从China供应商批量进口3, 4-Dichlorophenyl Isocyanate

3,4-dichlorophenyl isocyanate (C7H3Cl2NO, molecular weight 188.01 g/mol) is a reactive aromatic isocyanate where the isocyanate functionality (-NCO) is para to one chlorine and meta to the other on the phenyl ring. The material offered by Puyang Hongda Shengdao New Materials Co., Ltd. from their facility in Puyang, Henan Province, serves as a specialised reagent for urethane chemistry and heterocycle formation where the electron-withdrawing dichloro substitution pattern modulates reactivity. This compound is moisture-sensitive and undergoes rapid hydrolysis in the presence of atmospheric humidity to yield the corresponding urea and carbon dioxide, necessitating stringent handling under anhydrous conditions throughout the supply chain from manufacture to end-use.

The manufacturing route for this isocyanate typically proceeds via phosgenation of 3,4-dichloroaniline or through thermal decomposition of the corresponding carbamoyl chloride, with product purification by fractional distillation under reduced pressure due to thermal sensitivity. Standard commercial material is characterised by isocyanate content, typically expressed as percentage NCO by weight, with theoretical value 22.34% for the pure compound. Hydrolysable chlorine content serves as a critical quality indicator, as residual acid chloride or phosgene-derived impurities compromise stability and reactivity in downstream polymerisation. The dichloro substitution pattern confers reduced reactivity compared to unsubstituted phenyl isocyanate, affecting catalyst selection and reaction temperature profiles in urethane formation.

Primary applications centre on specialty polyurethane synthesis where the aromatic dichloro structure imparts specific mechanical or thermal properties, and as an intermediate for carbamate and urea agrochemicals including certain herbicide classes. The pharmaceutical sector employs this isocyanate in the synthesis of bioactive heterocycles through cycloaddition and nucleophilic addition pathways. Packaging for international shipment typically employs nitrogen-blanketed stainless steel drums or specialised composite containers with desiccant systems, given the material's reactivity with water. Trade from Henan Province utilises inland logistics to coastal ports (Qingdao or Lianyungang most commonly) with full dangerous goods documentation under isocyanate transport classifications. Buyers should confirm container integrity seals and nitrogen pressure gauges upon receipt.

Puyang Hongda Shengdao New Materials Co., Ltd. maintains its registered address at No.29 East Zhongyuan Road, Puyang, Henan Province, China (postal code 457001). The supplier holds imported-tier classification with harbour-level trust verification within the marketplace framework. Available interaction metrics indicate no response history, with zero percent response rate and zero hours average response time recorded. This profile characteristic requires buyers to implement proactive verification strategies, including direct telephone or video conference confirmation of operational status, before committing to commercial transactions or advance payment arrangements.

The company's product focus, as indicated by their listing, targets the fine and specialty chemical sector with isocyanate intermediates for industrial and pharmaceutical chemical manufacturing. No verified data exists regarding year of establishment, registered capital, production scale, employee numbers, or named clientele, and none should be inferred. Henan Province hosts significant chemical industry capacity, including coal-chemical derivatives and fine chemical intermediates, which may provide relevant supply chain context. Buyers should independently verify the supplier's hazardous chemicals production licence, environmental impact assessment approvals, and any claimed quality system registrations through direct documentation request and, where possible, third-party audit.