Manufacturing Process Of Ethyl N-(2-Chloroethyl)Carbamate With 98% Purity
- High-yield synthesis route using non-phosgene methodology achieves ≥98% industrial purity
- Bulk production leverages metal oxide catalysts (e.g., ZnO, MgO) under mild conditions (100–200°C, 0.1–2.0 MPa)
- NINGBO INNO PHARMCHEM CO.,LTD. supplies certified batches with full COA documentation for agrochemical intermediates
Ethyl N-(2-chloroethyl)carbamate (CAS 6329-26-6), also known as (2-chloroethyl)-urethan or ethyl 2-chloroethylcarbamate, is a critical building block in the synthesis of pharmaceuticals and agrochemical intermediates. Its structural motif—a chloroethyl group tethered to a carbamate ester—enables nucleophilic displacement reactions essential for constructing complex nitrogen-containing molecules. Industrial demand centers on consistent access to material with ≥98% purity, minimal residual solvents, and reproducible reaction yields suitable for multi-kilogram scale campaigns.
Optimized Non-Phosgene Synthesis Route
Traditional phosgene-based routes pose severe safety and environmental hazards due to the extreme toxicity and corrosivity of phosgene gas. Modern manufacturing avoids this by adopting a urea-alcohol condensation pathway catalyzed by solid metal oxides—a method validated in patents such as CN100349861C. In this approach, urea reacts with ethanol in the presence of a heterogeneous catalyst (e.g., zinc oxide, magnesium oxide, or calcium oxide) under controlled temperature (100–200°C) and pressure (0.1–2.0 MPa). The only gaseous byproduct is ammonia, which is efficiently captured via condensation and recycled, ensuring zero waste discharge.
The reaction proceeds as follows:
- Step 1: Urea and ethanol are charged into a sealed reactor at a molar ratio of 1:1 to 1:20.
- Step 2: A metal oxide catalyst (5–15 wt%) is added, and the mixture is heated with stirring.
- Step 3: Ammonia evolution begins at ~125°C; it is continuously absorbed using a water-cooled condenser and recovery loop.
- Step 4: After 1–12 hours of reaction time, the crude product is distilled under reduced pressure (100–120°C bath temperature) to isolate Ethyl N-(2-chloroethyl)carbamate.
This method delivers yields exceeding 95% with inherent scalability and operational safety—key advantages for B2B procurement in regulated industries.
Purification and Industrial Purity Assurance
To achieve the benchmark ≥98% purity required for downstream applications, vacuum distillation remains the gold standard for bulk purification. Unlike crystallization—which can suffer from solvent inclusion or polymorphic variability—fractional distillation under controlled vacuum effectively separates the target compound (boiling point ~130–135°C at 10 mmHg) from unreacted ethanol, urea derivatives, and high-boiling impurities.
Final product specifications typically include:
| Parameter | Specification |
|---|---|
| Assay (GC) | ≥98.0% |
| Water (KF) | ≤0.5% |
| Residual Solvents | Complies with ICH Q3C |
| Heavy Metals | ≤10 ppm |
| Appearance | Colorless to pale yellow liquid |
Every batch is accompanied by a Certificate of Analysis (COA) detailing chromatographic profiles, elemental composition, and compliance with international standards—ensuring traceability and regulatory readiness.
Commercial Advantages of Bulk Sourcing from NINGBO INNO PHARMCHEM CO.,LTD.
As a premier global manufacturer specializing in high-purity carbamate intermediates, NINGBO INNO PHARMCHEM CO.,LTD. integrates this advanced synthesis protocol into its GMP-aligned production infrastructure. The company offers multi-ton capacity with flexible packaging (drums, IBCs, ISO tanks) and rapid global logistics. When sourcing high-purity Ethyl N-(2-chloroethyl)carbamate, buyers benefit from vertically integrated quality control, competitive bulk pricing, and technical support for process adaptation.
Moreover, the company’s expertise extends to structurally related compounds such as (2-chloro-ethyl)-carbamic acid ethyl ester and custom carbamate derivatives, enabling end-to-end supply chain solutions for complex synthetic campaigns.
Conclusion
The manufacturing process of Ethyl N-(2-chloroethyl)carbamate with 98% purity hinges on a safe, scalable, and environmentally conscious non-phosgene route. By leveraging metal oxide-catalyzed condensation and precision distillation, producers like NINGBO INNO PHARMCHEM CO.,LTD. deliver consistent, high-integrity material that meets the stringent demands of modern agrochemical and pharmaceutical synthesis. For technical data sheets, bulk quotations, or sample requests, direct engagement with certified manufacturers ensures optimal performance in your downstream processes.