3-Chloropropyltrimethoxysilane

Synonym(s):(3-Chloropropyl)trimethoxysilane;CPTMO;3-(Chloropropyl)-trimethoxysilane;3-(Trimethoxysilyl)propyl chloride;δ-Chloropropyltrimethoxysilane

CAS NO.：2530-87-2
Empirical Formula: C6H15ClO3Si
Molecular Weight: 198.72
MDL number: MFCD00000997
EINECS: 219-787-9
SAFETY DATA SHEET (SDS)
Update Date: 2026-07-30 17:03:33

3-Chloropropyltrimethoxysilane Structural

What is 3-Chloropropyltrimethoxysilane?

Description

(3-Chloropropyl)trimethoxysilane is a silane coupling agent that is commonly used in the field of chemistry. It is a colorless and transparent liquid that has a strong odor. It is used as a coupling agent in the polymer industry to improve the adhesion between two substrates. It is also a starting material for synthesizing various compounds, such as surfactants, organosilanes, and other functional molecules.

Chemical properties

Colorless transparent liquid

The Uses of 3-Chloropropyltrimethoxysilane

(3-Chloropropyl)trimethoxysilane may be used in the synthesis of octakis(3-chloropropyl)octasilsesquioxane.{35}

The Uses of 3-Chloropropyltrimethoxysilane

(3-Chloropropyl)trimethoxysilane is a good coupling agent for epoxy resins to glass in laminates.

General Description

(3-Chloropropyl)trimethoxysilane (CPTMS) is an organo-silane which forms a self-assembled monolayer (SAMs) that facilitates the surface modification of different bio-and nano- materials.

Hazard

A poison by ingestion and skin contact.

Flammability and Explosibility

Not classified

Properties of 3-Chloropropyltrimethoxysilane

Melting point:	-50°C
Boiling point:	195 °C750 mm Hg(lit.)
Density	1.09 g/mL at 25 °C(lit.)
vapor pressure	<5 hPa (20 °C)
refractive index	n20/D 1.419(lit.)
Flash point:	136 °F
storage temp.	Store below +30°C.
solubility	Miscible with organic solvents.
form	Liquid
pka	10[at 20 ℃]
Specific Gravity	1.077
color	Clear colorless to slightly yellow
explosive limit	5.5-44%(V)
Water Solubility	Hydrolyzes in water.
Sensitive	Moisture Sensitive
Hydrolytic Sensitivity	7: reacts slowly with moisture/water
BRN	969627
Stability:	Stable, but air and moisture sensitive. Incompatible with water, moisture, strong oxidizing agents, air. Store under an inert and dry atmosphere.
CAS DataBase Reference	2530-87-2(CAS DataBase Reference)
NIST Chemistry Reference	Silane, (3-chloropropyl)trimethoxy-(2530-87-2)
EPA Substance Registry System	(3-Chloropropyl)trimethoxysilane (2530-87-2)

Safety information for 3-Chloropropyltrimethoxysilane

Signal word	Warning
Pictogram(s)	Exclamation Mark Irritant GHS07
GHS Hazard Statements	H227:Flammable liquids H313:Acute toxicity,dermal H315:Skin corrosion/irritation H319:Serious eye damage/eye irritation H335:Specific target organ toxicity, single exposure;Respiratory tract irritation
Precautionary Statement Codes	P305+P351+P338:IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.