4-Phenyl-1,2,4-triazoline-3,5-dione
Also known as: PTAD, 4-Phenyldehydrourazole, 3,5-Dihydro-4-phenyl-4H-1,2,4-triazole-3,5-dione, 4-Phenyl-3H-1,2,4-triazole-3,5(4H)-dione, 4-Phenyl-3,5-dihydro-4H-1,2,4-triazole-3,5-dione
4-Phenyl-1,2,4-triazoline-3,5-dione (CAS 4233-33-4) is a compound in the Ketones category listed in the Jingsj chemical database. It has the molecular formula C8H5N3O2 and a molecular weight of 175.144 g/mol. Key properties include a melting point of 165-170 °C (dec.)(lit.), a boiling point of 263.8±23.0 °C at 760 mmHg, a density of 1.5±0.1 g/cm3 and a flash point of 113.3±22.6 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 4233-33-4
- Jingsj CID
- J-17938-8
- Molecular Formula
- C8H5N3O2
- Molecular Weight
- 175.144 g/mol
- Category
- Ketones
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | 165-170 °C (dec.)(lit.) |
|---|---|
| Boiling Point | 263.8±23.0 °C at 760 mmHg |
| Density | 1.5±0.1 g/cm3 |
| Flash Point | 113.3±22.6 °C |
| Exact Mass | 175.038177 |
| PSA | 62.10000 |
| LogP | -0.25 |
| Vapor Pressure | 0.0±0.5 mmHg at 25°C |
| Refractive Index | 1.701 |
Frequently Asked Questions
What is the CAS number of 4-Phenyl-1,2,4-triazoline-3,5-dione?
The CAS number of 4-Phenyl-1,2,4-triazoline-3,5-dione is 4233-33-4.
What are the molecular formula and molecular weight of 4-Phenyl-1,2,4-triazoline-3,5-dione?
4-Phenyl-1,2,4-triazoline-3,5-dione has molecular formula C8H5N3O2 and molecular weight 175.144 g/mol.
What are the upstream and downstream products of 4-Phenyl-1,2,4-triazoline-3,5-dione?
For 4-Phenyl-1,2,4-triazoline-3,5-dione, Upstream Products: 4-Phenylurazole, Ethyl 3-(N-phenylcarbamoyl)carbazate; Downstream Products: 2-Adamantanone, 4-Phenylurazole, 1,3-Diphenylurea.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "4-Phenyl-1,2,4-triazoline-3,5-dione (CAS 4233-33-4)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-17938-8 (accessed 2026-11-06).
Data for reference only; verify product details with suppliers before purchase.