3-Mercaptopropylmethyldimethoxysilane Chemical Properties

Boiling point:

96 °C/30 mmHg (lit.)

Density 

1 g/mL at 25 °C (lit.)

vapor pressure 

23-12790Pa at 20-25℃

refractive index 

n20/D 1.45(lit.)

Flash point:

199°F

form 

Liquid

pka

10.40±0.10(Predicted)

Specific Gravity

1.0

color 

Colorless

Water Solubility 

Insoluble in water.

Sensitive 

Moisture Sensitive

Hydrolytic Sensitivity

7: reacts slowly with moisture/water

BRN 

2424867

LogP

-0.82-2.9 at 20℃

CAS DataBase Reference

31001-77-1(CAS DataBase Reference)

EPA Substance Registry System

1-Propanethiol, 3-(dimethoxymethylsilyl)- (31001-77-1)

Safety Information

Hazard Codes 

Xi

Risk Statements 

36/37/38

Safety Statements 

26-36

RIDADR 

UN2924

WGK Germany 

3

F 

10-23

TSCA 

Yes

HazardClass 

3

PackingGroup 

III

HS Code 

29319090

MSDS

• Language:English Provider:SigmaAldrich
• Language:English Provider:ALFA

3-Mercaptopropylmethyldimethoxysilane Usage And Synthesis

Introduction

3-Mercaptopropylmethyldimethoxysilane is a bifunctional organosilane possessing a reactive organic mercapto and a hydrolyzable inorganic methoxysilyl group. 3-Mercaptopropylmethyldimethoxysilane is a clear, colorless to light yellow liquid with a slightly mercaptan odor. It is soluble in alcohols, ketones and aliphatic or aromatic hydrocarbons.

Applications:

• 3-Mercaptopropylmethyldimethoxysilane can be used as coupling agent to improve the adhesion of sulfur cured elastomers (polysulfide, polyurethane sealants) to inorganic fillers (such as silica, clay, glass, mica and talc etc.), fiberglass and surfaces. Mineral-reinforced articles such as shoe soles, rubber rollers and wheels, white sidewalls, and wire and cable insulation also can be produced with lower silane loadings.
• Used to improve properties of mineral filled elastomer, including modulus, tensile and tear strength, heat buildup, abrasion resistance, resilience, compression set and cure time.
• Used as a pretreatment on minerals or added at the time of compounding.
• Used to improve low-rolling resistance in silica-reinforced tire tread compounds.

Chemical Properties

Clear to straw liquid with unpleasant odor of sulfide.

Uses

3-Mercaptopropylmethyldimethoxysilane can be used to prepare UV laminated adhesive.

Uses

(3-Mercaptopropyl)methyldimethoxysilane (MPMDMS) can be used as a silane precursor in the synthesis of:

• Nafion-MPMDMS nanocomposite membranes by sol-gel method.
• MPMDMS functionalized magnetic- polysilsesquioxane (PSSQ) nanoparticles applicable for heavy metal ions adsorption.
• Thiol-organosilica nanoparticles.

Flammability and Explosibility

Not classified

3-Mercaptopropylmethyldimethoxysilane(31001-77-1)Related Product Information

• 3-Chloropropyltrimethoxysilane
• Dimethyldimethoxysilane
• Tetramethyl orthosilicate
• 3-Aminopropyltrimethoxysilane
• Methyltriethoxysilane
• Dimethoxymethylphenylsilane
• Triethoxyvinylsilane
• Trimethoxysilane
• Tetraethyl orthosilicate
• Trimethoxysilylpropanethiol
• Trimethoxypropylsilane
• Methyldimethoxysilane
• Methyltrimethoxysilane
• Vinyltrimethoxysilane
• SILANE COUPLING AGENT
• Silicon
• 1-Propanethiol
• METHYLSILANE