StacksVerified U.S. regulatory reference

21 CFR §866.5510

Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov
  1. (a)Identification. An immunoglobulins A, G, M, D, and E immunological test system is a device that consists of the reagents used to measure by immunochemical techniques the immunoglobulins A, G, M, D, an E (serum antibodies) in serum. Measurement of these immunoglobulins aids in the diagnosis of abnormal protein metabolism and the body's lack of ability to resist infectious agents.
  2. (b)Classification. Class II (performance standards).