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e-CFR data is current as of April 16, 2021

Title 21Chapter ISubchapter HPart 866Subpart E → §866.4800


Title 21: Food and Drugs
PART 866—IMMUNOLOGY AND MICROBIOLOGY DEVICES
Subpart E—Immunology Laboratory Equipment and Reagents


§866.4800   Radial immunodiffusion plate.

(a) Identification. A radial immunodiffusion plate for clinical use is a device that consists of a plastic plate to which agar gel containing antiserum is added. In radial immunodiffusion, antigens migrate through gel which originally contains specific antibodies. As the reagents come in contact with each other, they combine to form a precipitate that is trapped in the gel matrix and immobilized.

(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 the limitations in §866.9.

[47 FR 50823, Nov. 9, 1982, as amended at 66 FR 38792, July 25, 2001]

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