14-Butynediol is the major raw material of vitamin B6 as well as a brightening preserving agent and inhibitor for nickel plating 1,4-Butynediol(BYD) is mainly used to produce BDO and its downstream products, such as poly (butylene terephthalate)(PBT), polyurethane (adhesive and chain-extending agent), tetrahydrofuran, γ-butyrolactone, N-methyl pyrrolidone, polyvinyl pyrrolidone. Specification ...