21 CFR 864.4400 - Enzyme preparations.
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(a) Identification. Enzyme preparations are products that are used in the histopathology laboratory for the following purposes:
(1) To disaggregate tissues and cells already in established cultures for preparation into subsequent cultures (e.g., trypsin);
(2) To disaggregate fluid specimens for cytological examination (e.g., papain for gastric lavage or trypsin for sputum liquefaction);
(3) To aid in the selective staining of tissue specimens (e.g., diastase for glycogen determination).
(b) Classification. Class I (general controls). This device is exempt from the premarket notification procedures in subpart E of part 807 of this chapter subject to the limitations in § 864.9.
[45 FR 60592, Sept. 12, 1980, as amended at 54 FR 25045, June 12, 1989; 66 FR 38789, July 25, 2001]
Title 21 published on 2013-04-01
no entries appear in the Federal Register after this date.