402788

Acetaldehyde

ACS reagent, ≥99.5%

• Synonym(s): Ethanal
• Linear Formula: CH₃CHO
• CAS Number: 75-07-0
• Molecular Weight: 44.05
• Beilstein/REAXYS Number: 505984
• EC Number: 200-836-8
• MDL number: MFCD00006991
• UNSPSC Code: 12352100
• eCl@ss: 39021102
• PubChem Substance ID: 24865119
• NACRES: NA.21

Properties

• biological source: synthetic
• Quality Level: 200
• grade: ACS reagent
• vapor density: 1.52 (vs air)
• vapor pressure: 14.63 psi ( 20 °C)
• assay: ≥99.5%
• form: liquid
• autoignition temp.: 365 °F
• expl. lim.: 60 %
• impurities: ≤0.008 meq/g Titr. acid
• evapn. residue: ≤0.005%
• refractive index: n20/D 1.332 (lit.)
• bp: 21 °C (lit.)
• mp: −125 °C (lit.)
• solubility: alcohols: soluble; water: miscible
• density: 0.785 g/mL at 25 °C (lit.)
• storage temp.: 2-8°C
• SMILES string: CC=O
• InChI: 1S/C2H4O/c1-2-3/h2H,1H3
• InChI key: IKHGUXGNUITLKF-UHFFFAOYSA-N

Description

General description

Acetaldehyde is an industrially important solvent used as an intermediate for the synthesis of a wide range of compounds. On oxidation it forms acetic acid and ethanol on reduction. The interaction of Criegee intermediate (CH₂OO) with acetaldehyde has been measured. Its effect as a neuroactive agent has been studied. Alkynylation reaction of acetaldehyde by asymmetric catalysis has been reported.

Application

Acetaldehyde may be used in the synthesis of 1,3-diamines by one-pot cross double-Mannich reaction and β-amino aldehydes by proline-catalyzed Mannich reaction.

Safety Information

• pictograms: GHS02,GHS08,GHS07
• signalword: Danger
• hcodes: H224,H319,H335,H341,H350
• pcodes: P202 - P210 - P233 - P305 + P351 + P338 - P308 + P313 - P403 + P233
• Hazard Classifications: Carc. 1B - Eye Irrit. 2 - Flam. Liq. 1 - Muta. 2 - STOT SE 3
• target_organs: Respiratory system
• Storage Class: 3 - Flammable liquids
• wgk_germany: WGK 3
• flash_point_f: -38.0 °F - closed cup
• flash_point_c: -38.89 °C - closed cup
• ppe: Eyeshields, Faceshields, Gloves