764-40-9

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764-40-9 Structure

Identification	Back Directory
[Name] 2,4-Pentadienal
[CAS] 764-40-9
[Synonyms] 2,4-Pentadienal penta-2,4-dienal 1,3-Pentadiene-5-one penta-2,4-dienal USP/EP/BP
[Molecular Formula] C5H6O
[MOL File] 764-40-9.mol
[Molecular Weight] 82.1

Chemical Properties	Back Directory
[Boiling point ] 36-37 °C(Press: 20 Torr)
[density ] 0.845±0.06 g/cm3(Predicted)
[FEMA ] 3217 \| 2,4-PENTADIENAL
[Odor] fruity
[Odor Type] fruity
[JECFA Number] 1173
[LogP] 0.53
[EPA Substance Registry System] 2,4-Pentadienal (764-40-9)

Raw materials And Preparation Products	Back Directory
[Raw materials] Manganese dioxide-->Chloromethane-->1,2-PENTADIENE

Hazard Information	Back Directory
[Chemical Properties] It has two isomers, cis and trans. Its boiling point is 29-30°C. Its relative density is 1.5115 for the cis form (d₄¹⁹) and 1.5185-1.5190 for the trans form (d₄¹⁹).
[Occurrence] Reported found in raw and roasted peanut.
[Synthesis] Can be synthesized from 2-ethoxy-Δ3-dihydropyrone and phosphoric acid; and cis- and trans-isomers can be prepared from the corresponding penta-2,4-dien-1-ol (cis- or trans-form) in methylene chloride in the presence of manganese dioxide.

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