Pharm-Trol count controls contain NIST traceable
size standards with a measured particle count. It
was developed for manufacturers of parenteral
drugs and ophthalmic solutions seeking interim verification of USP <788> and <789> (Particulate Matter in Injections and Particulate Matter in Ophthalmic Solutions).
These count controls are prepared with the same exacting procedures as the USP Count Reference Standard and provide process control data for particle counting consistency and verification of size calibration.