Pyrocatechol violet

Base Information

• Chemical Name: Pyrocatechol violet
• CAS No.: 115-41-3
• Deprecated CAS: 3117-41-7,51433-99-9,68943-33-9,387360-51-2,401599-91-5,682345-39-7,720671-79-4,387360-51-2,401599-91-5,51433-99-9,682345-39-7,68943-33-9,720671-79-4
• Molecular Formula: C19H14O7S
• Molecular Weight: 386.382
• Hs Code.: 32041900
• European Community (EC) Number: 204-088-3,680-592-0
• NSC Number: 8805
• DSSTox Substance ID: DTXSID8059429
• Nikkaji Number: J10.593G
• Wikidata: Q910031
• Mol file: 115-41-3.mol

Synonyms:pyrocatechol violet

Chemical Property of Pyrocatechol violet

Chemical Property:

• Appearance/Colour: greenish yellow powder
• Melting Point: 185 °C (dec.)(lit.)
• Refractive Index: 1.737
• Boiling Point: 659.5 °C at 760 mmHg
• PKA: 7.21±0.10(Predicted)
• Flash Point: 352.7 °C
• Density: 1.632 g/cm³
• Storage Temp.: -20°C Freezer, Under inert atmosphere
• Solubility.: H2O: 1 mg/mL, clear, red
• Water Solubility.: Soluble in water, ethylene glycol, monomethyl ether and ethanol.
• XLogP3: 2.3
• Hydrogen Bond Donor Count: 4
• Hydrogen Bond Acceptor Count: 7
• Rotatable Bond Count: 2
• Exact Mass: 386.04602395
• Heavy Atom Count: 27
• Complexity: 619

Purity/Quality:

99% ^*data from raw suppliers

Catechol Violet ^*data from reagent suppliers

Safty Information:

• Statements: 36/37/38
• Safety Statements: 24/25

MSDS Files:

SDS file from LookChem

Total 1 MSDS from other Authors

Useful:

• Chemical Classes: Dyes -> Indicator Dyes
• Canonical SMILES: C1=CC=C2C(=C1)C(OS2(=O)=O)(C3=CC(=C(C=C3)O)O)C4=CC(=C(C=C4)O)O
• Uses: 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. Dyes and metabolites.

Technology Process of Pyrocatechol violet

There total 2 articles about Pyrocatechol violet which guide to synthetic route it. The literature collected by LookChem mainly comes from the sharing of users and the free literature resources found by Internet computing technology. We keep the original model of the professional version of literature to make it easier and faster for users to retrieve and use. At the same time, we analyze and calculate the most feasible synthesis route with the highest yield for your reference as below:

synthetic route:

Reference yield: 29.0%

2-sulfobenzoic acid cyclic anhydride (81-08-3) + benzene-1,2-diol (120-80-9,19481-10-8,37349-32-9) → pyrocatechol violet (115-41-3,3117-41-7)

Guidance literature:

In phosphoric acid; for 0.00333333h; Microwave irradiation;

DOI:10.1135/cccc20021779

Reference yield:

benzene-1,2-diol (120-80-9,19481-10-8,37349-32-9) → pyrocatechol violet (115-41-3,3117-41-7)

Guidance literature:

at 110 ℃;

Reference yield:

TALH + pyrocatechol violet (115-41-3,3117-41-7) → C25H26O16STi(2-)*2H3N*2H(1+)

Guidance literature:

In water; at 20 ℃;

DOI:10.1016/j.dyepig.2016.01.003

upstream raw materials:

2-sulfobenzoic acid cyclic anhydride

benzene-1,2-diol

Refernces