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Product introduction

Pyrocatechol Violet is a complexometric indicator dye. This phthalein dye chelates metals to form blue to blue-violet complexs. It is also a pH indicator with a transition interval from 0 - 8 (red to violet). It is known to be unstable when alkaline. The stability is improved at a neutral pH. When the pH is between 2-7 the color may be yellow.A complexometric indicator. Pyrocatechol Violet is a complexometric indicator dye. This phthalein dye chelates metals to form blue to blue-violet complexs. It is also a pH indicator with a transition interval from 0 - 8 (red to violet). It is known to be unstable when alkaline. The stability is improved at a neutral pH. When the pH is between 2-7 the color may be yellow. A complexometric indicator.

Specs ⸢ View details ⸥

Chinese name

邻苯二酚紫

English name

Pyrocatechol violet

Chinese alias

儿茶酚紫 | 焦儿茶酚紫 | 邻苯二酚磺酞

English alias

NSC 622476 | Pyrocatechinsulfonephthalein | FT-0623518 | MFCD00005868 | 3H-2, 3,3-bis(3,4-dihydroxyphenyl)-, 1,1-dioxide | AI3-63038 | P0569 | Pyrocatechol,4'-(3H-2,1-benzoxathiol-3-ylidene)di-, S,S-dioxide | 1, 4,4'-(3H-2,1-benzoxathiol-3-ylidene)bis-, S

CAS number

115-41-3

molecular formula

C19H14O7S

molecular weight

386.38 g/mol

Exact mass

指示剂

PSA

133.000 Å²

Logp

2.300

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