3-Benzylidene-2,4-pentanedione
Also known as: 3-Benzylideneacetylacetone, 3-Benzylidenepentane-2,4-dione, Benzalacetylacetone, Benzylideneacetylacetone, 1,1-Diacetyl-2-phenylethylene, (2,2-Diacetylvinyl)benzene, 2,4-Pentanedione, 3-(phenylmethylene)-, 2,4-Pentanedione, 3-benzylidene-, 3-(Phenylmethylene)pentane-2,4-dione, 3-(Phenylmethylidene)pentane-2,4-dione, 2-Acetyl-1-phenylbut-1-en-3-one
3-Benzylidene-2,4-pentanedione (CAS 4335-90-4) is a compound in the Ketones category listed in the Jingsj chemical database. It has the molecular formula C12H12O2 and a molecular weight of 188.22200 g/mol. Key properties include a boiling point of 185-188 °C15 mm Hg(lit.), a density of 1.081 g/mL at 25 °C(lit.) and a flash point of >110.0 °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 Nov 3, 2026.
- CAS No.
- 4335-90-4
- Jingsj CID
- J-19050-1
- Molecular Formula
- C12H12O2
- Molecular Weight
- 188.22200 g/mol
- Category
- Ketones
- Last updated
- 11/3/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Boiling Point | 185-188 °C15 mm Hg(lit.) |
|---|---|
| Density | 1.081 g/mL at 25 °C(lit.) |
| Flash Point | >110.0 °C |
| Exact Mass | 188.08400 |
| PSA | 34.14000 |
| LogP | 2.24800 |
| Refractive Index | n20/D 1.583(lit.) |
GHS Safety & Compliance
- H315 — Causes skin irritation
- H319 — Causes serious eye irritation
- H335 — May cause respiratory irritation
Customs & Trade Information
| HS Code | 2914399090 |
|---|---|
| Summary | 2914399090. other aromatic ketones without other oxygen function. VAT:17.0%. Tax rebate rate:13.0%. . MFN tariff:5.5%. General tariff:30.0% |
Frequently Asked Questions
What is the CAS number of 3-Benzylidene-2,4-pentanedione?
The CAS number of 3-Benzylidene-2,4-pentanedione is 4335-90-4.
What are the molecular formula and molecular weight of 3-Benzylidene-2,4-pentanedione?
3-Benzylidene-2,4-pentanedione has molecular formula C12H12O2 and molecular weight 188.22200 g/mol.
Is 3-Benzylidene-2,4-pentanedione hazardous?
3-Benzylidene-2,4-pentanedione has GHS signal word Warning and hazard statements H315 — Causes skin irritation; H319 — Causes serious eye irritation; H335 — May cause respiratory irritation.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "3-Benzylidene-2,4-pentanedione (CAS 4335-90-4)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-19050-1 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.