3,4-Dichloro-1,2,5-thiadiazole
Also known as: 1,2,5-Thiadiazole, 3,4-dichloro-, 3,4-DICHLORO-1,2,5-THIADIAZOLE, 3,4-DICHLORO-1,2,5-THIADIAZOLE 99+%, 3,4-Dichlor-1,2,5-Thiadiazol, 3,4-Dichloro-1,2,5-Triadiazole, 4,5-Dichloro-2,1,3-thiadiazole, DCTD, MFCD00010072
3,4-Dichloro-1,2,5-thiadiazole (CAS 5728-20-1) is a compound in the Organohalogen Compounds category listed in the Jingsj chemical database. It has the molecular formula C2Cl2N2S and a molecular weight of 155.006 g/mol. Key properties include a melting point of 82-83 °C, a boiling point of 158.0±0.0 °C at 760 mmHg, a density of 1.7±0.1 g/cm3 and a flash point of 49.7±21.8 °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.
- 5728-20-1
- Jingsj CID
- J-47517-4
- Molecular Formula
- C2Cl2N2S
- Molecular Weight
- 155.006 g/mol
- Category
- Organohalogen Compounds
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | 82-83 °C |
|---|---|
| Boiling Point | 158.0±0.0 °C at 760 mmHg |
| Density | 1.7±0.1 g/cm3 |
| Flash Point | 49.7±21.8 °C |
| Exact Mass | 153.915924 |
| PSA | 54.02000 |
| LogP | 2.77 |
| Vapor Pressure | 3.5±0.2 mmHg at 25°C |
| Refractive Index | 1.602 |
GHS Safety & Compliance
- H315 — Causes skin irritation
- H319 — Causes serious eye irritation
- H335 — May cause respiratory irritation
Customs & Trade Information
| HS Code | 2934999090 |
|---|---|
| Summary | 2934999090. other heterocyclic compounds. VAT:17.0%. Tax rebate rate:13.0%. . MFN tariff:6.5%. General tariff:20.0% |
Frequently Asked Questions
What is the CAS number of 3,4-Dichloro-1,2,5-thiadiazole?
The CAS number of 3,4-Dichloro-1,2,5-thiadiazole is 5728-20-1.
What are the molecular formula and molecular weight of 3,4-Dichloro-1,2,5-thiadiazole?
3,4-Dichloro-1,2,5-thiadiazole has molecular formula C2Cl2N2S and molecular weight 155.006 g/mol.
Is 3,4-Dichloro-1,2,5-thiadiazole hazardous?
3,4-Dichloro-1,2,5-thiadiazole 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 3,4-Dichloro-1,2,5-thiadiazole?
For 3,4-Dichloro-1,2,5-thiadiazole, Upstream Products: Aminoacetonitrile, Dichloroglyoxime, cyanogen; Downstream Products: 1-(4-chloro-1,2,5-thiadiazol-3-yl)azepane, 3-chloro-4-phenyl-1,2,5-thiadiazole, 3-Chloro-1,2-benzisothiazole.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "3,4-Dichloro-1,2,5-thiadiazole (CAS 5728-20-1)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-47517-4 (accessed 2026-11-06).
Data for reference only; verify product details with suppliers before purchase.