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    HomeProductsBasic & Fine ChemicalsFine ChemicalsTrimethylchlorosilane CAS 75‑77‑4
    • Trimethylchlorosilane CAS 75‑77‑4
    • Trimethylchlorosilane CAS 75‑77‑4

    Trimethylchlorosilane CAS 75‑77‑4

    Trimethylchlorosilane is a low‑molecular‑weight organosilicon compound commonly referred to as TMCS or chlorotrimethylsilane within industrial chemistry contexts. Identified by CAS 75‑77‑4, it contains a reactive silicon–chlorine bond that enables controlled silylation reactions, particularly for modifying hydroxyl‑containing substrates under anhydrous conditions. This property supports its typical application in silylation reagent preparation, where it is used as a defined reaction input in chemical synthesis and intermediate processing systems.
    For industrial supply, this material is available with competitive factory pricing, supports customized specifications, and is accompanied by MSDS, TDS, COA documentation, with availability for bulk supply.

    • CAS: 75-77-4
    • Synonyms: Trimethylchlorosilane, Chlorotrimethylsilane, TMCS, Trimethylsilyl chloride
    • Einecs: 200-900-5
    • Molecular Formula: C3H9ClSi
    • Grade: Industrial grade 99%
    • Package: 200kg iron drum or 50kg plastic drum packaging
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    Product Description

    Trimethyl chlorosilane, is an organic substance with the chemical formula C3H9ClSi is a colorless transparent liquid with a pungent odor, mainly used as an intermediate for silicone oil manufacturing, a hydrophobic agent, and an analytical reagent.

    Trimethylsilane chloride

    chemical formula：C3H9ClSi

    molecular weight：108.642 

    CAS login number：75-77-4 

    EINECS login number：200-900-5

    Melting point：-40 ℃ 

    Boiling point：57 ℃

    Density：0.854 g/cm³ (at 25°C)

    Appearance：Colorless transparent liquid

    Flash point：-18 ℃（OC）

    use：It is mainly used as an intermediate for silicone oil manufacturing, a hydrophobic agent, and an analytical reagent.

    Protective measures

    Respiratory protection: When you may be exposed to its vapors, you should wear a self-priming filter gas mask (full face mask). When emergency rescue or evacuation, it is recommended to wear a self-contained respirator.

    Eye protection: wear chemical safety protective glasses. Body protection: wear anti-poison penetration work clothes.

    Hand protection: wear rubber gloves.

    FAQ - Technical & Supply Chain

    • Q:

      Does CAS 75‑77‑4 specifically identify trimethylchlorosilane used as TMCS in industrial synthesis?

      A: Yes. CAS 75‑77‑4 is the standardized industrial and regulatory identifier for trimethylchlorosilane, commonly abbreviated as TMCS in chemical process documentation.
    • Q:

      Is trimethylchlorosilane typically applied as a finished formulation or as a reaction reagent?

      A: It is typically applied as a reaction reagent in silylation‑related processes, where it participates directly in chemical transformations rather than being used as a finished formulation component.
    Documents

    Documents and Product Support

    For product review and sourcing evaluation, supporting documents can be coordinated according to the product type, inquiry stage, and order requirements.

    • COA for batch-based quality reference
    • TDS for key physical and chemical information
    • SDS / MSDS for handling, storage, and safety reference
    • Packing information for sample, trial, and bulk orders
    • Technical communication based on application and specification requirements
    Quotation

    Information to Confirm Before Quotation

    Clear sourcing information helps reduce specification mismatch and allows a more accurate quotation before sample or bulk order discussion.

    • Product name and CAS number
    • Application or intended end use
    • Required purity, grade, or specification
    • Sample quantity, trial order, or bulk demand
    • Preferred packing form or net weight
    • Destination country or port
    • Required documents or compliance expectations
    Storage & Handling

    Packaging, Storage, and Handling Notes

    Packaging form, storage conditions, shelf life, and shipment arrangements should be confirmed according to the product characteristics, package size, and destination requirements.

    Before order confirmation, buyers are advised to review the corresponding product documents and confirm whether any special storage, labeling, or handling requirements apply.

    Supply Support

    Sample, Bulk Order and Repeat Supply Support

    Support can be arranged for sample discussion, bulk supply planning, packaging confirmation, and routine sourcing communication based on the actual product and order requirements.

    For repeat-use formulations or long-term procurement plans, buyers may discuss specification consistency, packaging preferences, delivery expectations, and document coordination in advance.

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    Tags:

    Organosilicon Reagent Silicone Intermediate Silylation Reagent

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