| Acronym | Meaning |
| TOXNET | Toxicology Network Of The National Library Of Medicine |
| TH | Total Hardness [of Water] |
| NIHHS | Notification Of Installations Handling Hazardous Substances Regulations (UK) |
| XNBR | Carboxylated Nitrile Rubber |
| TOC | Total Organic Carbon |
| PTWI | Provisional Tolerable Weekly Intake |
| IRLG | Interagency Regulatory Liaison Group |
| TDS | Total Dissolved Solids |
| DIPPR | Design Institute For Physical Property Data |
| VRDDO | Variable Retention Of Diatomic Differential Overlap |