Molekula
Catechol Violet (Pyrocatechol Violet)
Supplying 4,500+ customers in over 80 countries
ISO 9001:2015 & ISO 14001:2015 certified · Supplying laboratories and industry since 2000 · Listed pack sizes are a starting point — we manufacture, source and repack to the quantity you need
Catechol Violet, also known as Pyrocatechol Violet, is a synthetic organic dye used primarily in analytical chemistry as a pH indicator and in the detection of metal ions. It appears as a dark green crystalline powder with a molecular formula of C19H14O7S and a molecular weight of 386.38 g/mol. It is stable at ambient temperatures and does not require special storage conditions. CAS number: 115-41-3. Molekula supplies Catechol Violet from research to bulk quantities with full documentation and ISO 9001:2015 traceability.
Example image for illustration only. Other packaging and pack sizes are available.
Pricing & pack sizes
These pack sizes aren't a limit. Molekula manufactures, sources and repacks to order — if you need 500 kg and only see 1 kg listed, . We quote from grams to multi-tonne.
Need a different size? Add the nearest pack and change the size in your basket — we price it at the same rate per unit.
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5 g — $106.20 per pack
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Tell us how much you need and when — drums, IBCs, sacks or a one-off bulk lot. We'll manufacture or source it and come back with a price.
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Specifications
| Property | Value |
|---|---|
| Appearance | Dark green to black/brown powder |
| Assay (Titration) | ≥80% |
| Lambda max | 441 nm |
| Solubility (10mg/ml, H2O) | Red to brown solution |
| Suitability as a complexometric indicator | Passes test |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Acidity | Neutral |
Identification
| Property | Value |
|---|---|
| SKU | 21118006 |
| CAS Number | 115-41-3 |
| IUPAC Name | 4-[3-(3,4-dihydroxyphenyl)-1,1-dioxo-2,1lambda6-benzoxathiol-3-yl]benzene-1,2-diol |
| EC Number | 204-088-3 |
| Molecular Formula | C19H14O7S |
| Molecular Weight | 386.38 |
| Exact Mass | 386.046 |
| SMILES | C1=CC=C2C(=C1)C(OS2(=O)=O)(C3=CC(=C(C=C3)O)O)C4=CC(=C(C=C4)O)O |
| InChIKey | RRRCKIRSVQAAAS-UHFFFAOYSA-N |
| InChI | 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)26-19/h1-10,20-23H |
| PubChem CID | 66993 |
| REACH Code | Y113 |
| TSCA Listed | Yes |
| HTS Code | 2934.99.9001 |
| Tariff Code | 2934999090 |
Safety & GHS
Precautionary statements
- P280 Wear protective gloves/protective clothing/eye protection/face protection
Documents
Safety Data Sheets (SDS)
Available in English, English (US), French, German, Italian, Portuguese, Spanish.
Certificate of Analysis (CoA) by batch
Enter a lot or batch number to retrieve the CoA for that specific batch. We can generate one from spec data if no PDF is on file.
Synonyms
- 1,2-Benzenediol, 4,4'-(1,1-dioxido-3H-2,1-benzoxathiol-3-ylidene)bis-
- 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]
- Catechol violet
- Catechol violet indicator
- PKF
- Pyrocatechinsulfonephthalein
- Pyrocatechol violet
- Pyrocatecholsulfonphthalein
- starbld0016674
Frequently asked questions
What is Catechol Violet used for?
Catechol Violet is a sulfonephthalein analytical reagent used as a complexometric (metallochromic) indicator in EDTA titrations, as a pH indicator, and for the spectrophotometric detection of metals such as aluminium, tin and bismuth.
What is the chemical formula and molecular weight of Catechol Violet?
The formula is C19H14O7S with a molecular weight of 386.38 g/mol.
How should Catechol Violet be stored?
It should be stored at ambient temperature, protected from moisture and light.
What grade of Catechol Violet does Molekula supply?
Molekula supplies Catechol Violet in analytical grade.
Can Molekula supply Catechol Violet in bulk quantities?
Yes, Molekula can supply Catechol Violet in bulk; please contact our sales team for volume pricing and availability.
What documentation comes with a Catechol Violet order?
Each order includes a Certificate of Analysis (CoA) and Safety Data Sheet (SDS), available upon request.
Ready to order or need a custom pack?
Tell us the product, grade, and quantity — Molekula usually responds within one working day with pricing and lead time.