| ICG — Cresyl Violet Acetate | Class 1 / PA |
| ICH — Congo Red | Class 1 / PA |
| ICI — Hematoxylin, Chrome Alum | Class 1 / PA |
| ICJ — Carbol Night Blue | Class 1 / PA |
| ICL — Carbol Fuchsin | Class 1 / PA |
| ICM — Brilliant Yellow | Class 1 / PA |
| ICN — Biebrich Scarlet | Class 1 / PA |
| ICO — Best'S Carmine | Class 1 / PA |
| ICQ — Azure A | Class 1 / PA |
| ICR — Azocarmine B | Class 1 / PA |
| ICS — Azocarmine G | Class 1 / PA |
| ICT — Azan Counterstain | Class 1 / PA |
| ICX — Aniline | Class 1 / PA |
| ICY — Acid, Aniline, Fuchsin | Class 1 / PA |
| ICZ — Ammoniacal Silver Hydroxide Silver Nitrate | Class 1 / PA |
| IDA — Alcian Blue | Class 1 / PA |
| IDB — Aldehyde Fuchsin | Class 1 / PA |
| IDC — Acridine Orange | Class 1 / PA |
| IDD — Alizarin Red | Class 1 / PA |
| IDE — Acid, Hematein | Class 1 / PA |
| IDF — Acid, Fuchsin | Class 1 / PA |
| IDL — Microtome, Accessories | Class 1 / PA |
| IDM — Microtome, Ultra | Class 1 / PA |
| IDN — Microtome, Freezing Attachment | Class 1 / PA |
| IDO — Microtome, Rotary | Class 1 / PA |
| IDP — Microtome, Cryostat | Class 1 / PA |
| IDQ — Infiltrator | Class 1 / PA |
| IDR — Ovens, Paraffin | Class 1 / PA |
| IDS — Melting Pot, Paraffin | Class 1 / PA |
| IDT — Apparatus, Melting Point, Paraffin | Class 1 / PA |
| IDW — Dispensers, Paraffin | Class 1 / PA |
| IDX — Sieves, Tissue | Class 1 / PA |
| IDY — Bath, Flotation, Tissue | Class 1 / PA |
| IDZ — Cassettes, Tissue | Class 1 / PA |
| IEG — Table, Slide Warming | Class 1 / PA |
| IEH — Lamps, Slide Warming | Class 1 / PA |
| IEO — Processor, Tissue, Automated | Class 1 / PA |
| IER — Polyethylene Glycol (Carbowax) | Class 1 / PA |
| IEX — Gelatin | Class 1 / PA |
| IEZ — Celloidin | Class 1 / PA |
| IFB — Cytocentrifuge | Class 1 / PA |
| IFF — Solution, Decalcifier, Electrolytic | Class 1 / PA |
| IFH — Solution, Zenker'S | Class 1 / PA |
| IFI — Sprays, Synthetic, Smear | Class 1 / PA |
| IFJ — Fixative, Richardson Glycol | Class 1 / PA |
| IFL — Polyethylene Glycol Preservative | Class 1 / PA |
| IFN — Solution, Orth'S | Class 1 / PA |
| IFO — Solution, Newcomer'S | Class 1 / HE |
| IFP — Formalin, Neutral Buffered | Class 1 / PA |
| IFQ — Formulations, Mercuric Chloride For Tissue | Class 1 / PA |