4-Fluoro-2-methylbenzoic acid
Also known as: 2-Carboxy-5-fluorotoluene, 4-Fluoro-o-toluic acid, 2-methyl-4-fluorobenzoic acid, Benzoic acid, 4-fluoro-2-methyl-, RARECHEM AL BE 0506, MFCD04115880
4-Fluoro-2-methylbenzoic acid (CAS 321-21-1) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C8H7FO2 and a molecular weight of 154.138 g/mol. Key properties include a melting point of 168-172 °C(lit.), a boiling point of 265.6±20.0 °C at 760 mmHg, a density of 1.3±0.1 g/cm3 and a flash point of 114.5±21.8 °C. It is classified under GHS with signal word Danger and hazard statements H302 — Harmful if swallowed and H318 — Causes serious eye damage. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 321-21-1
- Jingsj CID
- J-45181-0
- Molecular Formula
- C8H7FO2
- Molecular Weight
- 154.138 g/mol
- Category
- Organic Acids
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | 168-172 °C(lit.) |
|---|---|
| Boiling Point | 265.6±20.0 °C at 760 mmHg |
| Density | 1.3±0.1 g/cm3 |
| Flash Point | 114.5±21.8 °C |
| Exact Mass | 154.043015 |
| PSA | 37.30000 |
| LogP | 2.53 |
| Vapor Pressure | 0.0±0.6 mmHg at 25°C |
| Refractive Index | 1.533 |
GHS Safety & Compliance
- H302 — Harmful if swallowed
- H318 — Causes serious eye damage
Customs & Trade Information
| HS Code | 2916399090 |
|---|---|
| Summary | 2916399090 other aromatic monocarboxylic acids, their anhydrides, halides, peroxides, peroxyacids and their derivatives VAT:17.0% Tax rebate rate:9.0% Supervision conditions:none MFN tariff:6.5% General tariff:30.0% |
Frequently Asked Questions
What is the CAS number of 4-Fluoro-2-methylbenzoic acid?
The CAS number of 4-Fluoro-2-methylbenzoic acid is 321-21-1.
What are the molecular formula and molecular weight of 4-Fluoro-2-methylbenzoic acid?
4-Fluoro-2-methylbenzoic acid has molecular formula C8H7FO2 and molecular weight 154.138 g/mol.
Is 4-Fluoro-2-methylbenzoic acid hazardous?
4-Fluoro-2-methylbenzoic acid has GHS signal word Danger and hazard statements H302 — Harmful if swallowed; H318 — Causes serious eye damage.
What are the upstream and downstream products of 4-Fluoro-2-methylbenzoic acid?
For 4-Fluoro-2-methylbenzoic acid, Upstream Products: 2-Bromo-5-fluorotoluene, Carbon dioxide, 4-Fluoro-2-methylbenzonitrile; Downstream Products: Methyl 4-fluoro-2-methylbenzoate, 4-Fluoro-2-methylbenzoyl chloride, Methyl 2-(bromomethyl)-4-fluorobenzoate.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "4-Fluoro-2-methylbenzoic acid (CAS 321-21-1)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-45181-0 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.