2-Naphthaldehyde
Also known as: beta-Naphthaldehyde, naphthalene-2-carbaldehyde, 2-naphthalenecarboxaldehyde, 2-Formylnaphthalene, β-Formylnaphthalene
2-Naphthaldehyde (CAS 66-99-9) is a compound in the Aromatic Hydrocarbons category listed in the Jingsj chemical database. It has the molecular formula C11H8O and a molecular weight of 156.181 g/mol. Key properties include a melting point of 58-61 °C(lit.), a boiling point of 299.5±9.0 °C at 760 mmHg, a density of 1.2±0.1 g/cm3 and a flash point of 179.5±5.0 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 66-99-9
- Jingsj CID
- J-1353909-0
- Molecular Formula
- C11H8O
- Molecular Weight
- 156.181 g/mol
- Category
- Aromatic Hydrocarbons
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | 58-61 °C(lit.) |
|---|---|
| Boiling Point | 299.5±9.0 °C at 760 mmHg |
| Density | 1.2±0.1 g/cm3 |
| Flash Point | 179.5±5.0 °C |
| Exact Mass | 156.057510 |
| PSA | 17.07000 |
| LogP | 2.87 |
| Vapor Pressure | 0.0±0.6 mmHg at 25°C |
| Refractive Index | 1.676 |
| Additional Property | 1.0755 |
Customs & Trade Information
| HS Code | 2912299000 |
|---|---|
| Summary | 2912299000. other cyclic aldehydes without other oxygen function. VAT:17.0%. Tax rebate rate:13.0%. . MFN tariff:5.5%. General tariff:30.0% |
Frequently Asked Questions
What is the CAS number of 2-Naphthaldehyde?
The CAS number of 2-Naphthaldehyde is 66-99-9.
What are the molecular formula and molecular weight of 2-Naphthaldehyde?
2-Naphthaldehyde has molecular formula C11H8O and molecular weight 156.181 g/mol.
What are the upstream and downstream products of 2-Naphthaldehyde?
For 2-Naphthaldehyde, Upstream Products: 2-Naphthalenemethanol, 2-Naphthoyl chloride, 2-Naphthoic acid; Downstream Products: (5E)-5-(naphthalen-2-ylmethylidene)-2-sulfanylidene-1,3-thiazolidin-4-one, (2-Methylnaphthalen-1-yl)(naphthalen-2-yl)methanone, 2-Amino-2-(naphthalen-2-yl)acetic acid.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "2-Naphthaldehyde (CAS 66-99-9)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1353909-0 (accessed 2026-11-06).
Data for reference only; verify product details with suppliers before purchase.