Acetylsalicylic anhydride
Also known as: 2-Acetoxybenzoic anhydride, Aspirin anhydride, Acetylsalicylic acid anhydride, O-Acetylsalicylic anhydride, Salicylic anhydride diacetate, 2-(Acetyloxy)benzoic anhydride
Acetylsalicylic anhydride (CAS 1466-82-6) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C18H14O7 and a molecular weight of 342.300 g/mol. Key properties include a melting point of 80-83ºC, a boiling point of 511.2±35.0 °C at 760 mmHg, a density of 1.3±0.1 g/cm3 and a flash point of 226.4±26.0 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 1466-82-6
- Jingsj CID
- J-1159792-5
- Molecular Formula
- C18H14O7
- Molecular Weight
- 342.300 g/mol
- Category
- Organic Acids
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | 80-83ºC |
|---|---|
| Boiling Point | 511.2±35.0 °C at 760 mmHg |
| Density | 1.3±0.1 g/cm3 |
| Flash Point | 226.4±26.0 °C |
| Exact Mass | 342.073944 |
| PSA | 95.97000 |
| LogP | 1.33 |
| Vapor Pressure | 0.0±1.3 mmHg at 25°C |
| Refractive Index | 1.568 |
| Storage Conditions | 2-8°C |
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 Acetylsalicylic anhydride?
The CAS number of Acetylsalicylic anhydride is 1466-82-6.
What are the molecular formula and molecular weight of Acetylsalicylic anhydride?
Acetylsalicylic anhydride has molecular formula C18H14O7 and molecular weight 342.300 g/mol.
What are the upstream and downstream products of Acetylsalicylic anhydride?
For Acetylsalicylic anhydride, Upstream Products: Acetylsalicylic acid, Benzoyl chloride, O-Acetylsalicyloyl chloride; Downstream Products: Acetylsalicylsalicylic Acid, acetic acid, Salsalate.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "Acetylsalicylic anhydride (CAS 1466-82-6)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1159792-5 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.