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     our company is specialized in producing tryptophan product line. It owns powerful technology force, independent development ability of new products, and can provide high-quality products and perfect technical service for every client. The main products include: L-tryptophan, D-tryptophan, DL-tryptophan , N-Acetyl-DL-tryptophan, Especially, L-tryptophan and D-tryptophan are the leading products. Based on the mutual benefit and common interest, we warmly welcome all friends from home and abroad to visit, negotiate and cooperate with us for mutual better development. “Providing the best products ” is our tenet, we will always strive for it.
    Rongtai company sincerely hopes to cooperate with all friends for mutual better development!