the liquid citric acid (50%)-part 1 should be diluted with the same volume of wtaer, then neutralized under agitation by slowly adding the sodium hydroxide solution. (CAUTION: the reaction is highly exothermic.0 add remaining ingredients in order given. the liquid citric acid (50%)-part 2 should be added at end to bring the pH to 8.0-8.5. the clear solution should have a solids content of about 37%.