dear sirs, we have the pleasure to introduce ourselves to you with the hope that we may have an opportunity of cooperating with you in your business extension. as you may be aware,we are the qingdao langyatai co., ltd, is the largest producer of itaconic acid in china, with an annual output of 4500 tons. the company has the most advanced equipment and technology. both of the product quality and the quality system are certified by iso9002. based on the superior and consistent quality, our product has been exported to japan, the united states and european countries, and we have established business relations with basf and dow chemical. we also supply itaconic anhydride, dimethyl itaconate,l(+)-tartaric acid,l-threonine,kojic acid,phytic acid,coffeic acid, xanthan gum,ferulic acid,etc. itaconic acid or methylene succinic acid is an unsaturated diacid and the unsaturated double bonds have conjugate relations with carboxy, so it is active in chemical characters and has strong reaction ability, and is able to take self-polymerization, polymerize with monomers of different numbers. it becomes an unsubstantiated important intermediate product in the chemical synthetic industry, and can be widely used in macromolecular compound fields, is fine industrial materials in producing butadiene-styrene latex, synthetic resin, synthetic fiber, plastics, rubber, ion exchange resin, surface active agent, boiler cleaning agent, lubricating additive, binder, thickening agent, as well as special glass fiber reinforced plastic, special lens, contact lens, man-made gem and so on. please don't hesitate to contact us if you are interested in our products. we can offer you high-quality products and competitive price. thank you for your kindly attentions. helen song(ms.) qingdao langyatai (group)co.,ltd.