| Acronym | Meaning |
| IRPDS | Infrared Photothermal Deflection Spectroscopy |
| IDE | Insulin Degrading Enzyme |
| ESIG | European Solvents Industry Group |
| IFRTS | Internal-floating-roof Tanks |
| MCQR | Multiconfigurational Quadratic Response |
| CNDO/2-U | Universal CNDO/2 (extended To Full Periodic Table) |
| CSN-ICP | Conductive Solids Nebulizer-inductively Coupled Plasma |
| MIP | Mercury Intrusion Porosimetry |
| GMQDT | Generalized Multichannel Quantum Defect Theory |
| C.I. | Color Index |