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HuagongsheHuagongshe Chemistry Print Report · For research reference only
HCID 69430Generated: October 25, 2026

2-Oxopropiononitrile

ACETYL CYANIDE · 2-Oxopropanenitrile · Pyuvoitrile · PYRUVONITRILE · Pyruvocyanide · 1-Cyanoethanal · 1-Cyanoethanone · Oxypropionitrile

https://huagongshe.com/en/chemical/69430

2-Oxopropiononitrile molecular structure

Identifiers & Physical Properties

CAS No.631-57-2
Molecular formulaC3H3NO
Average molar mass69.06 g/mol
Monoisotopic mass69.02146372 g/mol
SMILESCC(=O)C#N
InChIKeyQLDHWVVRQCGZLE-UHFFFAOYSA-N
PubChem CID69430
EC No.211-159-2
DTXSIDDTXSID10212430

Chemical & Physical Properties

XLogP-0.1
Topological polar surface area40.9
Hydrogen bond donors0
Hydrogen bond acceptors2
Rotatable bonds0
Heavy atoms5
Formal charge0
Complexity86.3
Chemical classesNitrogen Compounds -> Nitriles
SpringerMaterials PropertiesSchoenflies notation
Physical DescriptionYellow liquid[Sigma-Aldrich MSDS]
Boiling point92-93 °C(lit.)
Density0.974 g/mL at 25 °C(lit.)
Refractive indexn20/D 1.376(lit.)
Flash point58 °F
Storage conditions2-8°C
SolubilitySoluble in ether and acetonitrile.
Physical stateLiquid
ColorColorless to brown
BRN1737633
Exposure limitsNIOSH: IDLH 25 mg/m3
InChI1S/C3H3NO/c1-3(5)2-4/h1H3
InChIKeyQLDHWVVRQCGZLE-UHFFFAOYSA-N
SMILESCC(=O)C#N
CAS DataBase Reference631-57-2
FDA UNIIULO441649V
UNSPSC Code12352100
NACRESNA.22
GHS pictogramGHS02,GHS06
Signal wordDanger
GHS hazard statementsH225-H301+H331-H315-H335-H412
GHS precautionary statementsP210-P233-P273-P301+P310-P303+P361+P353-P304+P340+P311
Target organsRespiratory system
Personal protective equipment (PPE)Eyeshields, Faceshields, Gloves, type ABEK (EN14387) respirator filter
Hazard symbolsF,T,N
Risk statements (R)11-23/25-51/53-37/38
Safety statements (S)45-61-36/37-16
UN transport numberUN 3273 3/PG 2
Water hazard class (WGK)3
F8-10-13
Hazard class3.1Acute Tox. 3 InhalationAcute Tox. 3 OralAquatic Chronic 3Flam. Liq. 2Skin Irrit. 2STOT SE 3
Packing groupII
Storage class3 - Flammable liquids

Safety & Regulations

GHS classificationDangerH225 (100%): Highly Flammable liquid and vapor [Danger Flammable liquids]P210, P233, P240, P241, P242, P243, P261, P264, P270, P271, P280, P301+P316, P302+P352, P303+P361+P353, P304+P340, P316, P319, P321, P330, P332+P317, P362+P364, P370+P378, P403+P233, P403+P235, P405, and P501 (click each P-code to see the statement)Aggregated GHS information provided per 42 reports by companies from 4 notifications to the ECHA C&L Inventory. Each notification may be associated with multiple companies.
Regulatory informationPropanenitrile, 2-oxo-: Does not have an individual approval but may be used as a component in a product covered by a group standard. It is not approved for use as a chemical in its own right.
Hazards summaryContains 5-10% mesitylene (CAS# 108-67-8)A skin and respiratory tract irritantToxic by ingestion and inhalation[Sigma-Aldrich MSDS] See 3-Bromopropionitrile and Propionitrile.
Hazard Classes and CategoriesFlam. Liq. 2 (100%)
Adverse effectsOther Poison - Chemical Asphyxiant
F8-10-13
Personal protective equipment (PPE)Eyeshields, Faceshields, Gloves, type ABEK (EN14387) respirator filter
Water hazard class (WGK)3
UN transport numberUN 3273 3/PG 2
Risk statements (R)11-23/25-51/53-37/38
Signal wordDanger
GHS pictogramGHS02,GHS06
Hazard symbolsF,T,N
Safety statements (S)45-61-36/37-16
Hazard class3.1Acute Tox. 3 InhalationAcute Tox. 3 OralAquatic Chronic 3Flam. Liq. 2Skin Irrit. 2STOT SE 3
Storage class3 - Flammable liquids
Packing groupII
Target organsRespiratory system
GHS hazard statementsH225-H301+H331-H315-H335-H412
GHS precautionary statementsP210-P233-P273-P301+P310-P303+P361+P353-P304+P340+P311

Applications & Uses

Description

Pyruvonitrile is a versatile electrophile useful for selective acylation, cyanohydrin synthesis, and cycloaddition reactions.

Uses

Pyruvonitrile was used in the synthesis of cuprate-carbonyl π-complexes by reaction with Me2CuLi in THF.

General Description

The infrared spectra of pyruvonitrile was studied.

Preparation & Synthesis

Preparation

Preparative Methods of Pyruvonitrile: acyl cyanides are readily prepared from the reaction of acyl halides with Copper(I) Cyanide, Sodium Cyanide,or Cyanotrimethylsilane and via the oxidation of cyanohydrins.