6 Background: The acceptance criteria of 0.5 mm for metal particles is also often applied at drug product
manufacturers for in-line metal detectors/metal separators.
7 Justification for very small particles: see Ref.h); for inert particles >0,2 mm, as they are not dissolved and not
absorbed in the gastrointestinal gut: see Ref.i)
8 Justification: limit is based on experience and practicality of this test to detect about 2 ppm charcoal on a filter
with about 25 to 50 mm diameter
9 Remark: It is recognized that particles might only be identified as metals by applying specific analytical
techniques