1,1-Cyclopentanediacetic anhydride
Also known as: 3,3-Tetramethyleneglutaric anhydride, 8-oxaspiro[4.5]decane-7,9-dione, Cyclopentane-1,1-diacetic anhydride, beta,beta-Tetramethyleneglutaric anhydride, MFCD00006678, EINECS 227-116-6
1,1-Cyclopentanediacetic anhydride (CAS 5662-95-3) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C9H12O3 and a molecular weight of 168.19000 g/mol. Key properties include a melting point of 64-66 °C(lit.), a boiling point of 186 °C15 mm Hg(lit.), a density of 1.19 g/cm3 and a flash point of 154.5ºC. 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.
- 5662-95-3
- Jingsj CID
- J-34088-5
- Molecular Formula
- C9H12O3
- Molecular Weight
- 168.19000 g/mol
- Category
- Organic Acids
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | 64-66 °C(lit.) |
|---|---|
| Boiling Point | 186 °C15 mm Hg(lit.) |
| Density | 1.19 g/cm3 |
| Flash Point | 154.5ºC |
| Exact Mass | 168.07900 |
| PSA | 43.37000 |
| LogP | 1.41040 |
| Refractive Index | 1.502 |
| Additional Property | decomposes |
GHS Safety & Compliance
- H315 — Causes skin irritation
- H319 — Causes serious eye irritation
- H335 — May cause respiratory irritation
Customs & Trade Information
| HS Code | 2917209090 |
|---|---|
| Summary | 2917209090 other cyclanic, cyclenic or cyclotherpenic polycarboxylic acids, their anhydrides, halides, peroxides, peroxyacids and their derivatives。supervision conditions:AB(certificate of inspection for goods inward,certificate of inspection for goods outward)。VAT:17.0%。tax rebate rate:9.0%。MFN tariff:6.5%。general tariff:30.0% |
Frequently Asked Questions
What is the CAS number of 1,1-Cyclopentanediacetic anhydride?
The CAS number of 1,1-Cyclopentanediacetic anhydride is 5662-95-3.
What are the molecular formula and molecular weight of 1,1-Cyclopentanediacetic anhydride?
1,1-Cyclopentanediacetic anhydride has molecular formula C9H12O3 and molecular weight 168.19000 g/mol.
Is 1,1-Cyclopentanediacetic anhydride hazardous?
1,1-Cyclopentanediacetic anhydride 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 1,1-Cyclopentanediacetic anhydride?
For 1,1-Cyclopentanediacetic anhydride, Upstream Products: Cyclopentane-1,1-diacetic acid; Downstream Products: 8-(2-chloroethyl)-8-azaspiro[4.5]decane-7,9-dione, Buspirone, 3,3-Tetramethyleneglutarimide.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "1,1-Cyclopentanediacetic anhydride (CAS 5662-95-3)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-34088-5 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.