Product Name

  • Name

    Chloromethyltrimethoxysilane

  • EINECS
  • CAS No. 5926-26-1
  • Article Data12
  • CAS DataBase
  • Density 1.132 g/mL at 25 °C(lit.)
  • Solubility
  • Melting Point
  • Formula C4H11 Cl O3 Si
  • Boiling Point 151 °C(lit.)
  • Molecular Weight 170.668
  • Flash Point 26 °F
  • Transport Information
  • Appearance Clear transparent liquid
  • Safety Moderately toxic by ingestion. Mildly toxic by inhalation. A skin and severe eye irritant. When heated to decomposition it emits toxic fumes of Cl.
  • Risk Codes 11
  • Molecular Structure Molecular Structure of 5926-26-1 (Chloromethyltrimethoxysilane)
  • Hazard Symbols F
  • Synonyms (Chloromethyl)trimethoxysilane;Chloro(trimethoxysilyl)methane; Trimethoxy(chloromethyl)silane
  • PSA 27.69000
  • LogP 1.06080

Chloromethyltrimethoxysilane Chemical Properties

Chemistry informtion about Chloromethyl Trimethoxysilane (CAS NO.5926-26-1) is:
IUPAC Name: Chloromethyl(trimethoxy)silane
Synonyms: (Trimethoxychloromethyl)Silane ; Chloromethyl-Trimethoxy-Silan ; Chloromethyltrimethoxysilane ; Nd-40 ; (Trimethoxysilyl)Chloromethane
MF: C4H11ClO3Si
MW: 170.67  
Density: 1.061 g/cm3
Flash Point: 30.1 °C
Boiling Point: 132.2 °C at 760 mmHg
Enthalpy of Vaporization: 35.45 kJ/mol
Vapour Pressure: 11 mmHg at 25°C 
Refractive Index: 1.407 [25°C]
Product Categories: Alkoxy Silanes ; Alpha Silanes ; Self Assembly&Contact Printing ; Self-Assembly Materials ; Silanes
Following is the molecular structure of Chloromethyl Trimethoxysilane (CAS NO.5926-26-1) is:

Chloromethyltrimethoxysilane Toxicity Data With Reference

Organism Test Type Route Reported Dose (Normalized Dose) Effect Source
rat LC50 inhalation 3600ppm/4H (3600ppm)   "Prehled Prumyslove Toxikologie; Organicke Latky," Marhold, J., Prague, Czechoslovakia, Avicenum, 1986Vol. -, Pg. 1222, 1986.
rat LD50 oral 500mg/kg (500mg/kg)   "Prehled Prumyslove Toxikologie; Organicke Latky," Marhold, J., Prague, Czechoslovakia, Avicenum, 1986Vol. -, Pg. 1222, 1986.

Chloromethyltrimethoxysilane Safety Profile

Moderately toxic by ingestion. Mildly toxic by inhalation. A skin and severe eye irritant. When heated to decomposition it emits toxic fumes of Cl.
Hazard Codes:
 FlammableF
Risk Statements:
R11:Highly flammable.
Safety Statements:
S16:Keep away from sources of ignition. 
S29:Do not empty into drains. 
S33:Take precautionary measures against static discharges.
RIDADR UN: 1993 3/PG 2
WGK Germany: 3
TSCA: No

Chloromethyltrimethoxysilane Specification

Chloromethyl Trimethoxysilane (CAS NO.5926-26-1) is a clear transparent liquid.
First Aid Measures:
Ingestion: Seek medical assistance.
Inhalation: Move victim to fresh air. Apply artificial respiration if victim is not breathing. Do not use mouth-to-mouth method if victim ingested or inhaled the substance; induce artificial respiration with the aid of a pocket mask equipped with a one-way valve or other proper respiratory medical device. Administer oxygen if breathing is difficult.
Skin: Remove and isolate contaminated clothing and shoes. Immediately flush with running water for at least 20 minutes. For minor skin contact, avoid spreading material on unaffected skin.
Eyes: Immediately flush with running water for at least 20 minutes.
Handling and Storage:
Storage: Keep in a cool, dry, dark location in a tightly sealed container or cylinder. Keep away from incompatible materials, ignition sources and untrained individuals. Secure and label area. Protect containers/cylinders from physical damage.
Handling: All chemicals should be considered hazardous. Avoid direct physical contact. Use appropriate, approved safety equipment. Untrained individuals should not handle this chemical or its container. Handling should occur in a chemical fume hood.

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