(Chloromethylene)dimethyliminium chloride
(Chloromethylene)dimethyliminium chloride (CAS 3724-43-4) is a potent synthetic reagent with the molecular formula ClCH=N(CH3)2Cl. Its primary utility lies in chemical synthesis, particularly for C-C bond formation and as a versatile building block in organic chemistry. Available at 95% assay, this compound is supplied by Tech Serve Solutions for research and industrial applications, adhering to stringent quality control.
- IUPAC
- (Chlormethylene)dimethylammonium chloride,Arnold′s reagent,Dimethylchloroformiminium chloride,Vilsmeier reagent
- Synonyms
- (Chlormethylene)dimethylammonium chlorideArnold′s reagentDimethylchloroformiminium chlorideVilsmeier reagent

C-C Bond Formation
This reagent is instrumental in creating new carbon-carbon bonds, a fundamental process in organic synthesis. It enables the construction of complex molecular architectures from simpler precursors.
Organic Synthesis
Utilised as a key intermediate and reagent in various organic transformations. Its reactivity allows for diverse synthetic routes to target molecules.
Preparation of Heterocycles
It serves as a precursor in the synthesis of various heterocyclic compounds, which are important motifs in pharmaceuticals and agrochemicals.
| Molecular weight | 128.00 |
|---|---|
| Linear formula | ClCH=N(CH3)2Cl |
| Assay | 95% |
| Storage temperature | 2-8°C |
| Impurities tested | <5% DMF |
| Application | Reagent used to prepare |
| Melting point | 132 °C (dec.)(lit.) |



Hazard statements
- H302Harmful if swallowed
- H314Causes severe skin burns and eye damage
- H360D
Precautionary statements
- P201Obtain special instructions before use
- 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) | T |
| Risk statements (R) | 61-14-22-35 |
| Safety statements (S) | 53-26-36/37/39-45 |
| Supplemental hazards | Reacts violently with water. |
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 (Chloromethylene)dimethyliminium chloride primarily used for?
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This compound is primarily used as a reagent in organic synthesis, particularly for C-C bond formation and as a building block for creating complex molecules and heterocycles.
What are the CAS number and formula for (Chloromethylene)dimethyliminium chloride?
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The CAS number is 3724-43-4 and the linear formula is ClCH=N(CH3)2Cl.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies (Chloromethylene)dimethyliminium chloride with an assay of 95%. We do not represent this product as USP, BP, EP, or other pharmacopoeia grades unless explicitly stated.
How should (Chloromethylene)dimethyliminium chloride be handled safely?
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Danger: This compound is corrosive and may cause severe skin burns and eye damage (H314). It is harmful if swallowed (H302) and may damage fertility or the unborn child (H360D). It reacts violently with water. Appropriate personal protective equipment, including eyeshields, gloves, and respiratory protection, is essential. Handle in a well-ventilated area, away from moisture. Refer to the Safety Data Sheet for comprehensive handling instructions.
How is this product shipped and exported?
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This chemical is classified under UN 3261, Packing Group II, for transport. Tech Serve Solutions is experienced in exporting fine chemicals globally, ensuring compliance with all relevant shipping regulations.
How can I request a quote or sample?
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To request a quote or a sample, please visit the product page on our website and use the designated 'Request a Quote' or 'Request Sample' buttons, or contact our sales team directly.
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