Methyl hydrogen phthalate
Also known as: mono-Methyl phthalate, Monomethyl phthalate, 1,2-Benzenedicarboxylic acid, monomethyl ester, 2-(Methoxycarbonyl)benzoic acid, 2-methoxycarbonylbenzoic acid, Methyl 2-Carboxybenzoate, Phthalic acid monomethyl ester, Phthalic acid methyl ester, NSC 8281, MFCD00002466
Methyl hydrogen phthalate (CAS 4376-18-5) 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. Key properties include a melting point of 82-84 °C(lit.), a boiling point of 328.9±25.0 °C at 760 mmHg, a density of 1.3±0.1 g/cm3 and a flash point of 134.7±16.7 °C. 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.
- 4376-18-5
- Jingsj CID
- J-48437-7
- Molecular Formula
- C9H8O4
- Molecular Weight
- 180.157 g/mol
- Category
- Organic Acids
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | 82-84 °C(lit.) |
|---|---|
| Boiling Point | 328.9±25.0 °C at 760 mmHg |
| Density | 1.3±0.1 g/cm3 |
| Flash Point | 134.7±16.7 °C |
| Exact Mass | 180.042252 |
| PSA | 63.60000 |
| LogP | 1.13 |
| Vapor Pressure | 0.0±0.8 mmHg at 25°C |
| Refractive Index | 1.556 |
GHS Safety & Compliance
- H315 — Causes skin irritation
- H319 — Causes serious eye irritation
- H335 — May cause respiratory irritation
Activity & Biological Data
| Additional Information | [1]. Chong Liu, et al. Urinary biomarkers of phthalates exposure and risks of thyroid cancer and benign nodule. J Hazard Mater. 2020 Feb 5;383:121189. |
|---|
Frequently Asked Questions
What is the CAS number of Methyl hydrogen phthalate?
The CAS number of Methyl hydrogen phthalate is 4376-18-5.
What are the molecular formula and molecular weight of Methyl hydrogen phthalate?
Methyl hydrogen phthalate has molecular formula C9H8O4 and molecular weight 180.157 g/mol.
Is Methyl hydrogen phthalate hazardous?
Methyl hydrogen phthalate 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 Methyl hydrogen phthalate?
For Methyl hydrogen phthalate, Upstream Products: Dimethyl phthalate, Carbon dioxide, Methyl 2-iodobenzoate; Downstream Products: (-)-Mono-(1R)-menthyl phthalate, Phthalic anhydride, Methyl trifluoroacetate.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "Methyl hydrogen phthalate (CAS 4376-18-5)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-48437-7 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.