U.S. Code of Federal Regulations

Regulations most recently checked for updates: Aug 27, 2025

All TitlesTitle 21Chapter IPart 864Subpart B - Subpart B—Biological Stains
§ 864.1850 - Dye and chemical solution stains.
§ 864.1860 - Immunohistochemistry reagents and kits.
§ 864.1865 - Cervical intraepithelial neoplasia (CIN) test system.
§ 864.1866 - Lynch syndrome test systems.
§ 864.1870 - Early growth response 1 (EGR1) gene fluorescence in-situ hybridization (FISH) test system for specimen characterization.
§ 864.1880 - Fluorescence in situ hybridization (FISH)-based detection of chromosomal abnormalities from patients with hematologic malignancies.
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