1,8-Naphthalic anhydride
Also known as: Naphthalic anhydride, 1,8-Naphthalenedicarboxylic acid anhydride, 1H,3H-Benzo[de]isochromene-1,3-dione, 1H,3H-Naphtho[1,8-cd]pyran-1,3-dione, Naphthalene-1,8-dicarboxylic anhydride
1,8-Naphthalic anhydride (CAS 81-84-5) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C12H6O3 and a molecular weight of 198.174 g/mol. Key properties include a melting point of 269 °C, a boiling point of 407.5±14.0 °C at 760 mmHg, a density of 1.5±0.1 g/cm3 and a flash point of 206.8±17.3 °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 Aug 21, 2026.
- CAS No.
- 81-84-5
- Jingsj CID
- J-29831-3
- Molecular Formula
- C12H6O3
- Molecular Weight
- 198.174 g/mol
- Category
- Organic Acids
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | 269 °C |
|---|---|
| Boiling Point | 407.5±14.0 °C at 760 mmHg |
| Density | 1.5±0.1 g/cm3 |
| Flash Point | 206.8±17.3 °C |
| Exact Mass | 198.031693 |
| PSA | 43.37000 |
| LogP | 1.75 |
| Vapor Pressure | 0.0±1.0 mmHg at 25°C |
| Refractive Index | 1.712 |
| 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 | 2932999099 |
|---|---|
| Summary | 2932999099. other heterocyclic compounds with oxygen hetero-atom(s) only. VAT:17.0%. Tax rebate rate:13.0%. . MFN tariff:6.5%. General tariff:20.0% |
Frequently Asked Questions
What is the CAS number of 1,8-Naphthalic anhydride?
The CAS number of 1,8-Naphthalic anhydride is 81-84-5.
What are the molecular formula and molecular weight of 1,8-Naphthalic anhydride?
1,8-Naphthalic anhydride has molecular formula C12H6O3 and molecular weight 198.174 g/mol.
Is 1,8-Naphthalic anhydride hazardous?
1,8-Naphthalic 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 1,8-Naphthalic anhydride?
For 1,8-Naphthalic anhydride, Upstream Products: Acenaphthene, Acenaphthoquinone, 1,8-Diiodonaphthalene; Downstream Products: 2-(2-hydroxyethyl)-1H-benzo[de]isoquinoline-1,3(2H)-dione, 4-Bromo-3-nitro-1,8-naphthalic anhydride, Alrestatin.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "1,8-Naphthalic anhydride (CAS 81-84-5)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-29831-3 (accessed 2026-11-06).
Data for reference only; verify product details with suppliers before purchase.