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Tetramethyl orthosilicate

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Origin: China

Cas No: 681-84-5

Specification: 99%min

Min order Quantity: 1 /kg

Supply Ability: 80 mt/month

Lead time: 7 days for OEM, 3 days for ready goods

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  • Products Specification
  • Product Description

  • Quick Details

    CAS No.:
    681-84-5
    Other Names:
    Methyl silicate
    MF:
    C4H12O4Si
    EINECS No.:
    681-84-5
    Place of Origin:
    Shandong, China
    Type:
    Agrochemical Intermediates, Dyestuff Intermediates, Flavor & Fragrance Intermediates, Pharmaceutical Intermediates, Syntheses Material Intermediates
    Brand Name:
    FinerChem
    Model Number:
    681-84-5
    Application:
    Organic Intermediate
    Appearance:
    Colorless transparent liquid.
    Product Name:
    Tetramethyl orthosilicate
    CAS:
    681-84-5
    Density:
    1.023

    Packaging&Delivery

    Packaging Details
    Fluorinated bottle for 1kg, 25kg/drum,200L Iron drum or as your special request
    Port
    SHANGHAI, QINGDAO , BEIJING, SHENZHEN , DALIAN
    Lead Time:
    Quantity(Kilograms)1 - 500>500
    Est. Time(days)4To be negotiated

    Products Description

    Product Name
    Tetramethyl orthosilicate
    CAS No.
    681-84-5
    Appearance
    Colorless transparent liquid.
    Assay
    ≥99%
    Capacity
    1000mt/year
    Min.packing
    1gram
    Application
    It is most commonly used as a raw material for sol-gel.
    Standard
    Export 
    Brand
    Finerchem 


    More information

    Molecular Formula: C4H12O4Si 
    Molecular Weight: 152.22 
    CAS Registry Number: 681-84-5 
    EINECS: 211-656-4 
    Density: 1.023 
    Melting point: -2 ºC 
    Boiling point: 121-122 ºC 
    Flash point: 26 ºC 
    Water solubility: hydrolysis

  • Property

    CAS No.: 681-84-5 Formula: C4H12O4Si Molecular Weight: 152.22100

    Description

    Tetramethyl orthosilicate is the chemical compound with the formula Si(OCH3)4. This molecule consists of four methyl groups attached to the hypothetical anion SiO44−. The basic properties are similar to the more popular tetraethyl orthosilicate, which is usually preferred because the product of hydrolysis, ethanol, is less toxic than methanol.
    Tetramethyl orthosilicate hydrolyzes to SiO2:
    Si(OCH3)4 + 2 H2O → SiO2 + 4 CH3OH
    In organic synthesis, Si(OCH3)4 has been used to convert ketones and aldehydes to the corresponding ketals and acetals, respectively.

    Basic Info

    Chemical Name Tetramethyl orthosilicate
    Synonyms

    Silicic acid (H4SiO4), tetramethyl ester;
    tetramethoxy-silane;
    tl190;
    tetramethoxy-silan;
    methyl orthosilicate;
    METHYLSILICATE;
    Tetramethosysilan;
    tetramethyl silicate;
    SILICATE,METHYL;
    O-METHYLSILICATE;
    TMOS;
    orthosilicic acid tetramethyl ester;
    silicon tetramethoxide;
    Dynasil M;

    CAS No. 681-84-5
    Molecular Formula C4H12O4Si
    Molecular Weight 152.22100
    PSA 36.92000
    LogP 0.00760

    Properties

    Appearance & Physical State colourless liquid
    Density 1.023
    Boiling Point 121-122ºC
    Melting Point -2ºC
    Flash Point 26ºC
    Refractive Index 1.367-1.37
    Water Solubility hydrolysis
    Storage Condition Flammables area
    Vapor Density 5.25 (vs air)
    Vapor Pressure 3.35 psi ( 20 °C)

    Safety Info

    RTECS VV9800000
    Hazard Class 6.1
    Safety Statements S16-S26-S28-S36/37/39-S45
    HS Code 29209085
    WGK Germany 3
    Packing Group I
    RIDADR UN 2606 6.1/PG 1
    Risk Statements R10; R26; R37/38; R41
    Hazard Codes T+
    Symbol GHS02, GHS05, GHS06
    Hazard Declaration H226; H315; H318; H330
    Caution Statement P210; P260; P280; P304 + P340 + P310; P305 + P351 + P338 + P310; P370 + P378
    Signal Word Danger

    Synthesis Route

    (dimethoxymethyl)trimethoxysilane→Tetramethyl orthosilicate+Trimethoxy(methoxymethyl)silane
    Methanol+ethene→Trimethoxysilane+Tetramethyl orthosilicate
    Trimethoxysilane+ethene→Tetramethyl orthosilicate+Ethyltrimethoxysilane

    Toxicity

    Exposure Route Type of Test Species Observed Dose/Duration Toxic Effects
    Oral LDLo - Lowest published lethal dose Rodent - rat 700 mg/kg 1.Kidney, Ureter, Bladder-changes in tubules (including acute renal failure, acute tubular necrosis)
    Inhalation LCLo - Lowest published lethal concentration Rodent - rat 250 ppm/4H 1.Details of toxic effects not reported other than lethal dose value
    Intraperitoneal LD50 - Lethal dose, 50 percent kill Rodent - rat 100 mg/kg 1.Details of toxic effects not reported other than lethal dose value

    Precursor

    Allyl chloride
    silicon atom
    Trimethoxysilane
    Methanol

    Downstream Product

    2-(TRIFLUOROMETHYL)ANISOLE
    Tetrabutyl orthosilicate
    N-HEXYLTRIMETHOXYSILANE
    Trimethoxy(3,3,3-trifluoropropyl)silane

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