1,4-Bis(diphenylphosphino)butane

Also known as: Tetramethylenebis(diphenylphosphine), Butane-1,4-diylbis(diphenylphosphine), 1,4-Butanediylbis(diphenylphosphine), DPPB, 1,1'-(1,4-Butanediyl)bis[1,1-diphenylphosphine], Phosphine, 1,4-butanediylbis(diphenyl-

1,4-Bis(diphenylphosphino)butane (CAS 7688-25-7) is a compound in the Aromatic Hydrocarbons category listed in the Jingsj chemical database. It has the molecular formula C28H28P2 and a molecular weight of 426.47 g/mol. Key properties include a melting point of 132-136 °C(lit.), a boiling point of 542.0±33.0 °C at 760 mmHg and a flash point of 299.5±31.7 °C. It is classified under GHS with signal word Warning and hazard statements H315 — Causes skin irritation, H319 — Causes serious eye irritation and H413. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 7688-25-7
Jingsj CID: J-2417-9
Molecular Formula: C₂₈H₂₈P₂
Molecular Weight: 426.47 g/mol
Category: Aromatic Hydrocarbons
Last updated: 8/21/2026

Request MSDS / TDS

No offers for this compound yet.

Request a quote

Physicochemical Properties

Melting Point	132-136 °C(lit.)
Boiling Point	542.0±33.0 °C at 760 mmHg
Flash Point	299.5±31.7 °C
Exact Mass	426.166626
PSA	27.18000
LogP	9.25
Vapor Pressure	0.0±1.4 mmHg at 25°C

GHS Safety & Compliance

IrritantSignal word: Warning

H315 — Causes skin irritation
H319 — Causes serious eye irritation
H413

Customs & Trade Information

HS Code	2902909090
Summary	2902909090 other aromatic hydrocarbons。Supervision conditions:None。VAT:17.0%。Tax rebate rate:9.0%。MFN tariff:2.0%。General tariff:30.0%

Frequently Asked Questions

What is the CAS number of 1,4-Bis(diphenylphosphino)butane?

The CAS number of 1,4-Bis(diphenylphosphino)butane is 7688-25-7.

What are the molecular formula and molecular weight of 1,4-Bis(diphenylphosphino)butane?

1,4-Bis(diphenylphosphino)butane has molecular formula C28H28P2 and molecular weight 426.47 g/mol.

Is 1,4-Bis(diphenylphosphino)butane hazardous?

1,4-Bis(diphenylphosphino)butane has GHS signal word Warning and hazard statements H315 — Causes skin irritation; H319 — Causes serious eye irritation; H413.

What are the upstream and downstream products of 1,4-Bis(diphenylphosphino)butane?

For 1,4-Bis(diphenylphosphino)butane, Upstream Products: 1,4-Dibromobutane, Diphenylphosphine, Chlorodiphenylphosphine; Downstream Products: Norbornadiene, Methyl (E)-3-pentenoate, Bis[1,2-bis(diphenylphosphino)ethane]palladium(0).

Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.

Last updated: 8/21/2026

How to cite: Jingsj. "1,4-Bis(diphenylphosphino)butane (CAS 7688-25-7)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-2417-9 (accessed 2026-11-09).

Data for reference only; verify product details with suppliers before purchase.