5-(Chloromethyl)isoxazole-4-carboxylic acid
5-(Chloromethyl)isoxazole-4-carboxylic acid (CAS: 870704-27-1) is a halogenated heterocyclic building block with a molecular weight of 161.54 g/mol. This compound is primarily utilised in chemical synthesis and research applications. Its structure makes it a valuable intermediate for the development of novel molecules, particularly within pharmaceutical and agrochemical research. It is supplied by Tech Serve Solutions with a purity of 97%.

Chemical Synthesis Intermediate
This isoxazole derivative serves as a key building block in complex organic synthesis. Its reactive chloromethyl group allows for versatile functionalization in the creation of diverse molecular scaffolds.
Pharmaceutical Research
The compound is employed in the discovery and development of new pharmaceutical agents. Its heterocyclic nature and functional groups are amenable to modifications for creating potential drug candidates.
Agrochemical Development
It can be utilised in the synthesis of new agrochemicals, contributing to the development of crop protection agents. Research into novel herbicides, fungicides, or insecticides may involve this intermediate.
Material Science Exploration
The unique structure may find application in the synthesis of novel materials with specific electronic or optical properties, though this is a less common use.
| Molecular weight | 161.54 |
|---|---|
| Empirical formula | C5H4ClNO3 |
| Assay | 97% |
| Melting point | 92-97 °C |


Hazard statements
- H315Causes skin irritation
- H317May cause an allergic skin reaction
- H319Causes serious eye irritation
- H334May cause allergy or asthma symptoms if inhaled
- H335May cause respiratory irritation
Precautionary statements
- P261Avoid breathing dust, fume, gas or vapours
- P280Wear protective gloves, clothing and eye/face protection
- P305IF IN EYES
- P342
| Protective equipment | dust mask type N95 (US), Eyeshields, Faceshields, Gloves |
|---|---|
| Water hazard class (WGK, DE) | 3 |
| Hazard codes (EU) | Xn |
| Risk statements (R) | 36/37/38-42/43 |
| Safety statements (S) | 26-36-45 |
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 5-(Chloromethyl)isoxazole-4-carboxylic acid used for?
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5-(Chloromethyl)isoxazole-4-carboxylic acid (CAS: 870704-27-1) is primarily used as a building block in chemical synthesis, particularly for pharmaceutical and agrochemical research and development.
What are the CAS number and molecular formula?
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The CAS number for 5-(Chloromethyl)isoxazole-4-carboxylic acid is 870704-27-1. The empirical formula is C5H4ClNO3, and its molecular weight is 161.54 g/mol.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies 5-(Chloromethyl)isoxazole-4-carboxylic acid with an assay of 97%. We do not represent this product as USP, BP, or EP grade; it is suitable for research and chemical synthesis purposes.
How should 5-(Chloromethyl)isoxazole-4-carboxylic acid be handled?
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This compound is classified with GHS07 and GHS08 symbols and carries a Danger signal word. It is a skin irritant (H315), a potential skin sensitiser (H317), an eye irritant (H319), and can cause allergy or asthma symptoms or breathing difficulties if inhaled (H334), and may cause respiratory irritation (H335). Appropriate personal protective equipment, including a dust mask type N95 (US), eyeshields, faceshields, and gloves, must be worn. Handle in a well-ventilated area.
How is this chemical packed and shipped?
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Tech Serve Solutions professionally packs and exports fine chemicals globally, adhering to all necessary regulations for safe and compliant transit.
How can I request a quote or sample?
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To request a quote or sample of 5-(Chloromethyl)isoxazole-4-carboxylic acid, please contact our sales team through the website or by phone.
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