5-Methoxy-3-methylphthalic acid
Also known as: 5-Methoxy-3-methylphthalic acid, 1,2-Benzenedicarboxylic acid, 5-methoxy-3-methyl-, 5-Methoxy-3-methyl-phthalsaeure, 5-Methoxy-3-methyl-phthalic acid, 5-Methoxy-3-methylbenzene-1,2-dicarboxylic acid
5-Methoxy-3-methylphthalic acid (CAS 103203-38-9) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C10H10O5 and a molecular weight of 210.18300 g/mol. Key properties include a boiling point of 399.7ºC at 760mmHg, a density of 1.358g/cm3 and a flash point of 161.1ºC. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 103203-38-9
- Jingsj CID
- J-1517908-5
- Molecular Formula
- C10H10O5
- Molecular Weight
- 210.18300 g/mol
- Category
- Organic Acids
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Boiling Point | 399.7ºC at 760mmHg |
|---|---|
| Density | 1.358g/cm3 |
| Flash Point | 161.1ºC |
| Exact Mass | 210.05300 |
| PSA | 83.83000 |
| LogP | 1.40000 |
| Vapor Pressure | 4.16E-07mmHg at 25°C |
| Refractive Index | 1.581 |
Customs & Trade Information
| HS Code | 2918990090 |
|---|---|
| Summary | 2918990090. other carboxylic acids with additional oxygen function and their anhydrides, halides, peroxides and peroxyacids; their halogenated, sulphonated, nitrated or nitrosated derivatives. 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 5-Methoxy-3-methylphthalic acid?
The CAS number of 5-Methoxy-3-methylphthalic acid is 103203-38-9.
What are the molecular formula and molecular weight of 5-Methoxy-3-methylphthalic acid?
5-Methoxy-3-methylphthalic acid has molecular formula C10H10O5 and molecular weight 210.18300 g/mol.
What are the upstream and downstream products of 5-Methoxy-3-methylphthalic acid?
For 5-Methoxy-3-methylphthalic acid, Upstream Products: Methyl 2-cyano-5-methoxy-3-methylbenzoate, Methyl 3-hydroxy-5-methylbenzoate.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "5-Methoxy-3-methylphthalic acid (CAS 103203-38-9)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1517908-5 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.