Methyltetrahydrophthalic anhydride
3-甲基四氢苯二甲酸酐
Also known as: MTHPA, 4-MTHPA, AC 220, AC 220J, AC-METHYL, Lindride, MTHPA-600, MTHPA-EG, ac220, ac220j, MFCD00014585, 1,3-Isobenzofurandione, 3a,4,7,7a-tetrahydromethyl-, 3a,4,7,7a-tetrahydromethyl-3-isobenzofurandione, Methyl-1,2,3,6-tetrahydrophthalic anhydride
Methyltetrahydrophthalic anhydride (CAS 26590-20-5) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C9H10O3 and a molecular weight of 166.17400 g/mol. It is also known as MTHPA, 4-MTHPA and AC 220. Key properties include a melting point of 90°C, a boiling point of 308.9ºC at 760mmHg, a density of 1.25~1.35g/cm3 and a flash point of 146.8ºC. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 26590-20-5
- Jingsj CID
- J-48270-1
- Molecular Formula
- C9H10O3
- Chinese Name
- 3-甲基四氢苯二甲酸酐
- Molecular Weight
- 166.17400 g/mol
- Category
- Organic Acids
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | 90°C |
|---|---|
| Boiling Point | 308.9ºC at 760mmHg |
| Density | 1.25~1.35g/cm3 |
| Flash Point | 146.8ºC |
Frequently Asked Questions
What is the CAS number of Methyltetrahydrophthalic anhydride?
The CAS number of Methyltetrahydrophthalic anhydride is 26590-20-5.
What are the molecular formula and molecular weight of Methyltetrahydrophthalic anhydride?
Methyltetrahydrophthalic anhydride has molecular formula C9H10O3 and molecular weight 166.17400 g/mol.
Data compiled from public chemical databases and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "Methyltetrahydrophthalic anhydride (CAS 26590-20-5)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-48270-1 (accessed 2026-10-24).
Data for reference only; verify specifications, grades and regulatory status with suppliers before purchase.