Methyl hydrogen isophthalate

间苯二甲酸单甲酯

Also known as: Mono-methyl isophthalate, Isophthalic acid monomethyl ester, 3-(Methoxycarbonyl)benzoic acid, Monomethyl isophthalate, Methyl m-phthalate, 1,3-Benzenedicarboxylic acid, monomethyl ester, 3-methoxycarbonylbenzoic acid, benzene-1,3-dicarboxylic acid monomethyl ester, Isophthalic acid methyl ester

Methyl hydrogen isophthalate (CAS 1877-71-0) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C9H8O4 and a molecular weight of 180.157 g/mol. It is also known as Mono-methyl isophthalate, Isophthalic acid monomethyl ester and 3-(Methoxycarbonyl)benzoic acid. Key properties include a melting point of 194-196 °C(lit.), a boiling point of 339.3±25.0 °C at 760 mmHg, a density of 1.3±0.1 g/cm3 and a flash point of 139.6±16.7 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 1877-71-0
Jingsj CID: J-4099-2
Molecular Formula: C₉H₈O₄
Chinese Name: 间苯二甲酸单甲酯
Molecular Weight: 180.157 g/mol
Category: Organic Acids
Last updated: 8/21/2026

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Physicochemical Properties

Melting Point	194-196 °C(lit.)
Boiling Point	339.3±25.0 °C at 760 mmHg
Density	1.3±0.1 g/cm3
Flash Point	139.6±16.7 °C

Frequently Asked Questions

What is the CAS number of Methyl hydrogen isophthalate?

The CAS number of Methyl hydrogen isophthalate is 1877-71-0.

What are the molecular formula and molecular weight of Methyl hydrogen isophthalate?

Methyl hydrogen isophthalate has molecular formula C9H8O4 and molecular weight 180.157 g/mol.

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

Last updated: 8/21/2026

How to cite: Jingsj. "Methyl hydrogen isophthalate (CAS 1877-71-0)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-4099-2 (accessed 2026-10-22).

Data for reference only; verify specifications, grades and regulatory status with suppliers before purchase.