5-Chloro-2-methoxyphenyl isocyanate
5-Chloro-2-methoxyphenyl isocyanate (CAS 55440-54-5), with the chemical formula ClC6H3(OCH3)NCO and a molecular weight of 183.59 g/mol, is a reactive organic compound. It serves as a valuable building block in chemical synthesis, particularly for introducing the isocyanate functional group into organic molecules. This compound is primarily utilised in research and development settings for the creation of novel chemical entities.

Organic Synthesis Intermediate
This isocyanate derivative functions as a key intermediate in the synthesis of more complex organic molecules. Its reactive nature allows for straightforward incorporation into various synthetic pathways.
Chemical Research and Development
Utilised by researchers for exploring new chemical reactions and developing novel compounds with potential applications in diverse fields of chemistry.
Building Block for Specialty Chemicals
Serves as a foundational component in the construction of specialty chemicals due to the presence of both a chlorine atom and a methoxy group on the phenyl ring, alongside the isocyanate functionality.
| Molecular weight | 183.59 |
|---|---|
| Linear formula | ClC6H3(OCH3)NCO |
| Assay | 98% |
| Melting point | 58-61 °C(lit.) |

Hazard statements
- H302Harmful if swallowed
- H312Harmful in contact with skin
- H315Causes skin irritation
- H319Causes serious eye irritation
- H332Harmful 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
| Protective equipment | dust mask type N95 (US), Eyeshields, Gloves |
|---|---|
| Transport (UN / ADR) | UN 3335 |
| Water hazard class (WGK, DE) | 3 |
| Hazard codes (EU) | Xn |
| Risk statements (R) | 20/21/22-36/37/38 |
| Safety statements (S) | 26-36 |
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-Chloro-2-methoxyphenyl isocyanate used for?
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5-Chloro-2-methoxyphenyl isocyanate is primarily used as a building block and intermediate in organic synthesis and chemical research and development.
What is the CAS number and chemical formula?
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The CAS number for 5-Chloro-2-methoxyphenyl isocyanate is 55440-54-5, and its chemical formula is ClC6H3(OCH3)NCO.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies 5-Chloro-2-methoxyphenyl isocyanate with an assay of 98%. This product is not represented as USP, BP, EP, or any other pharmacopoeia grade.
What are the safety and handling precautions for this chemical?
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This compound is a Warning substance (GHS07) that is harmful if swallowed, in contact with skin, or if inhaled, and causes skin and eye irritation, and may cause respiratory irritation. Appropriate personal protective equipment, including a dust mask type N95, eyeshields, and gloves, should be used. Handle in a well-ventilated area and avoid breathing dust.
How is 5-Chloro-2-methoxyphenyl isocyanate packed and shipped?
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Tech Serve Solutions exports chemicals globally, adhering to all necessary regulations for safe packing and transportation of chemical products.
How can I request a quote or sample?
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Please contact our sales team via the website or email to request a quote or a sample of 5-Chloro-2-methoxyphenyl isocyanate.
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