Isoxepac

Also known as: 6,11-Dihydro-11-oxodibenzo[b,e]oxepin-2-acetic acid, (11-Oxo-6,11-dihydrodibenzo[b,e]oxepin-2-yl)acetic acid, Olopatadine USP RC C, Olopatadine Impurity 3, HP 549, 2-(11-Oxo-6,11-dihydrodibenzo[b,e]oxepin-2-yl)acetic acid, Artil

Isoxepac (CAS 55453-87-7) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C16H12O4 and a molecular weight of 268.264 g/mol. Key properties include a melting point of 130-132ºC, a boiling point of 528.2±50.0 °C at 760 mmHg, a density of 1.3±0.1 g/cm3 and a flash point of 203.8±23.6 °C. It is listed by 1 supplier; request a quote for pricing. Record last updated Aug 21, 2026.

CAS No.: 55453-87-7
Jingsj CID: J-1972592-9
Molecular Formula: C₁₆H₁₂O₄
Molecular Weight: 268.264 g/mol
Category: Organic Acids
Last updated: 8/21/2026

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Physicochemical Properties

Melting Point	130-132ºC
Boiling Point	528.2±50.0 °C at 760 mmHg
Density	1.3±0.1 g/cm3
Flash Point	203.8±23.6 °C
Exact Mass	268.073547
PSA	63.60000
LogP	2.64
Vapor Pressure	0.0±1.5 mmHg at 25°C
Refractive Index	1.636
Storage Conditions	Refrigerator

Activity & Biological Data

Additional Information	[1]. L S Gerlis, et al. Isoxepac in rheumatoid arthritis: a double-blind comparison with aspirin. Rheumatol Rehabil. 1981 Feb 1;20(1):50-3. [2]. W J Honig, et al. Analgesic effect of isoxepac on postmeniscectomy pain: a controlled trial. J Clin Pharmacol. Feb-Mar 1982;22(2-3):82-8. [3]. H P Illing, et al. Species differences in the disposition and metabolism of 6,11-dihydro-11-oxodibenz[be]oxepin-2-acetic acid (isoxepac) in rat, rabbit, dog, rhesus monkey, and man. Drug Metab Dispos. Sep-Oct 1978;6(5):510-7.

Additional Information

[1]. L S Gerlis, et al. Isoxepac in rheumatoid arthritis: a double-blind comparison with aspirin. Rheumatol Rehabil. 1981 Feb 1;20(1):50-3. [2]. W J Honig, et al. Analgesic effect of isoxepac on postmeniscectomy pain: a controlled trial. J Clin Pharmacol. Feb-Mar 1982;22(2-3):82-8. [3]. H P Illing, et al. Species differences in the disposition and metabolism of 6,11-dihydro-11-oxodibenz[be]oxepin-2-acetic acid (isoxepac) in rat, rabbit, dog, rhesus monkey, and man. Drug Metab Dispos. Sep-Oct 1978;6(5):510-7.

Customs & Trade Information

HS Code	2932999099
Summary	2932999099. other heterocyclic compounds with oxygen hetero-atom(s) only. VAT:17.0%. Tax rebate rate:13.0%. . MFN tariff:6.5%. General tariff:20.0%

Frequently Asked Questions

What is the CAS number of Isoxepac?

The CAS number of Isoxepac is 55453-87-7.

What are the molecular formula and molecular weight of Isoxepac?

Isoxepac has molecular formula C16H12O4 and molecular weight 268.264 g/mol.

Which suppliers offer Isoxepac?

1 supplier(s) listed; request a quote for pricing.

What are the upstream and downstream products of Isoxepac?

For Isoxepac, Upstream Products: 4-[(2-Carboxyphenyl)methoxy]benzeneacetic acid, Methyl 2-bromomethylbenzoate, Ethyl 4-hydroxyphenylacetate; Downstream Products: Methyl 2-(11-oxo-6,11-dihydrodibenzo[b,e]oxepin-2-yl)acetate, Olopatadine hydrochloride.

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. "Isoxepac (CAS 55453-87-7)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1972592-9 (accessed 2026-11-09).

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