4,4′-(1,1-dioxido-3H-2,1-benzoxathiol-3-ylidene)bis(2-methylphenol)
Brownish yellow powder.
Transition Range: pH 6.5 to pH 8.8. (Yellow to Purple)
Absorptivity 1%
At L max. 435.0 NM: (pH 6.5) – 490 to 540
At L max. 573.0 NM: (pH 8.5) – 1,000 to 1,100
Solubility: Clear yellow solution. (0.1% EtOH)
Loss on Drying: 3.0% max. at 110.0C.
Assay: 95.0% min
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