Pyruvonitrile
Also known as: Acetyl cyanide, Acetylcyanide, 2-Oxopropanenitrile, 2-Oxopropionitrile, Oxopropionitrile, alpha-Oxopropionitrile, α-Oxopropionitrile, Propanenitrile, 2-oxo-
Pyruvonitrile (CAS 631-57-2) is a compound in the Organic Compounds category listed in the Jingsj chemical database. It has the molecular formula C3H3NO and a molecular weight of 69.062 g/mol. Key properties include a boiling point of 92.3±9.0 °C at 760 mmHg, a density of 1.0±0.1 g/cm3 and a flash point of 14.4±0.0 °C. It is classified under GHS with signal word Danger and hazard statements H225 — Highly flammable liquid and vapour, H301 — Toxic if swallowed and H331 — Toxic if inhaled. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 631-57-2
- Jingsj CID
- J-1993398-3
- Molecular Formula
- C3H3NO
- Molecular Weight
- 69.062 g/mol
- Category
- Organic Compounds
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Boiling Point | 92.3±9.0 °C at 760 mmHg |
|---|---|
| Density | 1.0±0.1 g/cm3 |
| Flash Point | 14.4±0.0 °C |
| Exact Mass | 69.021461 |
| PSA | 40.86000 |
| LogP | -0.71 |
| Vapor Pressure | 51.9±0.2 mmHg at 25°C |
| Refractive Index | 1.380 |
GHS Safety & Compliance
- H225 — Highly flammable liquid and vapour
- H301 — Toxic if swallowed
- H331 — Toxic if inhaled
- H315 — Causes skin irritation
- H335 — May cause respiratory irritation
- H412 — Harmful to aquatic life with long lasting effects
Frequently Asked Questions
What is the CAS number of Pyruvonitrile?
The CAS number of Pyruvonitrile is 631-57-2.
What are the molecular formula and molecular weight of Pyruvonitrile?
Pyruvonitrile has molecular formula C3H3NO and molecular weight 69.062 g/mol.
Is Pyruvonitrile hazardous?
Pyruvonitrile has GHS signal word Danger and hazard statements H225 — Highly flammable liquid and vapour; H301 — Toxic if swallowed; H331 — Toxic if inhaled.
What are the upstream and downstream products of Pyruvonitrile?
For Pyruvonitrile, Upstream Products: Chlorotrimethylsilane, Acetyl chloride, Diethyl cyanophosphonate; Downstream Products: Ethyl benzoate, Diethyl acetylphosphonate, N-(2-Hydroxy-4-methylphenyl)acetamide.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "Pyruvonitrile (CAS 631-57-2)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1993398-3 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.