1,4-Diiodobutane
Also known as: Tetramethylene diiodide, Tetramethylene iodide, Butane, 1,4-diiodo-, 1,4-Diiodobutane (stabilized with copper chip), 1,4-Diiodobutane >=99%, contains copper as stabilizer
1,4-Diiodobutane (CAS 628-21-7) is a compound in the Aliphatic Hydrocarbons category listed in the Jingsj chemical database. It has the molecular formula C4H8I2 and a molecular weight of 309.915 g/mol. Key properties include a melting point of 6 °C(lit.), a boiling point of 246.1±8.0 °C at 760 mmHg, a density of 2.3±0.1 g/cm3 and a flash point of 116.7±13.9 °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.
- 628-21-7
- Jingsj CID
- J-887715-4
- Molecular Formula
- C4H8I2
- Molecular Weight
- 309.915 g/mol
- Category
- Aliphatic Hydrocarbons
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | 6 °C(lit.) |
|---|---|
| Boiling Point | 246.1±8.0 °C at 760 mmHg |
| Density | 2.3±0.1 g/cm3 |
| Flash Point | 116.7±13.9 °C |
| Exact Mass | 309.871521 |
| LogP | 3.44 |
| Vapor Pressure | 0.0±0.5 mmHg at 25°C |
| Refractive Index | 1.621 |
| Additional Property | insoluble |
GHS Safety & Compliance
- H315 — Causes skin irritation
- H319 — Causes serious eye irritation
- H335 — May cause respiratory irritation
Customs & Trade Information
| HS Code | 2903399090 |
|---|---|
| Summary | 2903399090. brominated,fluorinated or iodinated derivatives of acyclic hydrocarbons. 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 1,4-Diiodobutane?
The CAS number of 1,4-Diiodobutane is 628-21-7.
What are the molecular formula and molecular weight of 1,4-Diiodobutane?
1,4-Diiodobutane has molecular formula C4H8I2 and molecular weight 309.915 g/mol.
Is 1,4-Diiodobutane hazardous?
1,4-Diiodobutane 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 1,4-Diiodobutane?
For 1,4-Diiodobutane, Upstream Products: 1,4-Dibromobutane, 1,4-Dichlorobutane, Tetrahydrofuran; Downstream Products: 1-Phenylpyrrolidine, delta-Valerolactone, 1-Iodobutane.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "1,4-Diiodobutane (CAS 628-21-7)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-887715-4 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.