4-Aminosalicylic acid
Also known as: 4-Amino-2-hydroxybenzoic acid, p-Aminosalicylic acid, PAS, para-Aminosalicylic acid, 4-ASA, Aminosalicylic Acid, 2-Hydroxy-4-aminobenzoic acid
4-Aminosalicylic acid (CAS 65-49-6) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C7H7NO3 and a molecular weight of 153.135 g/mol. Key properties include a melting point of 135-145 °C(lit.), a boiling point of 380.8±32.0 °C at 760 mmHg, a density of 1.5±0.1 g/cm3 and a flash point of 184.1±25.1 °C. It is classified under GHS with signal word Warning and hazard statements H319 — Causes serious eye irritation. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 65-49-6
- Jingsj CID
- J-953389-5
- Molecular Formula
- C7H7NO3
- Molecular Weight
- 153.135 g/mol
- Category
- Organic Acids
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | 135-145 °C(lit.) |
|---|---|
| Boiling Point | 380.8±32.0 °C at 760 mmHg |
| Density | 1.5±0.1 g/cm3 |
| Flash Point | 184.1±25.1 °C |
| Exact Mass | 153.042587 |
| PSA | 83.55000 |
| LogP | 1.14 |
| Vapor Pressure | 0.0±0.9 mmHg at 25°C |
| Refractive Index | 1.691 |
| Additional Property | 2 g/L (20 ºC) |
GHS Safety & Compliance
- H319 — Causes serious eye irritation
Activity & Biological Data
| Additional Information | [1]. Vânia André, et al. Crystal Forms of the Antibiotic 4-Aminosalicylic Acid: Solvates and Molecular Salts with Dioxane, Morpholine, and Piperazine. Cryst. Growth Des. 2009, 9, 12, 5108-5116. |
|---|
Customs & Trade Information
| HS Code | 29225000 |
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Frequently Asked Questions
What is the CAS number of 4-Aminosalicylic acid?
The CAS number of 4-Aminosalicylic acid is 65-49-6.
What are the molecular formula and molecular weight of 4-Aminosalicylic acid?
4-Aminosalicylic acid has molecular formula C7H7NO3 and molecular weight 153.135 g/mol.
Is 4-Aminosalicylic acid hazardous?
4-Aminosalicylic acid has GHS signal word Warning and hazard statements H319 — Causes serious eye irritation.
What are the upstream and downstream products of 4-Aminosalicylic acid?
For 4-Aminosalicylic acid, Upstream Products: 4-Nitrosalicylic acid, 3-Aminophenol, Resorcinol; Downstream Products: Methyl 4-acetamido-5-chloro-2-ethoxybenzoate, 4-Acetamidosalicylic acid, 4-Chlorosalicylic 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. "4-Aminosalicylic acid (CAS 65-49-6)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-953389-5 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.