Allyl oxalyl chloride
Allyl oxalyl chloride (CAS: 74503-07-4, Formula: C5H5ClO3) is a halogenated organic compound with a molecular weight of 148.54 g/mol. This reactive acyl chloride and allyl ester serves as a versatile building block in organic synthesis. It is particularly useful for introducing the oxalyl chloride moiety and the allyl group into various molecular structures, facilitating the creation of complex organic molecules for research and development.
- IUPAC
- 2-Propen-1-yloxy chloroacetate,Allyl 2-chloro-2-oxoacetate,Chlorooxoacetic acid 2-propenyl ester

Organic Synthesis Intermediate
Allyl oxalyl chloride acts as a key intermediate in the synthesis of various organic compounds. Its bifunctional nature allows for diverse reaction pathways in the preparation of fine chemicals and pharmaceutical precursors.
Building Block for Complex Molecules
This compound is employed as a building block in multi-step syntheses. The presence of both the allyl group and the reactive oxalyl chloride functional group enables its incorporation into complex molecular frameworks.
Reagent in Acylation Reactions
It can be utilised as a reagent in acylation reactions, introducing the oxalyl group with an attached allyl moiety. This is valuable for modifying existing molecules or creating novel derivatives.
| Molecular weight | 148.54 |
|---|---|
| Empirical formula | C5H5ClO3 |
| Assay | 97% |
| Density | 1.213 g/mL at 25 °C |
| Refractive index | n20/D 1.443 |



Hazard statements
- H226Flammable liquid and vapour
- H302Harmful if swallowed
- 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
| Flash point | 56 °C / 132.8 °F |
|---|---|
| Transport (UN / ADR) | UN 2920 3(8) / PGII |
| Water hazard class (WGK, DE) | 3 |
| Hazard codes (EU) | C |
| Risk statements (R) | 22-34 |
| Safety statements (S) | 26-36/37/39-45 |
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 Allyl oxalyl chloride used for?
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Allyl oxalyl chloride is primarily used as an intermediate and building block in organic synthesis for creating complex organic molecules and in acylation reactions.
What is the CAS number and formula for Allyl oxalyl chloride?
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The CAS number for Allyl oxalyl chloride is 74503-07-4 and its empirical formula (Hill notation) is C5H5ClO3.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies Allyl oxalyl chloride with an assay of 97%. This product is a technical or research grade material and TSS does not represent it as USP, BP, EP, or any other pharmacopoeia grade.
What are the main safety hazards associated with Allyl oxalyl chloride?
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Allyl oxalyl chloride is classified as Danger, with hazards including flammability (H226), harmful if swallowed (H302), and causes severe skin burns and eye damage (H314). Appropriate personal protective equipment and handling procedures are essential.
How is Allyl oxalyl chloride packed and shipped?
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Allyl oxalyl chloride is shipped according to UN 2920 regulations for corrosive and flammable liquids, Group II. Specific packing and export procedures adhere to international transport safety standards.
How can I request a sample or quote for Allyl oxalyl chloride?
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To request a sample or obtain a quotation for Allyl oxalyl chloride, please contact the TSS sales department via the website's inquiry form or listed contact details.
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