... is a precursor to 1,4-butanediol. It is also used in the manufacture of plant protection agents, pesticides, textile additives, ... , and polyurethanes.[3] It is the major raw material of vitamin B6.[4] It is also used for brightening, preserving, and inhibiting ... nickel plating.[edit] Safety1,4-Butynediol is corrosive and irritates the skin and eyes.[3 ...