Cresol red
Also known as: o-Cresolsulfonphthalein, o-Cresol red, Cresolsulfophthalein, 4,4'-(1,1-dioxido-3H-2,1-benzoxathiol-3-ylidene)bis(2-methylphenol), Phenol, 4,4'-(1,1-dioxido-3H-2,1-benzoxathiol-3-ylidene)bis[2-methyl-], 3,3-Bis(3-methyl-4-hydroxyphenyl)-3H-2,1-benzoxathiole 1,1-dioxide, 3,3-Bis(4-hydroxy-3-methylphenyl)-3H-benzo[c][1,2]oxathiole 1,1-dioxide
Cresol red (CAS 1733-12-6) is a compound in the Alcohols category listed in the Jingsj chemical database. It has the molecular formula C21H18O5S and a molecular weight of 382.430 g/mol. Key properties include a melting point of 290 °C, a boiling point of 561.9±50.0 °C at 760 mmHg, a density of 1.4±0.1 g/cm3 and a flash point of 293.6±30.1 °C. It is listed by 1 supplier; request a quote for pricing. Record last updated Aug 21, 2026.
- CAS No.
- 1733-12-6
- Jingsj CID
- J-38278-8
- Molecular Formula
- C21H18O5S
- Molecular Weight
- 382.430 g/mol
- Category
- Alcohols
- Last updated
- 8/21/2026
| Supplier | Purity / Pack | Base Price | Unit Price | Origin | |
|---|---|---|---|---|---|
Made to Order | - | - | CN China |
Physicochemical Properties
| Melting Point | 290 °C |
|---|---|
| Boiling Point | 561.9±50.0 °C at 760 mmHg |
| Density | 1.4±0.1 g/cm3 |
| Flash Point | 293.6±30.1 °C |
| Exact Mass | 382.087494 |
| PSA | 92.21000 |
| LogP | 3.94 |
| Vapor Pressure | 0.0±1.6 mmHg at 25°C |
| Refractive Index | 1.669 |
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 Cresol red?
The CAS number of Cresol red is 1733-12-6.
What are the molecular formula and molecular weight of Cresol red?
Cresol red has molecular formula C21H18O5S and molecular weight 382.430 g/mol.
Which suppliers offer Cresol red?
1 supplier(s) listed; request a quote for pricing.
What are the upstream and downstream products of Cresol red?
For Cresol red, Upstream Products: o-Cresol, Saccharin, 2-Sulfobenzoic anhydride.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "Cresol red (CAS 1733-12-6)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-38278-8 (accessed 2026-11-06).
Data for reference only; verify product details with suppliers before purchase.