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Polysiloxanes di-Me hydroxy-terminated

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Name

Polysiloxanes di-Me hydroxy-terminated

EINECS 615-070-3
CAS No. 70131-67-8 Density 0.98 g/mL at 25 °C
PSA 0.00000 LogP 0.00000
Solubility Soluble in carbon tetrachloride, benzene, chloroform, diethyl ether, toluene and other organic solvents. Insoluble in water and ethanol. Melting Point <-60°C
Formula HO[-Si(CH3)2O-]nH Boiling Point 182 °C
Molecular Weight 45.09284 Flash Point 155 °F
Transport Information N/A Appearance N/A
Safety 23-24/25-36-26 Risk Codes 36/37/38
Molecular Structure Molecular Structure of 70131-67-8 (SILANOL TERMINATED POLYDIMETHYLSILOXANE) Hazard Symbols Xi
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;

 

Polysiloxanes di-Me hydroxy-terminated 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,

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