| Abbreviation | Definition |
|---|---|
| HTM | Heat Transfer Medium |
| HTMC | High Temperature Materials Chemistry |
| HTS | Hazardous and Toxic Substance |
| HTS | Heat Transfer Salt |
| HTS | High Temperature System |
| HTS | High Throughput Screening |
| HTST | High Temperature, Short Time |
| HTT | High Temperature Tetragonal |
| HTTO | High Temperature Thermal Oxidation |
| HV | High Viscosity |
| HVAP | Heat of Vaporization |
| HVCM | High value chemical manufacture |
| HVDM | High-Vacuum Densification Method |
| HVI | High Viscosity Index |
| HWIC | Harvard Women In Chemistry |
| I | Iodine |
| IA | Inflorescence Appearance |
| IAA | Indole Acetic Acid |
| IACC | Indonesian Association for Clinical Chemistry |
| IAPC | International Association of Physical Chemists |