Boron trichloride methyl sulfide complex
Boron trichloride methyl sulfide complex (CAS: 5523-19-3), with the linear formula (CH3)2S·BCl3 and a molecular weight of 179.30 g/mol, is a valuable Lewis acid. Supplied by Tech Serve Solutions, this compound is recognised for its utility in chemical synthesis as a strong Lewis acid catalyst and reagent. It is typically provided as a solution in methylene chloride at a concentration of 2.0 M, with an assay of 99%.
- IUPAC
- Dimethyl sulfide-trichloroborane,Trichloroborane-methyl sulfide
- Synonyms
- Dimethyl sulfide-trichloroborane,Trichloroborane-methyl sulfide

Lewis Acid Catalysis
The Boron trichloride methyl sulfide complex serves as a potent Lewis acid catalyst in various organic transformations. Its strong electrophilic nature facilitates reactions such as Friedel-Crafts alkylations and acylations, polymerisation, and Diels-Alder reactions by activating substrates.
Chemical Synthesis Reagent
This complex is employed as a synthetic reagent in the preparation of diverse organic compounds. It can be used for the introduction of boron-containing moieties or as a dehydrating agent in specific synthetic pathways. Its complexed form offers easier handling compared to the parent boron trichloride.
Precursor for Boron Compounds
Boron trichloride methyl sulfide complex can act as a precursor for the synthesis of other organoboron compounds. These derivatives find applications in materials science, pharmaceuticals, and advanced chemical research.
| Molecular weight | 179.30 |
|---|---|
| Linear formula | (CH3)2S · BCl3 |
| Assay | 99% |
| Density | 1.344 g/mL at 25 °C |
| Concentration | 2.0 M in methylene chloride |
| Melting point | 88-90 °C(lit.) |

Hazard statements
- H314Causes severe skin burns and eye damage
Precautionary statements
- P280Wear protective gloves, clothing and eye/face protection
- P305IF IN EYES
- P310Immediately call a POISON CENTER or doctor
| Protective equipment | Eyeshields, Faceshields, full-face particle respirator type N100 (US), Gloves, respirator cartridge type N100 (US), type P1 (EN143) respirator filter, type P3 (EN 143) respirator cartridges |
|---|---|
| Transport (UN / ADR) | UN 3261 8 / PGII |
| Water hazard class (WGK, DE) | 3 |
| Hazard codes (EU) | C |
| Risk statements (R) | 34 |
| Safety statements (S) | 26-27-28-36/37/39-45 |
Hazard information is provided for guidance. Always consult the product Safety Data Sheet (SDS), available on request, before handling.
Documentation
Every batch ships with a Certificate of Analysis covering assay, identity and purity; the grade is confirmed against your enquiry. Safety Data Sheets and technical data sheets are available on request.
Supply & logistics
Samples for technical evaluation; bulk MOQ by grade and packaging. In-stock material ships in 7–10 working days, worldwide, with full export documentation.
What is Boron trichloride methyl sulfide complex used for?
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Boron trichloride methyl sulfide complex (CAS 5523-19-3) is primarily used as a Lewis acid catalyst and a reagent in chemical synthesis. It facilitates various organic transformations and can serve as a precursor for other boron compounds.
What are the CAS number and formula for Boron trichloride methyl sulfide complex?
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The CAS number for Boron trichloride methyl sulfide complex is 5523-19-3, and its linear formula is (CH3)2S·BCl3.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies Boron trichloride methyl sulfide complex with an assay of 99%. It is provided as a 2.0 M solution in methylene chloride. This product is intended for research and industrial applications; it is not supplied as USP, BP, or EP grade.
What are the primary safety hazards associated with Boron trichloride methyl sulfide complex?
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This compound is classified as corrosive (H314), causing severe skin burns and eye damage. It requires stringent handling procedures, including the use of appropriate personal protective equipment such as chemical-resistant gloves, eye protection (goggles and face shield), and respiratory protection. Always consult the Safety Data Sheet (SDS) before use.
How is Boron trichloride methyl sulfide complex packed and shipped?
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Boron trichloride methyl sulfide complex is packed and shipped in compliance with relevant regulations for hazardous materials, identified under UN 3261, Class 8, Packing Group II. TSS ensures that all export shipments meet international shipping standards.
How can I request a quote or sample for Boron trichloride methyl sulfide complex?
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To request a quote or a sample of Boron trichloride methyl sulfide complex, please contact the Tech Serve Solutions sales team through our website or by phone. Our representatives will be pleased to assist you with your requirements.
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