| AAD | American Academy of Dermatology |
| ACR | acute:chronic ratio |
| ACS | American Cancer Society |
| AF | application factor |
| AOP | adverse outcome pathway |
| ASTM | American Society for Testing and Materials |
| BAF | bioaccumulation factor |
| BCC | basal cell carcinoma |
| BCF | bioconcentration factor |
| BMF | biomagnification factor |
| BOD | biological oxygen demand |
| BSAF | biota-sediment accumulation factor |
| °C | Celsius |
| CADDIS | Casual Analysis/Diagnosis Decision Information System |
| CARES | Coronavirus Aid, Relief, and Economic Security Act |
| CAS | Chemical Abstract Service |
| CBB | critical body burden |
| CBI | confidential business information |
| CDC | Centers for Disease Control and Prevention |
| CPSTF | Community Preventative Services Task Force |
| CSO | combined sewer overflow |
| CYP | cytochrome P450 |
| DMEM | Dulbecco’s modified Eagle’s medium |
| DOC | dissolved organic carbon |
| DOI | U.S. Department of the Interior |
| dph | days post hatch |
| DW | dry weight |
| EC50 | concentration of non-lethal effects on 50 percent of the test population |
| ECETOC | European Centre for Ecotoxicology and Toxicology Chemicals |
| ECHA | European Chemicals Agency |
| ECOSAR | Ecological Structure Activity Relationships |
| EIS | environmental impact statement |
| ENM | engineered nanomaterial |
| EPA | U.S. Environmental Protection Agency |
| EPA CDR | U.S. Environmental Protection Agency Chemical Data Reporting |
| ERA | ecological risk assessment |
| ESA | Endangered Species Act |
| FDA | U.S. Food and Drug Administration |
| FDA VCRP | U.S. Food and Drug Administration Voluntary Cosmetic Reporting Program |
| g | gram |
| GRASE | generally recognized as safe and effective |
| h | hour |
| HC5 | hazardous concentration |
| hpf | hours post fertilization |
| HR | hazard ratio |
| IC | inhibitory concentration |
| ICP-MS | inductively coupled plasma mass spectroscopy |
| ICP-OES | inductively coupled plasma optical emission spectrometer |
| INCI | International Nomenclature Cosmetic Ingredient |
| ISO | International Organization for Standards |
| IUPAC | International Union of Pure and Applied Chemistry |
| KC | keratinocyte carcinoma |
| Kd | dissociation constant |
| kg | kilogram |
| Kow | octanol/water partition coefficient |
| L | liter |
| LC50 | lethal concentration for 50 percent of the test population |
| LC-MS/MS | liquid chromatography–tandem mass spectrometry |
| LLOQ | lower limit of quantitation |
| LOD | limit of detection |
| LOEC | lowest observable effect concentration |
| Log | logarithm |
| LOQ | limit of quantitation |
| μg | microgram |
| mg | milligram |
| ml | milliliter |
| MOA | mode of action |
| MUsT | maximum usage trial |
| MW | molecular weight |
| NCI | National Cancer Institute |
| ND | assayed but not detected |
| NEPA | National Environmental Policy Act |
| ng | nanogram |
| NIH | National Institutes of Health |
| nm | nanometer |
| NOAA | National Oceanic and Atmospheric Administration |
| NOEC | no observed effect concentration |
| NOM | natural organic matter |
| NOWAC | Norwegian Women and Cancer |
| NP | nanoparticle |
| NSF | National Science Foundation |
| OECD | Organisation for Economic Co-operation and Development |
| OTC | over the counter |
| PCPC | Personal Care Products Council |
| PEC | predicted environmental concentration |
| pKa | acid dissociation constant |
| PNEC | predicted no effect concentration |
| POP | persistent organic pollutant |
| POTW | publicly owned treatment work |
| ppb | parts per billion |
| PPCP | pharmaceutical or personal care product |
| QA/QC | quality assurance and quality control |
| QSAR | quantitative structure activity relationship |
| RCT | randomized controlled trial |
| REACH | Registration, Evaluation, Authorisation and Restriction of Chemicals |
| ROS | reactive oxygen species |
| SMILES | simplified molecular input line entry system |
| SML | surface microlayer |
| SPE | solid phase extraction |
| SPF | sun protection factor |
| SPMD | semi-permeable membrane device |
| SS | steady state |
| SSC | squamous cell carcinoma |
| SSD | species sensitivity distribution |
| TiO2 | titanium dioxide |
| TMF | trophic magnification factor |
| TOF | turnover frequency |
| TSCA | Toxic Substance Control Act |
| UPF | universal protection factor |
| USFWS | U.S. Fish and Wildlife Service |
| UV | ultraviolet |
| UVA | ultraviolet A |
| UVB | ultraviolet B |
| UVC | ultraviolet C |
| UVR | ultraviolet radiation |
| WebICE | Web-based Interspecies Correlation Estimation application |
| WRR | water resistance retention |
| WW | wet weight |
| WWTP | wastewater treatment plant |
| ZnO | zinc oxide |