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LS-CMMS Cyclohexylmethyldimethoxysilane Donor C
CAS NO.: 17865-32-6

Name: LS-CMMS Cyclohexylmethyldimethoxysilane Donor C
Brand: Nanjing Silfluo New Material Co., Ltd.
Availability: InStock

Silfluo LS-CMMS is Cyclohexylmethyldimethoxysilane, a bifunctional cycloalkyl-functional dimethoxysilane.

The molecule contains one cyclohexyl group, one methyl group, and two hydrolyzable methoxy groups on silicon.

Widely designated as the C-Donor in the polyolefin industry; functions as external electron donor in MgCl₂-supported Ziegler-Natta catalyst systems for propylene polymerization.

The cyclohexyl and methyl substituents coordinate with catalyst active sites to control stereoselectivity and regioselectivity during propylene homo- and copolymerization.

Performance equivalent to Evonik Dynasylan 9407.

Where to buy CAS NO.: 17865-32-6 PDF Download

Typical Physical Properties of LS-CMMS Cyclohexylmethyldimethoxysilane Donor C

Silfluo Code:	LS-CMMS
Chemical Name: Synonyms	Cyclohexylmethyldimethoxysilane Methylcyclohexyldimethoxysilane; C-DONOR; CHMMS; CMMS; CHMDMS;
CAS No. : EINECS No. :	17865-32-6 629-092-6
Molecular Formula:	C₉H₂₀O₂Si
Molecular Weight:	188.34
Appearance:	Colorless transparent liquid
Purity (by GC, %)	99 min
Density (25°C, g/cm³)	0.945-0.950
Refractive Index (n25/D)	1.4360-1.4380
Boiling Point:	201ºC
Flash Point:	74°C Closed Cup

Applications of LS-CMMS Cyclohexylmethyldimethoxysilane Donor C

1. Propylene homo- and copolymerization

Used as primary external electron donor in MgCl₂-supported Ziegler-Natta catalyst systems for isotactic polypropylene production across bulk, gas-phase, and slurry processes.

2. Catalyst formulation and tuning

Used by catalyst producers to formulate and optimize custom Ziegler-Natta systems for diverse polymerization plant requirements.

Packing of LS-CMMS Cyclohexylmethyldimethoxysilane Donor C

In 180kg drum and 900kg IBC.

Safety and Storage of LS-CMMS Cyclohexylmethyldimethoxysilane Donor C

Store at or below 25°C under nitrogen in a cool, dry, well-ventilated place away from direct sunlight, heat, sparks, and open flames. Keep containers hermetically sealed.

Moisture contact causes hydrolysis, releasing methanol and permanently deactivating Ziegler-Natta catalysts. Handle strictly under dry inert nitrogen atmosphere.

Shelf life: 12 months minimum from manufacture date in original unopened containers stored at or below 25°C.