应该就是2,2-Diphenyl-1-picrylhydrazyl (free radical),
CAS 1898-66-4
如果做化学用的少,考虑我楼上说的250mg的
如果用1g左右或以上,用sigma的价格更合理。
MERCK有生物专用的DHHP,以50mg为一包装,单个看价格还成,如果用的多,价格就上去了。
merck的DHHP的资料:A cell-permeable, stable free radical that acts as a hydrogen radical scavenger. Useful in inducing free-radical injury to tissues and as a screening tool for detecting free radical scavenging activity of antioxidants. Absorption max: ~517 nm。