sigma试剂现货 L5626-100g L-Lysine monohydrochloride 100g L-赖氨酸盐酸盐
sigma试剂现货 341436-25g Tetramethyl orthosilicate 25g 硅酸甲酯
sigma试剂现货 407410-10g Sodium sulfide 10g 硫化钠
sigma现货,p9560-1000ea Finnpipette® pipette tips
sigma现货,B6008-25g Ponceau BS - Dye content
sigma现货,A7413-25g Alloxan monohydrate