How are food and potable grade resins different from industrial grade resins?

All industrial grade ion exchange resins and adsorbents have low levels of organic leachables, which are released from the resin when new. With the resins used in foodstuff and potable water production, the resin manufacturers take additional steps to reduce these to much lower levels, so that they cannot affect the product being produced by the resin detrimentally. In addition, the composition of food contact and potable water resins need to meet relevant requirements or regulations. Industrial resins may not meet these requirements.