15918

Pyrocatechol Violet

p.a., colorimetric reagent

• Synonym(s): Catechol violet, Pyrocatecholsulfonphthalein
• Empirical Formula (Hill Notation): C₁₉H₁₄O₇S
• CAS Number: 115-41-3
• Molecular Weight: 386.38
• Beilstein: 353938
• EC Number: 204-088-3
• MDL number: MFCD00005868
• UNSPSC Code: 12000000

Properties

• grade: colorimetric reagent; p.a.
• technique(s): titration: suitable
• mp: 185 °C (dec.) (lit.)
• solubility: H₂O: 1 mg/mL, clear, red; 0.1 M acetate buffer pH 4.7: 10 mg/mL, clear, yellow (without a tinge of green)
• SMILES string: Oc1ccc(cc1O)C(=C2\C=CC(=O)C(O)=C2)\c3ccccc3S(O)(=O)=O
• InChI: 1S/C19H14O7S/c20-14-7-5-11(9-16(14)22)19(12-6-8-15(21)17(23)10-12)13-3-1-2-4-18(13)27(24,25)26/h1-10,20,22-23H,(H,24,25,26)/b19-12+
• InChI key: HGPSVOAVAYJEIJ-XDHOZWIPSA-N

Description

Analysis Note

λ_max. 444 nm, E(1%,1 cm) ≥435 (Methylalkohol)

Other Notes

Very sensitive reagent for the determination of Fe(III); Determination of Al(III)