I want to use 0.75ppm MIT MCIT with 0.07% formalin in shampoo. This would equal to about 0.1% Lonzaserve PC. As this amount of MIT MCIT is too small i want to dilute the preservative that has 1.5% active with 19 parts water and 1 part preservative. This will give a solution of 750ppm MIT MCIT. I will then use this solution at 0.1% to get 0.75ppm MIT MCIT.
My question is: is it ok to dilute 1 part kathon cg with 19 parts water and store it in order to make it easier to use in small quantities?