3,5-Dichloro-2-hydroxybenzoic acid
Also known as: 3,5-Dichlorosalicylic acid, 2-Hydroxy-3,5-dichlorobenzoic acid, Benzoic acid, 3,5-dichloro-2-hydroxy-, Salicylic acid, 3,5-dichloro-, NSC 30109
3,5-Dichloro-2-hydroxybenzoic acid (CAS 320-72-9) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C7H4Cl2O3 and a molecular weight of 207.011 g/mol. Key properties include a melting point of 221-224 °C, a boiling point of 319.3±42.0 °C at 760 mmHg, a density of 1.7±0.1 g/cm3 and a flash point of 146.9±27.9 °C. It is classified under GHS with signal word Warning and hazard statements H315 — Causes skin irritation, H319 — Causes serious eye irritation and H335 — May cause respiratory irritation. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 320-72-9
- Jingsj CID
- J-5509-4
- Molecular Formula
- C7H4Cl2O3
- Molecular Weight
- 207.011 g/mol
- Category
- Organic Acids
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | 221-224 °C |
|---|---|
| Boiling Point | 319.3±42.0 °C at 760 mmHg |
| Density | 1.7±0.1 g/cm3 |
| Flash Point | 146.9±27.9 °C |
| Exact Mass | 205.953751 |
| PSA | 57.53000 |
| LogP | 4.40 |
| Vapor Pressure | 0.0±0.7 mmHg at 25°C |
| Refractive Index | 1.641 |
GHS Safety & Compliance
- H315 — Causes skin irritation
- H319 — Causes serious eye irritation
- H335 — May cause respiratory irritation
Customs & Trade Information
| HS Code | 2918290000 |
|---|---|
| Summary | HS: 2918290000 other carboxylic acids with phenol function but without other oxygen function, their anhydrides, halides, peroxides, peroxyacids and their derivatives Tax rebate rate:9.0% Supervision conditions:AB(certificate of inspection for goods inward,certificate of inspection for goods outward) VAT:17.0% MFN tariff:6.5% General tariff:30.0% |
Frequently Asked Questions
What is the CAS number of 3,5-Dichloro-2-hydroxybenzoic acid?
The CAS number of 3,5-Dichloro-2-hydroxybenzoic acid is 320-72-9.
What are the molecular formula and molecular weight of 3,5-Dichloro-2-hydroxybenzoic acid?
3,5-Dichloro-2-hydroxybenzoic acid has molecular formula C7H4Cl2O3 and molecular weight 207.011 g/mol.
Is 3,5-Dichloro-2-hydroxybenzoic acid hazardous?
3,5-Dichloro-2-hydroxybenzoic acid has GHS signal word Warning and hazard statements H315 — Causes skin irritation; H319 — Causes serious eye irritation; H335 — May cause respiratory irritation.
What are the upstream and downstream products of 3,5-Dichloro-2-hydroxybenzoic acid?
For 3,5-Dichloro-2-hydroxybenzoic acid, Upstream Products: Salicylic acid, 5-Chlorosalicylic acid, 5-Sulfosalicylic acid; Downstream Products: 3,4,6-Trichloro-2-nitrophenol, 3,5,6-Trichlorosalicylic acid, Metabromsalan.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "3,5-Dichloro-2-hydroxybenzoic acid (CAS 320-72-9)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-5509-4 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.