trans-2-Heptenal

Also known as: (E)-2-Heptenal, 2-Heptenal, (2E)-, 2-trans-Heptenal, (2E)-Hept-2-enal, trans-2-Hepten-1-al, Hept-2-enal

trans-2-Heptenal (CAS 18829-55-5) is a compound in the Aliphatic Hydrocarbons category listed in the Jingsj chemical database. It has the molecular formula C7H12O and a molecular weight of 112.170 g/mol. Key properties include a boiling point of 166.0±0.0 °C at 760 mmHg, a density of 0.8±0.1 g/cm3 and a flash point of 53.3±0.0 °C. It is classified under GHS with signal word Danger and hazard statements H226 — Flammable liquid and vapour, H302 — Harmful if swallowed and H311 — Toxic in contact with skin. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 18829-55-5
Jingsj CID: J-29311-8
Molecular Formula: C₇H₁₂O
Molecular Weight: 112.170 g/mol
Category: Aliphatic Hydrocarbons
Last updated: 8/21/2026

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Physicochemical Properties

Boiling Point	166.0±0.0 °C at 760 mmHg
Density	0.8±0.1 g/cm3
Flash Point	53.3±0.0 °C
Exact Mass	112.088814
PSA	17.07000
LogP	2.11
Additional Property	>1 (vs air)
Vapor Pressure	1.8±0.3 mmHg at 25°C
Refractive Index	1.428
Storage Conditions	Refrigerator (+4°C) + Flammables area

GHS Safety & Compliance

Flammable / Acute ToxicitySignal word: Danger

H226 — Flammable liquid and vapour
H302 — Harmful if swallowed
H311 — Toxic in contact with skin
H317 — May cause an allergic skin reaction
H332 — Harmful if inhaled

Frequently Asked Questions

What is the CAS number of trans-2-Heptenal?

The CAS number of trans-2-Heptenal is 18829-55-5.

What are the molecular formula and molecular weight of trans-2-Heptenal?

trans-2-Heptenal has molecular formula C7H12O and molecular weight 112.170 g/mol.

Is trans-2-Heptenal hazardous?

trans-2-Heptenal has GHS signal word Danger and hazard statements H226 — Flammable liquid and vapour; H302 — Harmful if swallowed; H311 — Toxic in contact with skin.

Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.

Last updated: 8/21/2026

How to cite: Jingsj. "trans-2-Heptenal (CAS 18829-55-5)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-29311-8 (accessed 2026-11-09).

Data for reference only; verify product details with suppliers before purchase.