pKa negative logarithm (to the base 10) of sc subcutaneous the acid dissociation constant SCAS semi-continous activated sludge pKb negative logarithm (to the base 10) of SCTER smallest chronic toxicity exposure the base dissociation constant ratio (TER) PNEC predicted no effect concentration SD standard deviation (compartment to be added as subscript) se standard error po by mouth SEM standard error of the mean POP persistent organic pollutants SF safety factor ppb parts per billion (10 -9) SIMS secondary ion mass spectroscopy PPE personal protective equipment SOP standard operating procedures ppm parts per million (10 -6) sp species (only after a generic name) PPP plant protection product SPE solid phase extraction ppq parts per quadrillion (10 -24) SPF specific pathogen free ppt parts per trillion (10 -12) ssp subspecies PRL practical residue limit STP sewage treatment plant PT product type t tonne(s) (metric ton) PT(CEN) project team CEN t½ half-life (define method of estimation) PTT partial thromboplastin time TC Toxic Concentration Q*1 The Carcinogenic Potential of a TD Toxic Dose Compound, Quantified by the EPA's TG technical guideline, technical Cancer Risk Model TGD Technical guidance document (Q)SAR quantitative structure-activity relationship TID thermionic detector, alkali flame detector r correlation coefficient TER toxicity exposure r2 coefficient of determination TERI toxicity exposure ratio for initial RA risk assessment exposure RC risk characterisation toxicity exposure ratio following Rf retardation factor repeated exposure RfD reference dose TERLT toxicity exposure ratio following chronic exposure RH relative humidity tert tertiary (in a chemical name) RP reversed phase TLC thin layer chromatography RRT relative retention time TMDI theoretical maximum daily intake RS Registration Standard TNsG technical notes for guidance RSD relative standard deviation TOC total organic carbon s second TTC Toxicological-Threshold-of-Concern S solubility TWA time weighted average SAP serum alkaline phosphatase UF uncertainty factor (safety factor) SAR structure/activity relationship ULV ultra low volume SBLC shallow bed liquid chromatography
pKa negative logarithm (to the base 10) of the acid dissociation constant pKb negative logarithm (to the base 10) of the base dissociation constant PNEC predicted no effect concentration (compartment to be added as subscript) po by mouth POP persistent organic pollutants ppb parts per billion (10 -9) PPE personal protective equipment ppm parts per million (10 -6) PPP plant protection product ppq parts per quadrillion (10 -24) ppt parts per trillion (10 -12) PRL practical residue limit PT product type PT(CEN) project team CEN PTT partial thromboplastin time Q*1 The Carcinogenic Potential of a Compound, Quantified by the EPA's Cancer Risk Model (Q)SAR quantitative structure-activity relationship r correlation coefficient r2 coefficient of determination RA risk assessment RC risk characterisation Rf retardation factor RfD reference dose RH relative humidity RP reversed phase RRT relative retention time RS Registration Standard RSD relative standard deviation s second S solubility SAP serum alkaline phosphatase SAR structure/activity relationship SBLC shallow bed liquid chromatography sc subcutaneous SCAS semi-continous activated sludge SCTER smallest chronic toxicity exposure ratio (TER) SD standard deviation se standard error SEM standard error of the mean SF safety factor SIMS secondary ion mass spectroscopy SOP standard operating procedures sp species (only after a generic name) SPE solid phase extraction SPF specific pathogen free ssp subspecies STP sewage treatment plant t tonne(s) (metric ton) t½ half-life (define method of estimation) TC Toxic Concentration TD Toxic Dose TG technical guideline, technical TGD Technical guidance document TID thermionic detector, alkali flame detector TER toxicity exposure TERI toxicity exposure ratio for initial exposure toxicity exposure ratio following repeated exposure TERLT toxicity exposure ratio following chronic exposure tert tertiary (in a chemical name) TLC thin layer chromatography TMDI theoretical maximum daily intake TNsG technical notes for guidance TOC total organic carbon TTC Toxicological-Threshold-of-Concern TWA time weighted average UF uncertainty factor (safety factor) ULV ultra low volume
CA-May13-Doc.4.6a%20-%20Nonanoic-PT2%20(old%2010)_draft%20AR.docx