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Water Testing

Water testing is comprised from multiple tests that are intended to assess the quality of water used for pharmaceutical purposes. Water is widely used as a raw material, inactive ingredient, medicinal vehicle, and solvent in the processing, formulation, and manufacture of pharmaceutical products (dosage forms), active pharmaceutical ingredients (APIs), API intermediates, compendial articles, and analytical reagents, as well as cleaning applications.

Nelson Labs performs multiple water testing such as Total Organic Carbon (TOC), Conductivity, pH and Particulates in compliance to USP <1231>, Water for Pharmaceutical Purposes.

Applicable Standards

  • USP <643>
  • USP <645>
  • USP <788>
  • USP <791>

Testing Locations


If you have additional questions about Excipient Testing, or would like to consult with the experts at Nelson Labs, just send us a request or call our Fairfield, NJ facility  at +1 (973) 227-6882.