1,2-Dimethyl-1,1,2,2-tetraphenyldisilane

Also known as: 1,1,2,2-Tetraphenyl-1,2-dimethyldisilane, 1,1-Dimethyl-1,1,2,2-tetraphenyldisilane, 1,2-Dimethyltetraphenyldisilane, Methyl-[methyl(diphenyl)silyl]-diphenylsilane, Ph2MeSi-SiMePh2, Disilane, 1,2-dimethyl-1,1,2,2-tetraphenyl-, Benzene, 1,1',1'',1'''-(1,2-dimethyl-1,2-disilanediylidene)tetrakis-

1,2-Dimethyl-1,1,2,2-tetraphenyldisilane (CAS 1172-76-5) is a compound in the Aromatic Hydrocarbons category listed in the Jingsj chemical database. It has the molecular formula C26H26Si2 and a molecular weight of 394.656 g/mol. Key properties include a melting point of 138ºC to 144ºC, a boiling point of 451.2±18.0 °C at 760 mmHg, a density of 1.1±0.1 g/cm3 and a flash point of 207.3±14.3 °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.: 1172-76-5
Jingsj CID: J-1994142-5
Molecular Formula: C₂₆H₂₆Si₂
Molecular Weight: 394.656 g/mol
Category: Aromatic Hydrocarbons
Last updated: 8/21/2026

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Physicochemical Properties

Melting Point	138ºC to 144ºC
Boiling Point	451.2±18.0 °C at 760 mmHg
Density	1.1±0.1 g/cm3
Flash Point	207.3±14.3 °C
Exact Mass	394.157318
LogP	9.51
Vapor Pressure	0.0±1.1 mmHg at 25°C
Refractive Index	1.600

GHS Safety & Compliance

IrritantSignal word: Warning

H315 — Causes skin irritation
H319 — Causes serious eye irritation
H335 — May cause respiratory irritation

Customs & Trade Information

HS Code	2931900090
Summary	2931900090. other organo-inorganic compounds. VAT:17.0%. Tax rebate rate:13.0%. Supervision conditions:AB(certificate of inspection for goods inward,certificate of inspection for goods outward). MFN tariff:6.5%. General tariff:30.0%

Frequently Asked Questions

What is the CAS number of 1,2-Dimethyl-1,1,2,2-tetraphenyldisilane?

The CAS number of 1,2-Dimethyl-1,1,2,2-tetraphenyldisilane is 1172-76-5.

What are the molecular formula and molecular weight of 1,2-Dimethyl-1,1,2,2-tetraphenyldisilane?

1,2-Dimethyl-1,1,2,2-tetraphenyldisilane has molecular formula C26H26Si2 and molecular weight 394.656 g/mol.

Is 1,2-Dimethyl-1,1,2,2-tetraphenyldisilane hazardous?

1,2-Dimethyl-1,1,2,2-tetraphenyldisilane 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 1,2-Dimethyl-1,1,2,2-tetraphenyldisilane?

For 1,2-Dimethyl-1,1,2,2-tetraphenyldisilane, Upstream Products: Chlorodiphenylmethylsilane, Methyldiphenylsilane, 1-Chloro-2,2-dimethylpropane; Downstream Products: 1,2-dimethyl-1,1,2,2-tetrachlorodisilane, hydroxymethyldiphenylsilane, 1,1,3,3-Tetraphenyl-1,3-dimethyldisiloxane.

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-Dimethyl-1,1,2,2-tetraphenyldisilane (CAS 1172-76-5)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1994142-5 (accessed 2026-11-09).

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