(E)-2-Butenal , AR,98% , 123-73-9

CAS NO.：123-73-9

Empirical Formula: C4H6O

Molecular Weight: 70.09

MDL number: MFCD00007003

EINECS: 204-647-1

PRODUCT Properties

• Melting point: −76 °C(lit.)
• Boiling point: 104 °C(lit.)
• Density: 0.853 g/mL at 20 °C(lit.)
• vapor density: 2.41 (vs air)
• vapor pressure: 32 mm Hg ( 20 °C)
• refractive index: n20/D 1.437
• Flash point: 48 °F
• storage temp.: 2-8°C
• solubility: water: soluble425.4g/L at 20°C
• form: Liquid
• color: Clear
• Odor: Pungent
• explosive limit: 19.5%
• Water Solubility: 150 g/L (20 ºC)
• Merck: 14,2596
• BRN: 906731
• Exposure limits: TLV-TWA 6 mg/m³ (2 ppm)(ACGIH); IDLH 400 ppm (NIOSH).
• Stability: Light Sensitive
• InChIKey: MLUCVPSAIODCQM-NSCUHMNNSA-N
• LogP: 0.600

Description and Uses

Crotonaldehyde (2-butenal, β-methyl acrolein, propylene aldehyde) is similar in structure to acrolein, as both are α,β-unsaturated aldehydes. This structural similarity leads to similar sensitizing and irritating properties of the two compounds. Crotonaldehyde is used industrially in the preparation of other chemicals (chiefly sorbic acid), flavoring agents, and can form endogenously and in the environment.
Crotonaldehyde is used in the manufacture ofbutyl alcohol, butyraldehyde, and in severalorganic synthesis.

Safety

• Symbol(GHS): GHS02,GHS05,GHS06,GHS08,GHS09
• Signal word: Danger
• Hazard statements: H225-H301+H311-H315-H318-H330-H335-H341-H373-H400
• Precautionary statements: P201-P210-P280-P301+P310+P330-P304+P340+P310-P305+P351+P338+P310
• Hazard Codes: F,T+,N
• Risk Statements: 11-24/25-26-37/38-41-48/22-50-68-R68-R50-R48/22-R41-R37/38-R26-R24/25-R11
• Safety Statements: 26-28-36/37/39-45-61-28A-S61-S45-S36/37/39-S28A-S26-16
• RIDADR: UN 1143 6.1/PG 1
• OEB: B
• OEL: TWA: 2.0 ppm; 6.0 mg/m3
• WGK Germany: 3
• RTECS: GP9625000
• F: 9-13-23
• Autoignition Temperature: 320 °F
• HazardClass: 6.1
• PackingGroup: I
• HS Code: 29121990