| Abbreviation | Definition |
|---|---|
| ERW | Electrolyzed Reduced Water |
| Es | Einsteinium |
| Es | einsteinum |
| ES | Elementary Submodel |
| ES | Excited State |
| ES | Experimental Sequence |
| ESC | Emulsion Semi-Continuous |
| ESCA | Energy Spectroscopic Chemical Analysis |
| ESCB | Environmental Science and Chemistry Building |
| ESDPR | Egyptian Society for Drugs Production Reasearch |
| ESFC | European Symposium on Fluorine Chemistry |
| ESIS | European Chemical Substances Information System |
| ESIS | European Chemical Substances Information System (UK) |
| ESMC | European Society of Mathematical Chemistry |
| ESOC | European Symposium of Organic Chemistry |
| ESP | Emulsion Splitting Process |
| ESQC | Elastic Scattering Quantum Chemistry |
| ESQC | European Summerschool in Quantum Chemistry |
| ETBE | Ethyl tert-butyl ether |
| EtG | ethyl glucuronide |