Common synergists used in flea sprays are piperonyl butoxide (PBO) and N -
octyl bicycloheptene dicarboximide (MGK 264).
Pyrethrins, Piperonyl buboxide, N -
Octyl bicycloheptene dicarboximide, Di - n - propyl isocinchomeronate
Active ingredients: (s)- methoprene 0.27 %, pyrethrins 0.2 %, piperonyl butoxide technical 0.37 %, n -
octyl bicycloheptene dicarboximide 0.62 %
Pyrethrins: 0.180 % 2 -[1 - Methyl - 2 -(4 - phenoxyphenoxy) exthoxypyridine: 0.125 % * N -
Octyl bicycloheptene dicarboximide: 0.957 % Other Ingredients: 98.738 % * MGK 264, Insecticide Synergist