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Ethyl 2,5-dihydroxybenzoate

Also known as: ethyl gentisate, 2,5-Dihydroxybenzoic acid ethyl ester, Gentisic acid ethyl ester, 2,5-dihydroxybenzoic acid ethyl ester, Benzoic acid,2,5-dihydroxy-, ethyl ester, 2-ethoxycarbonyl-1,4-benzenediol, ethoxycarbonylhydroquinone

Ethyl 2,5-dihydroxybenzoate (CAS 3943-91-7) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C9H10O4 and a molecular weight of 182.17300 g/mol. Key properties include a melting point of 77-81ºC(lit.), a boiling point of 337.2ºC at 760mmHg, a density of 1.294g/cm3 and a flash point of 137.2ºC. 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.
3943-91-7
Jingsj CID
J-37482-3
Molecular Formula
C9H10O4
Molecular Weight
182.17300 g/mol
Category
Organic Acids
Last updated
8/21/2026
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Physicochemical Properties

Melting Point77-81ºC(lit.)
Boiling Point337.2ºC at 760mmHg
Density1.294g/cm3
Flash Point137.2ºC
Exact Mass182.05800
PSA66.76000
LogP1.27450
Refractive Index1.573

GHS Safety & Compliance

IrritantSignal word: Warning
  • H315 — Causes skin irritation
  • H319 — Causes serious eye irritation
  • H335 — May cause respiratory irritation

Frequently Asked Questions

What is the CAS number of Ethyl 2,5-dihydroxybenzoate?

The CAS number of Ethyl 2,5-dihydroxybenzoate is 3943-91-7.

What are the molecular formula and molecular weight of Ethyl 2,5-dihydroxybenzoate?

Ethyl 2,5-dihydroxybenzoate has molecular formula C9H10O4 and molecular weight 182.17300 g/mol.

Is Ethyl 2,5-dihydroxybenzoate hazardous?

Ethyl 2,5-dihydroxybenzoate 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 Ethyl 2,5-dihydroxybenzoate?

For Ethyl 2,5-dihydroxybenzoate, Upstream Products: Ethanol, 2,5-Dihydroxybenzoic acid, Ethyl acrylate; Downstream Products: Ethyl 5-ethoxy-2-hydroxybenzoate, 2,5-Dihydroxy-N-(2-hydroxyethyl)benzamide.

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

Last updated:

How to cite: Jingsj. "Ethyl 2,5-dihydroxybenzoate (CAS 3943-91-7)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-37482-3 (accessed 2026-11-09).

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