4,4'-Dithiodipyridine
Also known as: 4,4'-Dipyridyl disulfide, Bis(4-pyridyl) disulfide, Di(4-pyridinyl) disulfide, 4,4'-Dipyridine disulfide, Aldrithiol-4, Aldrithiol™-4, 4,4'-Dithiopyridine, 4-Pyridyl disulfide, 1,2-Di(pyridin-4-yl)disulfane, DTDP
4,4'-Dithiodipyridine (CAS 2645-22-9) is a compound in the Pharma Intermediates category listed in the Jingsj chemical database. It has the molecular formula C10H8N2S2 and a molecular weight of 220.31400 g/mol. Key properties include a melting point of 76-78 °C(lit.), a boiling point of 356.1ºC at 760 mmHg, a density of 1.34 g/cm3 and a flash point of 169.2ºC. 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.
- 2645-22-9
- Jingsj CID
- J-19842-5
- Molecular Formula
- C10H8N2S2
- Molecular Weight
- 220.31400 g/mol
- Category
- Pharma Intermediates
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | 76-78 °C(lit.) |
|---|---|
| Boiling Point | 356.1ºC at 760 mmHg |
| Density | 1.34 g/cm3 |
| Flash Point | 169.2ºC |
| Exact Mass | 220.01300 |
| PSA | 76.38000 |
| LogP | 3.27600 |
| Vapor Pressure | 6.14E-05mmHg at 25°C |
| Refractive Index | 1.693 |
GHS Safety & Compliance
- H315 — Causes skin irritation
- H319 — Causes serious eye irritation
- H335 — May cause respiratory irritation
Customs & Trade Information
| HS Code | 2933399090 |
|---|---|
| Summary | 2933399090. other compounds containing an unfused pyridine ring (whether or not hydrogenated) in the structure. 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 4,4'-Dithiodipyridine?
The CAS number of 4,4'-Dithiodipyridine is 2645-22-9.
What are the molecular formula and molecular weight of 4,4'-Dithiodipyridine?
4,4'-Dithiodipyridine has molecular formula C10H8N2S2 and molecular weight 220.31400 g/mol.
Is 4,4'-Dithiodipyridine hazardous?
4,4'-Dithiodipyridine 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 4,4'-Dithiodipyridine?
For 4,4'-Dithiodipyridine, Upstream Products: 4-Mercaptopyridine, 1-(4-Pyridyl)pyridinium chloride hydrochloride, 4-chloropyridine; Downstream Products: 4-Mercaptopyridine, 2,2'-Dithiodiethanol, Pyridine-4-sulfonic 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. "4,4'-Dithiodipyridine (CAS 2645-22-9)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-19842-5 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.