4-Chloromethyl-5-methyl-1,3-dioxol-2-one
4-Chloromethyl-5-methyl-1,3-dioxol-2-one (CAS: 80841-78-7) is a chemical compound with the molecular formula C5H5ClO3 and a molecular weight of 148.54 g/mol. This dioxolanone derivative functions as a valuable building block in organic synthesis. It is typically employed in chemical reactions requiring the introduction of specific functional groups. Tech Serve Solutions supplies this product for research and development purposes.
- Synonyms
- C5H5ClO3

Organic Synthesis Intermediate
4-Chloromethyl-5-methyl-1,3-dioxol-2-one serves as a key intermediate in the synthesis of more complex organic molecules. Its reactive chloromethyl group allows for various derivatization reactions.
Building Block for Fine Chemicals
This compound is utilised as a building block in the preparation of fine chemicals. The dioxolanone ring structure can be incorporated into target molecules, contributing to diverse chemical architectures.
Reagent in Chemical Research
It is used in laboratory settings for research and development, enabling chemists to explore new synthetic pathways and develop novel compounds.
| Molecular weight | 148.54 |
|---|---|
| Empirical formula | C5H5ClO3 |
| Assay | ≥96.5% (HPLC)97% |

Hazard statements
- H302Harmful if swallowed
- H315Causes skin irritation
- H319Causes serious eye irritation
- H335May cause respiratory irritation
Precautionary statements
- P261Avoid breathing dust, fume, gas or vapours
- P305IF IN EYES
| Protective equipment | Eyeshields, Faceshields, full-face respirator (US), Gloves, multi-purpose combination respirator cartridge (US), type ABEK (EN14387) respirator filter |
|---|---|
| Flash point | 129 °C / 264.2 °F |
| Water hazard class (WGK, DE) | 3 |
| Hazard codes (EU) | Xn |
| Risk statements (R) | 22-36/37/38 |
| Safety statements (S) | 26 |
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 4-Chloromethyl-5-methyl-1,3-dioxol-2-one used for?
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4-Chloromethyl-5-methyl-1,3-dioxol-2-one is primarily used as an intermediate and building block in organic synthesis and chemical research for the development of new compounds.
What is the CAS number and molecular formula for 4-Chloromethyl-5-methyl-1,3-dioxol-2-one?
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The CAS number is 80841-78-7, and its molecular formula is C5H5ClO3.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies 4-Chloromethyl-5-methyl-1,3-dioxol-2-one with a minimum assay of ≥96.5% by HPLC, or 97%. This product is supplied for technical and research purposes; TSS does not represent it as USP, BP, or EP grade.
What are the main safety hazards associated with 4-Chloromethyl-5-methyl-1,3-dioxol-2-one?
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This compound is classified with GHS07 signal word 'Warning'. It is harmful if swallowed (H302), causes skin irritation (H315), causes serious eye irritation (H319), and may cause respiratory irritation (H335). Appropriate personal protective equipment, including eyeshields, gloves, and respiratory protection, should be used.
How is 4-Chloromethyl-5-methyl-1,3-dioxol-2-one packed and shipped?
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Tech Serve Solutions exports chemicals globally, adhering to all relevant shipping regulations. Packaging is designed to ensure product integrity and safety during transit.
How can I request a sample or quote for 4-Chloromethyl-5-methyl-1,3-dioxol-2-one?
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To request a sample or a detailed quote, please contact our sales team through the website or by phone, providing your specific requirements and delivery details.
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