(-)-1,2-Bis((2S,5S)-2,5-dimethylphospholano)ethane

Also known as: (S,S)-Me-BPE, (-)-1,2-Bis[(2S,5S)-2,5-dimethylphospholano]ethane, (2S,5S)-1-[2-[(2S,5S)-2,5-dimethylphospholan-1-yl]ethyl]-2,5-dimethylphospholane, MFCD01073771

(-)-1,2-Bis((2S,5S)-2,5-dimethylphospholano)ethane (CAS 136779-26-5) is a compound in the Aliphatic Hydrocarbons category listed in the Jingsj chemical database. It has the molecular formula C14H28P2 and a molecular weight of 258.32000 g/mol. Key properties include a boiling point of 64-67ºC0.06 mm Hg, a density of 0.938 g/mL at 25ºC and a flash point of 162.1ºC. It is classified under GHS with signal word Danger and hazard statements H250. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 136779-26-5
Jingsj CID: J-1084860-9
Molecular Formula: C₁₄H₂₈P₂
Molecular Weight: 258.32000 g/mol
Category: Aliphatic Hydrocarbons
Last updated: 8/21/2026

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Physicochemical Properties

Boiling Point	64-67ºC0.06 mm Hg
Density	0.938 g/mL at 25ºC
Flash Point	162.1ºC
Exact Mass	258.16700
PSA	27.18000
LogP	5.09180
Vapor Pressure	0.000285mmHg at 25°C
Refractive Index	n20/D 1.535

GHS Safety & Compliance

FlammableSignal word: Danger

H250

Frequently Asked Questions

What is the CAS number of (-)-1,2-Bis((2S,5S)-2,5-dimethylphospholano)ethane?

The CAS number of (-)-1,2-Bis((2S,5S)-2,5-dimethylphospholano)ethane is 136779-26-5.

What are the molecular formula and molecular weight of (-)-1,2-Bis((2S,5S)-2,5-dimethylphospholano)ethane?

(-)-1,2-Bis((2S,5S)-2,5-dimethylphospholano)ethane has molecular formula C14H28P2 and molecular weight 258.32000 g/mol.

Is (-)-1,2-Bis((2S,5S)-2,5-dimethylphospholano)ethane hazardous?

(-)-1,2-Bis((2S,5S)-2,5-dimethylphospholano)ethane has GHS signal word Danger and hazard statements H250.

What are the upstream and downstream products of (-)-1,2-Bis((2S,5S)-2,5-dimethylphospholano)ethane?

For (-)-1,2-Bis((2S,5S)-2,5-dimethylphospholano)ethane, Upstream Products: (2R,5R)-2,5-Hexanediol, 1,2-bis(phosphino)ethane, 1,2-bis(tosyloxy)ethane.

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. "(-)-1,2-Bis((2S,5S)-2,5-dimethylphospholano)ethane (CAS 136779-26-5)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1084860-9 (accessed 2026-11-09).

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