Thymol blue, AnalaR NORMAPUR® ACS, Reag. Ph. Eur. indicator

Supplier: VWR Chemicals

Synonyms: Thymolsulphonphthalein, 3,3-Bis(4-hydroxy-5-isopropyl-2-methylphenyl)-3H-benzo[c][1,2]oxathiole 1,1-dioxide

VWRC86155.050EA 136 SGD
VWRC86155.050 VWRC86155.150
Thymol blue, AnalaR NORMAPUR® ACS, Reag. Ph. Eur. indicator
Thymol blue
Formula: C₂₇H₃₀O₅S
MW: 466,6 g/mol
MDL Number: MFCD00005869
CAS Number: 76-61-9

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Specification Test Results

pH Range 1: Pink to Brownish Yellow 1.2 - 2.8
pH Range 2: Greenish-Yellow to Blue 8.0 - 9.2
Absorption Max. λ1 (pH 1.2) 543 - 547
Absorption Max. λ2 (pH 2.8) 431 - 436
Absorption Max. λ3 (pH 7.8) 431 - 436
Absorption Max. λ4 (pH 9.5) 594 - 598
Absorptivity (A1%/1 cm; λ1, pH 1.2 on Dried Sample) 400 - 500
Absorptivity (A1%/1 cm; λ2, pH 2.8 on Dried Sample) 200 - 300
Absorptivity (A1%/1 cm; λ3, pH 7.8 on Dried Sample) 200 - 300
Absorptivity (A1%/1 cm; λ4, pH 9.5 on Dried Sample) 450 - 550
Loss on Drying (110 ºC) ≤3

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