N-Acetyl Mesalazine

Also known as: 5-acetamido-2-hydroxybenzoic acid, 5-acetamidosalicylic acid, N-Acetyl-5-aminosalicylic acid, Acetylmesalazine, CJ 46A, 3-Carboxyparacetamol, 5-(Acetylamino)salicylic acid, NSC 54183

N-Acetyl Mesalazine (CAS 51-59-2) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C9H9NO4 and a molecular weight of 195.17 g/mol. Key properties include a melting point of 228-230ºC, a boiling point of 480.2ºC at 760 mmHg, a density of 1.462 g/cm3 and a flash point of 244.2ºC. It is classified under GHS with signal word Warning and hazard statements H302 — Harmful if swallowed and H319 — Causes serious eye irritation. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 51-59-2
Jingsj CID: J-39125-3
Molecular Formula: C₉H₉NO₄
Molecular Weight: 195.17 g/mol
Category: Organic Acids
Last updated: 8/21/2026

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Physicochemical Properties

Melting Point	228-230ºC
Boiling Point	480.2ºC at 760 mmHg
Density	1.462 g/cm3
Flash Point	244.2ºC
Exact Mass	195.05300
PSA	86.63000
LogP	1.12180
Refractive Index	1.661
Storage Conditions	2-8°C

GHS Safety & Compliance

IrritantSignal word: Warning

H302 — Harmful if swallowed
H319 — Causes serious eye irritation

Activity & Biological Data

Additional Information	[1]. Allgayer H, et al. Modulation of base hydroxylation by bile acids and salicylates in a model of human colonic mucosal DNA: putative implications in colonic cancer. Dig Dis Sci. 1999 Apr;44(4):761-7. [2]. Fukuda T, et al. Mucosal concentrations of N-acetyl-5-aminosalicylic acid related to endoscopic activity in ulcerative colitis patients with mesalamine. J Gastroenterol Hepatol. 2020 Nov;35(11):1878-1885.

Additional Information

[1]. Allgayer H, et al. Modulation of base hydroxylation by bile acids and salicylates in a model of human colonic mucosal DNA: putative implications in colonic cancer. Dig Dis Sci. 1999 Apr;44(4):761-7. [2]. Fukuda T, et al. Mucosal concentrations of N-acetyl-5-aminosalicylic acid related to endoscopic activity in ulcerative colitis patients with mesalamine. J Gastroenterol Hepatol. 2020 Nov;35(11):1878-1885.

Customs & Trade Information

HS Code	2924299090
Summary	2924299090. other cyclic amides (including cyclic carbamates) and their derivatives; salts thereof. 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 N-Acetyl Mesalazine?

The CAS number of N-Acetyl Mesalazine is 51-59-2.

What are the molecular formula and molecular weight of N-Acetyl Mesalazine?

N-Acetyl Mesalazine has molecular formula C9H9NO4 and molecular weight 195.17 g/mol.

Is N-Acetyl Mesalazine hazardous?

N-Acetyl Mesalazine has GHS signal word Warning and hazard statements H302 — Harmful if swallowed; H319 — Causes serious eye irritation.

What are the upstream and downstream products of N-Acetyl Mesalazine?

For N-Acetyl Mesalazine, Upstream Products: 5-Aminosalicylic acid, Acetamide, 5-Nitrosalicylic acid; Downstream Products: Parsalmide.

Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.

Last updated: 8/21/2026

How to cite: Jingsj. "N-Acetyl Mesalazine (CAS 51-59-2)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-39125-3 (accessed 2026-11-09).

Data for reference only; verify product details with suppliers before purchase.