Allene
Also known as: 1,2-Propanediene, 1,2-propadiene, 1,2-propanediene, ALLENE, 170 G (IN LECTURE BOTTLE), Allene: (1,2-Propadiene), CH2=C=CH2, Dimethylene methane, EINECS 207-335-3, Isoallylene, MAPPGAS, MFCD00008566, PROPADIENE, allene, allenegas, methylene ethylene, propadienylidene, propardiene, sym-Allylene
Allene (CAS 463-49-0) is a compound in the Aliphatic Hydrocarbons category listed in the Jingsj chemical database. It has the molecular formula C3H4 and a molecular weight of 40.06390 g/mol. Key properties include a melting point of -136ºC(lit.), a boiling point of -34 °C and a density of 0.546 g/cm3. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 463-49-0
- Jingsj CID
- J-43597-8
- Molecular Formula
- C3H4
- Molecular Weight
- 40.06390 g/mol
- Category
- Aliphatic Hydrocarbons
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | -136ºC(lit.) |
|---|---|
| Boiling Point | -34 °C |
| Density | 0.546 g/cm3 |
| Exact Mass | 40.03130 |
| LogP | 0.95730 |
| Additional Property | 1.42 (20 °C, vs air) |
| Vapor Pressure | 5020mmHg at 25°C |
| Refractive Index | 1.339 |
Customs & Trade Information
| HS Code | 2901299090 |
|---|---|
| Summary | 2901299090 unsaturated acyclic hydrocarbons。Supervision conditions:None。VAT:17.0%。Tax rebate rate:9.0%。MFN tariff:2.0%。General tariff:30.0% |
Frequently Asked Questions
What is the CAS number of Allene?
The CAS number of Allene is 463-49-0.
What are the molecular formula and molecular weight of Allene?
Allene has molecular formula C3H4 and molecular weight 40.06390 g/mol.
What are the upstream and downstream products of Allene?
For Allene, Upstream Products: Isobutylene, 2,3-Dichloropropene, 2-allenyl-4,4,5,5-tetramethyl-1,3,2-dioxaborolane; Downstream Products: dec-1-yne, 1,3-Propanedithiol, Allyl mercaptan.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "Allene (CAS 463-49-0)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-43597-8 (accessed 2026-11-06).
Data for reference only; verify product details with suppliers before purchase.