3-Chloro-2-methylphenyl isocyanate
3-Chloro-2-methylphenyl isocyanate (CAS: 40397-90-8, Formula: ClC6H3(CH3)NCO) is an organic compound with a molecular weight of 167.59. It serves as a valuable building block in organic synthesis, particularly for the introduction of the 3-chloro-2-methylphenylcarbamoyl moiety into various molecules. Its reactive isocyanate group makes it suitable for derivatisation and the synthesis of complex organic structures.

Organic Synthesis Intermediate
Utilised as a key intermediate in the synthesis of diverse organic compounds. The isocyanate functionality readily reacts with nucleophiles such as alcohols, amines, and thiols to form carbamates, ureas, and thiocarbamates, respectively.
Pharmaceutical Research
Employed in the development of novel pharmaceutical agents. Its structure can be incorporated into potential drug candidates, contributing to the exploration of new therapeutic avenues.
Agrochemical Development
Acts as a precursor in the synthesis of certain agrochemicals. The specific structural features can be leveraged for the creation of new crop protection agents.
| Molecular weight | 167.59 |
|---|---|
| Linear formula | ClC6H3(CH3)NCO |
| Assay | 98% |
| Boiling point | 95 °C/9 mmHg(lit.) |
| Density | 1.247 g/mL at 25 °C(lit.) |
| Refractive index | n20/D 1.56(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 | Eyeshields, Faceshields, full-face respirator (US), Gloves, multi-purpose combination respirator cartridge (US), type ABEK (EN14387) respirator filter |
|---|---|
| Flash point | 110 °C / 230 °F |
| Transport (UN / ADR) | UN 2206 6.1/PG 3 |
| 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 3-Chloro-2-methylphenyl isocyanate used for?
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3-Chloro-2-methylphenyl isocyanate (CAS: 40397-90-8) is primarily used as a building block in organic synthesis, particularly for pharmaceutical and agrochemical research and development.
What is the CAS number and molecular formula for 3-Chloro-2-methylphenyl isocyanate?
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The CAS number is 40397-90-8, and the molecular formula is ClC6H3(CH3)NCO.
What grade and purity does Tech Serve Solutions supply for 3-Chloro-2-methylphenyl isocyanate?
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Tech Serve Solutions supplies 3-Chloro-2-methylphenyl isocyanate with an assay of 98%. We do not represent this product as USP, BP, EP, or any other pharmacopoeia grade.
How should 3-Chloro-2-methylphenyl isocyanate be handled safely?
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This compound is harmful if swallowed, in contact with skin, or if inhaled, and causes skin and serious eye irritation and respiratory irritation. Appropriate personal protective equipment, including eyeshields, face shields, gloves, and a suitable respirator, must be used. Handle only in a well-ventilated area or under a fume hood.
How is 3-Chloro-2-methylphenyl isocyanate packed and exported?
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3-Chloro-2-methylphenyl isocyanate is packed according to safety regulations for hazardous materials, and Tech Serve Solutions has extensive experience in exporting chemicals globally.
How can I request a quote or sample of 3-Chloro-2-methylphenyl isocyanate?
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To request a quote or sample, please contact our sales team through the website or by phone, providing your specific requirements and shipping details.
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