Pyrogallol red
Also known as: Pyrogallol Red, Pyrogallolsulfonephthalein, Pyrogallol Red, indicator grade, Pyrogallol Red, pure, 98%, PR, PyrogallolRedGr, Spiro[3H-2,1-benzoxathiole-3,9'-[9H]xanthene]-3',4',5',6'-tetrol, 1,1-dioxide, 3',4',5',6'-Tetrahydroxyspiro[benzo[c][1,2]oxathiole-3,9'-xanthene] 1,1-dioxide, EINECS 251-134-3, MFCD00005046, Pyrogallol sulfonphthalein, 1,2,3-Benzenetriol red
Pyrogallol red (CAS 32638-88-3) is a compound in the Alcohols category listed in the Jingsj chemical database. It has the molecular formula C19H12O8S and a molecular weight of 400.35900 g/mol. Key properties include a melting point of 133-134 °C(lit.), a boiling point of 309 °C(lit.) and a density of 1.082 g/mL at 20 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 32638-88-3
- Jingsj CID
- J-47743-5
- Molecular Formula
- C19H12O8S
- Molecular Weight
- 400.35900 g/mol
- Category
- Alcohols
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | 133-134 °C(lit.) |
|---|---|
| Boiling Point | 309 °C(lit.) |
| Density | 1.082 g/mL at 20 °C |
| Exact Mass | 400.02500 |
| PSA | 141.90000 |
| LogP | 3.70630 |
| Appearance | Liquid | Dark brown |
| Additional Property | 4.4 (vs air) |
| Vapor Pressure | 10 mm Hg ( 167.7 °C) |
| Refractive Index | n20/D 1.387 |
| Additional Property | Soluble in water, ammonium hydroxide (10 mg/ml), and ethanol. |
Customs & Trade Information
| HS Code | 2934991000 |
|---|---|
| Summary | 2934991000. sultones and sultams. VAT:17.0%. Tax rebate rate:13.0%. . MFN tariff:6.5%. General tariff:30.0% |
Frequently Asked Questions
What is the CAS number of Pyrogallol red?
The CAS number of Pyrogallol red is 32638-88-3.
What are the molecular formula and molecular weight of Pyrogallol red?
Pyrogallol red has molecular formula C19H12O8S and molecular weight 400.35900 g/mol.
What are the upstream and downstream products of Pyrogallol red?
For Pyrogallol red, Upstream Products: 2-Sulfobenzoic anhydride, Pyrogallol.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "Pyrogallol red (CAS 32638-88-3)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-47743-5 (accessed 2026-11-06).
Data for reference only; verify product details with suppliers before purchase.