PENTAMETHYLCYCLOPENTASILOXANE

CAS No.：6166-86-5

Important Notice

This product is a chemical product/pharmaceutical intermediate. It is not a drug, an active pharmaceutical ingredient (API), or a pharmaceutical-grade material. It has not been granted a drug approval number or a Chemical Drug Substance Approval Notice, has not passed drug-related review and approval, and is not manufactured, tested, or released in accordance with pharmaceutical GMP.
This product is intended solely for non-clinical research, process development, quality studies, further chemical processing, or chemical synthesis. It must not be used in drug-product manufacturing, clinical trials, clinical diagnosis, or administration to humans or animals, or be sold, used as an input, submitted for regulatory filing, or released as an API or pharmaceutical material.
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PENTAMETHYLCYCLOPENTASILOXANE Basic information

Product Name:	PENTAMETHYLCYCLOPENTASILOXANE
Synonyms:	2,4,6,8,10-pentamethyl-1,3,5,7,9,2,4,6,8,10-pentaoxapentasilecane;2,4,6,8,10-pentamethyl-1,3,5,7,9,2λ³,4λ³,6λ³,8λ³,10λ³-pentaoxapentasilecane;2,4,6,8,10-PENTAMETHYLCYCLOPENTASILOXANE;PENTAMETHYLCYCLOPENTASILOXANE;PENTAMETHYLCYCLOPENTASILOXANE CONTAINS OTHER CYCLIC HOMOLOGS;2,4,6 8,10-PENTAMETHYLCYCLOPENTASILOXANE TECH 90+%;PENTAMETHYLCYCLOPENTASILOXANE: 90% CONTAINS OTHER CYCLIC HOMOLOGS;2,4,6,8,10-Pentamethylcyclodecanepentasiloxane
CAS:	6166-86-5
MF:	C5H20O5Si5
MW:	300.64
EINECS:	228-204-7
Product Categories:	Organometallic Reagents;SiliconOrganometallic Reagents;Organosilicon;Precursors by Metal;Siloxanes;Vapor Deposition Precursors;Chemical Synthesis;CVD and ALD Precursors by Metal;Materials Science;Micro/NanoElectronics;Organometallic Reagents;Silicon;Vapor Deposition Precursors
Mol File:	6166-86-5.mol

PENTAMETHYLCYCLOPENTASILOXANE Chemical Properties

Melting point	-108°C
Boiling point	54 °C/10 mmHg (lit.)
density	0.992 g/mL at 25 °C (lit.)
vapor pressure	0.05-91Pa at 20℃
refractive index	n20/D 1.392(lit.)
Fp	39°C
storage temp.	2-8°C
form	liquid
Specific Gravity	0.998
Water Solubility	110-1000000000μg/L at 20℃
Hydrolytic Sensitivity	3: reacts with aqueous base
BRN	1792134
LogP	-2.4-6.33 at 20℃
EPA Substance Registry System	Cyclopentasiloxane, 2,4,6,8,10-pentamethyl- (6166-86-5)

Safety Information

Hazard Codes	Xi
Risk Statements	10-36/37/38
Safety Statements	16-26-36
RIDADR	UN 1993 3/PG 3
WGK Germany	3
F	10-21
TSCA	Yes

MSDS Information

Provider	Language
SigmaAldrich	English

PENTAMETHYLCYCLOPENTASILOXANE Usage And Synthesis

Flammability and Explosibility

Flammable

PENTAMETHYLCYCLOPENTASILOXANE Preparation Products And Raw materials

Raw materials	Dichloromethylsilane
Preparation Products	1,1,1,3,5,5,5-Heptamethyltrisiloxane-->2,4,6,8-TETRAMETHYLCYCLOTETRASILOXANE-->2 4 6-TRIMETHYLCYCLOTRISILOXANE 99-->1,3-BIS(TRIMETHYLSILOXY)-1,3-DIMETHYLDISILOXANE

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