red
Formula: C₁₉H₁₂Cl₂O₅S
MW: 423,27 g/mol
Melting Pt: ∼261 °C
Storage Temperature: Ambient
MDL Number: MFCD00005877
CAS Number: 4430-20-0
EINECS: 224-619-2

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Specification Test Results

Green to red-brown to brown powder Passes test
Solubility in ethanol (0.1 %) Clear solution
Visual transition interval pH 4.8 - pH 6.4
Loss on drying ≤ 8.0 %
Absorption max. λ (0.1 mol/l NaOH) 572 - 575 nm
Absorptivity (1 %; 1 cm; λmax) ≥ 1000

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