trans-Vaccenic acid
Also known as: (E)-11-octadecenoic acid, (E)-octadec-11-enoic acid, 11-trans-octadecenoic acid, Vaccenic acid, trans-11-octadecenoic acid, trans-11-oleic acid
trans-Vaccenic acid (CAS 693-72-1) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C18H34O2 and a molecular weight of 282.461 g/mol. Key properties include a melting point of 44℃, a boiling point of 398.2±11.0 °C at 760 mmHg, a density of 0.9±0.1 g/cm3 and a flash point of 295.0±14.4 °C. It is classified under GHS with signal word Warning and hazard statements H315 — Causes skin irritation, H319 — Causes serious eye irritation and H335 — May cause respiratory irritation. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 693-72-1
- Jingsj CID
- J-1957376-3
- Molecular Formula
- C18H34O2
- Molecular Weight
- 282.461 g/mol
- Category
- Organic Acids
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | 44℃ |
|---|---|
| Boiling Point | 398.2±11.0 °C at 760 mmHg |
| Density | 0.9±0.1 g/cm3 |
| Flash Point | 295.0±14.4 °C |
| Exact Mass | 282.255890 |
| PSA | 37.30000 |
| LogP | 7.70 |
| Vapor Pressure | 0.0±2.0 mmHg at 25°C |
| Refractive Index | 1.467 |
| Storage Conditions | −20°C |
GHS Safety & Compliance
- H315 — Causes skin irritation
- H319 — Causes serious eye irritation
- H335 — May cause respiratory irritation
Activity & Biological Data
| Target | Human Endogenous Metabolite |
|---|---|
| Additional Information | [1]. Li D, et al. Ruminal microbe of biohydrogenation of trans-vaccenic acid to stearic acid in vitro. BMC Res Notes. 2012 Feb 15;5:97. |
Frequently Asked Questions
What is the CAS number of trans-Vaccenic acid?
The CAS number of trans-Vaccenic acid is 693-72-1.
What are the molecular formula and molecular weight of trans-Vaccenic acid?
trans-Vaccenic acid has molecular formula C18H34O2 and molecular weight 282.461 g/mol.
Is trans-Vaccenic acid hazardous?
trans-Vaccenic acid has GHS signal word Warning and hazard statements H315 — Causes skin irritation; H319 — Causes serious eye irritation; H335 — May cause respiratory irritation.
What are the upstream and downstream products of trans-Vaccenic acid?
For trans-Vaccenic acid, Upstream Products: Methyl cis-11-octadecenoate, Butylmagnesium chloride, cis-Vaccenic acid; Downstream Products: Undecanedioic acid.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "trans-Vaccenic acid (CAS 693-72-1)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1957376-3 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.