carbon suboxide
Also known as: 1,2-Propadiene-1,3-dione, 1,2-Propadiene-1,3-dione (9CI), 1,2-Propanediene-1,3-dione, 1,3-Allenedione, 1,3-Dioxopropadiene, Carbon suboxide, Dicarbonyl-methan, Kohlensuboxid, O=C=C=C=O, Propadiendion, Propadiene-1,3-dione, Tricarbondioxyd, propa-1,2-diene-1,3-dione, propadiene-1,3-dione, propadienedione, tricarbon dioxide
carbon suboxide (CAS 504-64-3) is a compound in the Organic Compounds category listed in the Jingsj chemical database. It has the molecular formula C3O2 and a molecular weight of 68.03090 g/mol. Key properties include a boiling point of 6.8ºC at 760mmHg and a density of 0.906g/cm3. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 504-64-3
- Jingsj CID
- J-44267-1
- Molecular Formula
- C3O2
- Molecular Weight
- 68.03090 g/mol
- Category
- Organic Compounds
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Boiling Point | 6.8ºC at 760mmHg |
|---|---|
| Density | 0.906g/cm3 |
| Exact Mass | 67.98980 |
| PSA | 34.14000 |
| Refractive Index | 1.351 |
Frequently Asked Questions
What is the CAS number of carbon suboxide?
The CAS number of carbon suboxide is 504-64-3.
What are the molecular formula and molecular weight of carbon suboxide?
carbon suboxide has molecular formula C3O2 and molecular weight 68.03090 g/mol.
What are the upstream and downstream products of carbon suboxide?
For carbon suboxide, Upstream Products: Bis(trimethylsilyl) malonate, Diethyl malonate, Malonic acid; Downstream Products: Dipropyl Malonate, Dihexyl Malonate.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "carbon suboxide (CAS 504-64-3)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-44267-1 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.