USP 841 Relative Density lab controls Quality control personnel must ensure

Quality control personnel must ensure that your manufacturing

This applies to physical

the lot and any other implicated lots must be quarantined and an out of specification (OOS) investigation conducted to determine the validity of the result

You must control the issuance and use of packaging and labels and reconciliation of any issuance and use discrepancies

You must keep written records required by this part for 1 year past the shelf life date

USP 841 Relative Density lab controls Quality control personnel must ensureSOP for the measurement of density or specific gravity by Quality Control by weighing a sample in a glass or stainless steel Pycnometer of a known volume and comparing to purified water