Thidiazuron
Also known as: 1-Phenyl-3-(1,2,3-thiadiazol-5-yl)urea, N-Phenyl-N'-1,2,3-thiadiazol-5-ylurea, TDZ, Dropp, Defolit, Urea, N-phenyl-N'-1,2,3-thiadiazol-5-yl-
Thidiazuron (CAS 51707-55-2) is a compound in the Aromatic Hydrocarbons category listed in the Jingsj chemical database. It has the molecular formula C9H8N4OS and a molecular weight of 220.25 g/mol. Key properties include a melting point of 213°C, a boiling point of 410.5±55.0 °C at 760 mmHg, a density of 1.5±0.1 g/cm3 and a flash point of 202.1±31.5 °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.
- 51707-55-2
- Jingsj CID
- J-1102144-3
- Molecular Formula
- C9H8N4OS
- Molecular Weight
- 220.25 g/mol
- Category
- Aromatic Hydrocarbons
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | 213°C |
|---|---|
| Boiling Point | 410.5±55.0 °C at 760 mmHg |
| Density | 1.5±0.1 g/cm3 |
| Flash Point | 202.1±31.5 °C |
| Exact Mass | 220.041885 |
| PSA | 95.15000 |
| LogP | 1.81 |
| Vapor Pressure | 0.0±1.0 mmHg at 25°C |
| Refractive Index | 1.722 |
GHS Safety & Compliance
- H315 — Causes skin irritation
- H319 — Causes serious eye irritation
- H335 — May cause respiratory irritation
- H410 — Very toxic to aquatic life with long lasting effects
Frequently Asked Questions
What is the CAS number of Thidiazuron?
The CAS number of Thidiazuron is 51707-55-2.
What are the molecular formula and molecular weight of Thidiazuron?
Thidiazuron has molecular formula C9H8N4OS and molecular weight 220.25 g/mol.
Is Thidiazuron hazardous?
Thidiazuron 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. "Thidiazuron (CAS 51707-55-2)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1102144-3 (accessed 2026-11-07).
Data for reference only; verify product details with suppliers before purchase.