ph 1 and 2 are 16 and 1 6 mg ml up to 100 mg carbendazim can be given orally in 100 ml of the vehicle soft drink syrups with or without sweetening agents and other acidic solutions suitable for consumption by mammals can also be used as vehicles for oral formulations since an oral formulation is typically administered along with a fluid like water or juice it is essential to study the effect of dilution of the formulation with these fluids this can be investigated by a simple serial dilution precipitation study for example serial dilutions of the formulation with equal volumes of seven up water and ph 7 buffer 0 1 ml formulation was added to a test tube containing 1 10 or 25 ml each of soda solution seven up 0 01m ph 7 phosphate buffer solution or water the mixed solution was shaken by hand for 5 seconds the presence or absence of carbendazim crystal was determined visually and the final ph was recorded the visual determination of the carbendazim crystals was also performed at one day later after dilution table 1 shows the result of a precipitation study for two oral formulations 1 mg ml carbendazim buffered solution at ph 2 and 2 mg ml carbendazim in 5 buffered mc solution at ph 2 it is evident from table 1 that both above.