Qingdao Huaan International Trading Co., Ltd is the subsidiary company of Guangrao Yongzheng Auto Parts Co., Ltd. The company established in 1998, with 14years of production experience, advanced equipment and strong supply capacity.Now the factory has developed more than 200products of tubeless wheel and tube wheel for heavy-duty truck. In 2010, we have our own tube rim material factory Hengde New Materials Co., Ltd will gurantee best quality and competitive price. Now our production is not only sold in China but also exported to more than 50countries and regions in the world, gaining good reputation.Welcome friends from home and abroad striving for cooperation and mutual development.

pixelHeight">Soluble in water and a variety of organic solvents. PVP-K series also offer low toxicity, good film-forming capacity, good stability, physiollgical inertness and adhesive ability. Pharmaceutical grade PVP-K series(CP2005, USP28) Items K-30 K-90 K value 27-32 81-97 N-vinylpyrrolidone% ≤0.1 ≤0.1 Water% ≤5.0 ≤5.0 Residue on ignition% ≤0.1 ≤0.1 PH value(5%water solution) 3-7 3-7 N%(nitrogen) 11.5-12.8 11.5-12.8 Aldehyde as acetaldehyde% ≤0.05 ≤0.05 Heavy metal as pb.(PPM) ≤10 ≤10 Hydrazines(PPM)