CAS No.70131-67-8,SILANOL TERMINATED POLYDIMETHYLSILOXANE Suppliers,MSDS download

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Basic Information

Molecular Structure:
CAS No.:	70131-67-8
Name:	SILANOL TERMINATED POLYDIMETHYLSILOXANE

Formula:	HO[-Si(CH₃)₂O-]_nH
Molecular Weight:	45.09284
Synonyms:	Siloxanes and silicones, di-Me, hydroxy-terminated;Hydroxy Silicone Oil;Hydroxy Terminated Silicone;Poly(oxy(dimethylsilylene), alpha-hydro, omega-hydroxy-;Polydimethylsiloxane, hydroxy end-blocked;Silanol-terminated di-Me siloxanes;alpha-Hydro-omega-hydroxypoly(dimethylsiloxane);Siloxanes and Silicones di-Me, hydroxy-terminated 42% in dimethyl hydrolyzate;OH-Polymer;
EINECS:	615-070-3
Density:	0.98 g/mL at 25 °C
Melting Point:	<-60°C
Boiling Point:	182 °C
Flash Point:	155 °F
Solubility:	Soluble in carbon tetrachloride, benzene, chloroform, diethyl ether, toluene and other organic solvents. Insoluble in water and ethanol.
Hazard Symbols:	Xi
Risk Codes:	36/37/38
Safety:	23-24/25-36-26
PSA:	0.00000
LogP:	0.00000

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Specification

The systematic name of Polysiloxanes di-Me hydroxy-terminated is Siloxanes and Silicones di-Me, hydroxy-terminated 42% in dimethyl hydrolyzate. With the CAS registry number 70131-67-8, it is also named as Poly(oxy(dimethylsilylene), alpha-hydro, omega-hydroxy-. The product's categories are PDMS Elastomers / Resins Polymer Science; Polysiloxanes; Self Assembly & Contact Printing; Silicones; Stamps for Nanoprint Lithography & Microcontact Printing; Polymer Science. It is colorless viscous liquid which should be sealed in the container and stored in the cool and dry place.

Preparation of Polysiloxanes di-Me hydroxy-terminated: It can be obtained by the telomerization of dimethylcyclosiloxane and hexamethyldisiloxane in the presence of catalytic agent.

Uses of Polysiloxanes di-Me hydroxy-terminated: It is widely used in the afterfinish of synthetic fibers, silk, cotton and other fiber and fabric.

When you are using this chemical, please be cautious about it as the following:
It is irritating to eyes, respiratory system and skin, so people should not breathe vapour and avoid contact with skin and eyes. In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. If you want to contact this product, you must wear suitable protective clothing.

The following are the toxicity data which has been tested.

Organism	Test Type	Route	Reported Dose (Normalized Dose)	Effect	Source
rabbit	LD50	skin	> 16mL/kg (16mL/kg)	KIDNEY, URETER, AND BLADDER: OTHER CHANGES	National Technical Information Service. Vol. OTS0572497,
rabbit	LD50	skin	> 2gm/kg (2000mg/kg)		National Technical Information Service. Vol. OTS0590158,
rat	LC50	inhalation	> 8750mg/m³/7H (8750mg/m³)	LUNGS, THORAX, OR RESPIRATION: OTHER CHANGES	National Technical Information Service. Vol. OTS0590158,
rat	LD50	oral	> 64mL/kg (64mL/kg)	GASTROINTESTINAL: OTHER CHANGES LIVER: OTHER CHANGES	National Technical Information Service. Vol. OTS0572497,
rat	LD50	oral	> 15400mg/kg (15400mg/kg)	SENSE ORGANS AND SPECIAL SENSES: PTOSIS: EYE BEHAVIORAL: SOMNOLENCE (GENERAL DEPRESSED ACTIVITY) KIDNEY, URETER, AND BLADDER: URINE VOLUME INCREASED	National Technical Information Service. Vol. OTS0590158,