Chlorophenol red, pure indicator grade

Supplier: Thermo Scientific
Warning

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

190040100 190040500
ACRO190040100EA 81.4 EUR
ACRO190040100 ACRO190040500
Chlorophenol red, pure indicator grade
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

Appearance Green to red-brown to brown Powder
Infrared spectrum Conforms
Loss on drying ≤8 % (110°C)
Solubility (0.1 % in ethanol) Clear brown-yellow to dark orange
UV Lambda max 572 to 576 nm (in 0.1 N NaOH)
Specific absorbance A (1%/1cm) ≥1000 (at Lambda max) On dried substance
Visual transition interval from pH 4.8 (yellow) to pH 6.4 (purple)

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