water the drying feed stocks used in the present invention are either emulsions or solutions which preferably do not contain any solid matter and in particular preferably do not contain any undissolved sartan it is particularly preferable that the level of the sartan in the composition should be such that the loading in the dried composition is below 40 wt and more preferably below 30 wt such compositions have the advantages of a small particle size and high effectiveness as discussed above on admixture of the water soluble carrier material with water the carrier dissolves and the water insoluble sartan is dispersed through the water in sufficiently fine form that it behaves like a soluble material in many respects the particle size of the water insoluble materials in the dry product is preferably such that on solution in water the water insoluble materials have a particle size of less than 1 micron as determined by the malvern method described herein it is believed that there is no significant reduction of particle size for the sartan on dispersion of the solid form in water by applying the present invention significant levels of u2018 water insoluble u2019 materials can be brought into a state which is largely equivalent to true solution when the dry product is dissolved in water it is possible to achieve optically clear solutions comprising more than 0 1 preferably more than 0 5 and.