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.
Soluble in water (60 mg/ml), ethylene glycol monomethyl ether (60 mg/ml), and ethanol (8 mg/ml).
Store at room temperature
185° C (lit.)(dec.)
~1.57 (Predicted) (tautomer)
n20D ~1.70 (Predicted)
pKa: 1, 7.82, 9.76, 11.7
For Research Use Only. Not Intended for Diagnostic or Therapeutic Use.
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