3-Methylglutaric anhydride
Also known as: 4-methyloxane-2,6-dione, 4-methyltetrahydro-2H-pyran-2,6-dione, 3-methylpentanedioic anhydride, dihydro-4-methyl-2H-pyran-2,6(3H)-dione
3-Methylglutaric anhydride (CAS 4166-53-4) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C6H8O3 and a molecular weight of 128.12600 g/mol. Key properties include a melting point of 42-46 °C(lit.), a boiling point of 180-182 °C25 mm Hg(lit.), a density of 1.159g/cm3 and a flash point of >110.0 °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 Nov 3, 2026.
- CAS No.
- 4166-53-4
- Jingsj CID
- J-26432-4
- Molecular Formula
- C6H8O3
- Molecular Weight
- 128.12600 g/mol
- Category
- Organic Acids
- Last updated
- 11/3/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | 42-46 °C(lit.) |
|---|---|
| Boiling Point | 180-182 °C25 mm Hg(lit.) |
| Density | 1.159g/cm3 |
| Flash Point | >110.0 °C |
| Exact Mass | 128.04700 |
| PSA | 43.37000 |
| LogP | 0.48610 |
| Refractive Index | 1.448 |
GHS Safety & Compliance
- H315 — Causes skin irritation
- H319 — Causes serious eye irritation
- H335 — May cause respiratory irritation
Customs & Trade Information
| HS Code | 2917190090 |
|---|---|
| Summary | 2917190090 acyclic polycarboxylic acids, their anhydrides, halides, peroxides, peroxyacids and their derivatives VAT:17.0% Tax rebate rate:9.0% Supervision conditions:none MFN tariff:6.5% General tariff:30.0% |
Frequently Asked Questions
What is the CAS number of 3-Methylglutaric anhydride?
The CAS number of 3-Methylglutaric anhydride is 4166-53-4.
What are the molecular formula and molecular weight of 3-Methylglutaric anhydride?
3-Methylglutaric anhydride has molecular formula C6H8O3 and molecular weight 128.12600 g/mol.
Is 3-Methylglutaric anhydride hazardous?
3-Methylglutaric anhydride has GHS signal word Warning and hazard statements H315 — Causes skin irritation; H319 — Causes serious eye irritation; H335 — May cause respiratory irritation.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "3-Methylglutaric anhydride (CAS 4166-53-4)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-26432-4 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.