m-Methyl red
Also known as: 3-((4-(dimethylamino)phenyl)azo)benzoic acid, 3-((4-(Dimethylamino)phenyl)diazenyl)benzoic acid, 3-{(E)-[4-(dimethylamino)phenyl]diazenyl}benzoic acid, 4-Dimethylaminoazobenzene-3'-carboxylic acid, p-Dimethylaminoazobenzene-m-carboxylic acid, 3'-Carboxy-4-dimethylaminoazobenzene, M-METHYL RED, 3-Methyl red, N,N-Dimethyl-4-aminoazobenzene-3'-carboxylic acid
m-Methyl red (CAS 20691-84-3) is a compound in the Organic Compounds category listed in the Jingsj chemical database. It has the molecular formula C15H15N3O2 and a molecular weight of 269.298 g/mol. Key properties include a boiling point of 486.2±30.0 °C at 760 mmHg, a density of 1.2±0.1 g/cm3 and a flash point of 247.8±24.6 °C. It is listed by 1 supplier; request a quote for pricing. Record last updated Aug 21, 2026.
- CAS No.
- 20691-84-3
- Jingsj CID
- J-4798-3
- Molecular Formula
- C15H15N3O2
- Molecular Weight
- 269.298 g/mol
- Category
- Organic Compounds
- Last updated
- 8/21/2026
| Supplier | Purity / Pack | Base Price | Unit Price | Origin | |
|---|---|---|---|---|---|
Made to Order | - | - | CN China |
Physicochemical Properties
| Boiling Point | 486.2±30.0 °C at 760 mmHg |
|---|---|
| Density | 1.2±0.1 g/cm3 |
| Flash Point | 247.8±24.6 °C |
| Exact Mass | 269.116425 |
| PSA | 65.26000 |
| LogP | 4.17 |
| Vapor Pressure | 0.0±1.3 mmHg at 25°C |
| Refractive Index | 1.593 |
Customs & Trade Information
| HS Code | 2927000090 |
|---|---|
| Summary | 2927000090 other diazo-, azo- or azoxy-compounds。Supervision conditions:None。VAT:17.0%。Tax rebate rate:9.0%。MFN tariff:6.5%。General tariff:30.0% |
Frequently Asked Questions
What is the CAS number of m-Methyl red?
The CAS number of m-Methyl red is 20691-84-3.
What are the molecular formula and molecular weight of m-Methyl red?
m-Methyl red has molecular formula C15H15N3O2 and molecular weight 269.298 g/mol.
Which suppliers offer m-Methyl red?
1 supplier(s) listed; request a quote for pricing.
What are the upstream and downstream products of m-Methyl red?
For m-Methyl red, Upstream Products: N,N-Dimethylaniline, N,N-Dimethyl-4-nitroaniline, 3-Nitrobenzoic acid.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "m-Methyl red (CAS 20691-84-3)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-4798-3 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.