Section 864.9225 - Cell-freezing apparatus and reagents for in vitro diagnostic use(a)Identification. Cell-freezing apparatus and reagents for in vitro diagnostic use are devices used to freeze human red blood cells for in vitro diagnostic use.(b)Classification. Class I (general controls). The device is exempt from the premarket notification procedures in subpart E of part 807 of this chapter subject to § 864.9 .45 FR 60643, Sept. 12, 1980, as amended at 65 FR 2310 , Jan. 14, 2000