Headquartered in Qingdao, a major foreign trade hub in northern China, Qingdao Yingya New Materials is a specialized supplier of fine chemical auxiliaries serving global clients. Our product portfolio covers full-range textile dyeing & finishing auxiliaries, leather processing chemicals, water treatment flocculants & decolorants, and functional monomers including Dimethyl Diallyl Ammonium Chloride (DMDAAC). We operate a strict, company-wide quality control system for all products: every export batch goes through rigorous index testing and compliance verification, with full international certifications including REACH, RoHS and ISO, ensuring minimal batch-to-batch variation and full traceability. Combining our in-house production capacity for customized, cost-effective solutions, and our integrated supply network across the Yangtze River Delta core chemical industrial cluster (including Shaoxing), we offer a complete product range to save clients the hassle of coordinating with multiple suppliers. Aligned with our “under-promise, over-deliver” principle, we arrange shipments from the nearest major port (Shanghai, Ningbo or Qingdao) based on factory location, ...