- ▸ Isocyanate intermediate for substituted-urea herbicides such as diuron and linuron (Agriculture)
- ▸ Building block for pharmaceutical urea derivatives and specialty chemicals (Pharmaceuticals, Industrial Manufacturing)
A grade-specific Safety Data Sheet (SDS) — with the complete hazard classification, handling precautions, and transport information — is supplied with every shipment and available on request. Confirm all safety and regulatory details against the SDS for your specific grade.
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3,4-Dichlorophenyl Isocyanate is a aromatic isocyanate synthesis intermediate — a building block used in the manufacture of substituted ureas and carbamates and agrochemical intermediates (e.g. phenylurea chemistry). Identity: CAS 102-36-3.
What it is
3,4-Dichlorophenyl Isocyanate (CAS 102-36-3, C7H3Cl2NO) is a aromatic isocyanate sold as a synthesis intermediate — a defined building block that downstream manufacturers convert into finished products. Isocyanates are moisture-sensitive and require careful handling per the SDS.
Role in synthesis
The isocyanate group reacts with amines and alcohols to form ureas and carbamates, while the ring chlorines are further handles. The substitution pattern (isomer) is part of the identity — confirm the CAS to be sure the isomer matches your route, because position isomers react differently and lead to different products.
What it is used to make
It is a building block toward substituted ureas and carbamates and agrochemical intermediates (e.g. phenylurea chemistry). RawSource supplies the intermediate; the downstream synthesis, product registration and any application or efficacy are the responsibility of the manufacturer that uses it.
Forms, grades and handling
Supplied to a defined assay with a Certificate of Analysis (CoA) per lot; define the assay and key impurity limits your route needs. Several halo-aromatic intermediates are hazardous and some are regulated — confirm regulatory status and handling for your jurisdiction, and always consult the current Safety Data Sheet (SDS). Typical values are not a guaranteed specification; the CoA governs.
Bulk and custom-quantity supply
RawSource sources 3,4-Dichlorophenyl Isocyanate direct from producers in bulk and custom quantities, with CoA, TDS and SDS per lot. Tell us the assay and impurity limits and your sample/pilot/production quantity, and we will quote it and confirm supply continuity. See the full range in the intermediates guide.
Typical Properties
Typical reference values, not a specification; the Certificate of Analysis (CoA) for the lot governs.
| Property | Typical Value |
|---|---|
| Type | Aromatic isocyanate |
| End-use class | Urea/carbamate & agrochemical intermediates |
| CAS Number | 102-36-3 |
| Molecular Formula | C7H3Cl2NO |
| Molecular Weight | 188.01 g/mol |
| Handling | Refer to the current SDS |
Regulatory & registration requirements
- TSCA (US):
- REACH (EU):
- EC number: 203-026-2
Source: EPA TSCA Inventory (July 2025 release) · ECHA CHEM — retrieved 2026-07-12
Frequently Asked Questions
What is 3,4-dichlorophenyl isocyanate used for?
3,4-Dichlorophenyl isocyanate (CAS 102-36-3) is an aromatic isocyanate intermediate used to make substituted ureas and carbamates and phenylurea-type agrochemical building blocks.
Can RawSource supply 3,4-dichlorophenyl isocyanate in bulk or custom quantities?
Yes — RawSource supplies 3,4-dichlorophenyl isocyanate in bulk and custom (sample/pilot/production) quantities with CoA, TDS and SDS per lot. Tell us the assay, impurity limits and quantity, and we will quote it and confirm supply.
What is the REACH and TSCA regulatory status of 3,4-Dichlorophenyl Isocyanate?
3,4-Dichlorophenyl Isocyanate (CAS 102-36-3) is subject to U.S. TSCA Inventory requirements; supplying it into the EU requires valid REACH registration ((EC) No 1907/2006). RawSource cannot verify a third-party supplier's registrations — buyers should require documented TSCA and REACH compliance for their jurisdiction and volume (EC 203-026-2).