Qingdao Langyatai (Group) Co., Ltd. is the largest factory of itaconic acid and its derivatives itaconic anhydride,dimethyl itaconate in China. Being an ISO9001 and ISO14001 Certificated company, we utilize advanced technology and refined process, and actualize strict quality control during the production. We also produce glycine, kojic acid, gluconic acid, xanthic gum, L-(+)tartaric acid, D-ribose, mannitol, sodium alginate, etc. For detailed technical info please contact me without hesitation.