Pyrocatechol violet
Order Pyrocatechol violet (CAS 115-41-3) online at Zemixal. Lab and bulk packs, batch COA, fast global delivery. Catalogue no. ZX-000406.
About Pyrocatechol violet
Zemixal supplies Pyrocatechol violet within its laboratory Chemicals & Reagents portfolio. For your records (AR), the material is defined by CAS 115-41-3, formula C19H14O7S and molar mass 386.4 g/mol. Expect purple to dark purple to violet powder.
Where it is used
- Titration end-point detection
- pH determination
- Analytical testing
Safe handling
Reported physical data: melting point 185 °C (dec.) and density ~1.57 (Predicted). It carries the GHS signal word Warning (H315, H319 and H335), so wear gloves and eye protection and work with good ventilation.
Order it in 1 g, 5 g, 25 g and 1 kg packs or ask for a bulk quotation. Each lot travels with a batch certificate of analysis and a 16-section SDS. Add it to your quote list and our team replies with price, lead time and shipping options within one business day.
Typical uses
- Titration end-point detection
- pH determination
- Analytical testing
Applications
Grade guides
Specifications and identifiers
| Product name | Pyrocatechol violet |
|---|---|
| Catalogue number | ZX-000406 |
| CAS number | 115-41-3 |
| IUPAC name | 4-[3-(3,4-dihydroxyphenyl)-1,1-dioxo-2,1lambda6-benzoxathiol-3-yl]benzene-1,2-diol |
| Molecular formula | C19H14O7S |
| Molar mass | 386.4 g/mol |
| Exact mass | 386.046 |
| Grade | AR |
| Physical form | Powder |
| Appearance | Purple to dark purple to violet powder |
| Melting point | 185 °C (dec.) |
| Density | ~1.57 (Predicted) |
| XLogP3 | 2.3 |
| H-bond donors / acceptors | 4 / 7 |
| Topological polar surface area | 133 Ų |
| HS code | 29072990 |
| InChIKey | RRRCKIRSVQAAAS-UHFFFAOYSA-N |
| SMILES | C1=CC=C2C(=C1)C(OS2(=O)=O)(C3=CC(=C(C=C3)O)O)C4=CC(=C(C=C4)O)O |
| PubChem CID | 66993 |
| Synonyms | Catechol violet, Pyrocatecholsulfonphthalein, 1,2-Benzenediol, 4,4'-(1,1-dioxido-3H-2,1-benzoxathiol-3-ylidene)bis-, Pyrocatechinsulfonephthalein, Pyrocatechol sulfonphthalein, 3,3-bis(3,4-dihydroxyphenyl)-3H-benzo[c][1,2]oxathiole 1,1-dioxide, 4,4'-(1,1-Dioxido-3H-2,1-benzoxathiol-3-ylidene)bis[1,2-benzenediol], starbld0016674, Catechol violet indicator, 3H-2,1-Benzoxathiole, 3,3-bis(3,4-dihydroxyphenyl)-, 1,1-dioxide, 1,2-Benzenediol, 4,4'-(3H-2,1-benzoxathiol-3-ylidene)bis-, S,S-dioxide, 4-[3-(3,4-dihydroxyphenyl)-1,1-dioxo-2,1$l^{6}-benzoxathiol-3-yl]benzene-1,2-diol |
Lot values are stated on the batch certificate of analysis. Ask for a typical COA with your quotation.
Safety and GHS hazards
Signal word Warning
- H315Causes skin irritation
- H319Causes serious eye irritation
- H335May cause respiratory irritation
Precautionary statements P261, P264, P264 + P265, P271, P280, P302 + P352, P304 + P340, P305 + P351 + P338, P319, P321, P332 + P317, P337 + P317, P362 + P364, P403 + P233, P405, P501
Classification summarised from public GHS notifications. It can vary with grade and concentration, so always follow the SDS supplied with your lot.
Pack sizes
| 1 g | Quoted on request | |
| 5 g | Quoted on request | |
| 25 g | Quoted on request | |
| 1 kg | Quoted on request |
Need a different size? Bulk drums and custom packing are quoted on request through the quote form on this page.
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