Priority Substances List Assessment Report for Nonylphenol and its Ethoxylates

List of Acronyms and Abbreviations

ACR : acute to chronic ratio

AF : application factor

AP : alkylphenol

APE : alkylphenol ethoxylate (as a general class)

APEC : alkylphenol carboxylate on ethoxylate chain (as a general class)

APnEC : alkylphenol carboxylate (on ethoxylate chain); where n = specific number of ethoxylate groups

APnEO : alkylphenol ethoxylate; where n = specific number of ethoxylate groups

BAF : bioaccumulation factor

BCF : bioconcentration factor

CAPE : alkylphenol with alkyl chain carboxylated

CAPEC : alkylphenol with carboxylate groups on both the alkyl and ethoxylate chains

CAS : Chemical Abstracts Service

CEPA : Canadian Environmental Protection Act

CEPA 1999 : Canadian Environmental Protection Act, 1999

CTV : Critical Toxicity Value

dw : dry weight

E₂ : estradiol

EC₅₀ : median effective concentration

EEQ : Estrogenic Equivalency Quotient

EEV : Estimated Exposure Value

EEV_EEQ : Estimated Estrogenic Exposure Value relative to NP

EEV_TEQ : Estimated Toxic Exposure Value relative to NP

ENEV : Estimated No-Effects Value

EO : ethoxylate

K_oc : organic carbon/water partition coefficient

K_ow : octanol/water partition coefficient

kg-bw : kilogram body weight

LC₅₀ : median lethal concentration

LD₅₀ : median lethal dose

LOEC : Lowest-Observed-Effect Concentration

LOEL : Lowest-Observed-Effect Level

MWWTP : municipal wastewater treatment plant

NOAEL : No-Observed-Adverse-Effect Level

NOEC : No-Observed-Effect Concentration

NOEL : No-Observed-Effect Level

NP : nonylphenol

NPE : nonylphenol ethoxylate or polyethoxylate (as a general class)

NPEC : nonylphenol carboxylate on ethoxylate chain (as a general class)

NPnEC : nonylphenol carboxylate on ethoxylate chain; where n = specific number of ethoxylate groups

NPnEO : nonylphenol ethoxylate; where n = specific number of ethoxylate groups

OP : octylphenol

OPE : octylphenol ethoxylate (as a general class)

pK_a : negative logarithm of the acid dissociation constant

PSL : Priority Substances List

PVC : polyvinyl chloride

SRT : sludge retention time

TEQ : Toxic Equivalency Quotient

TNPP : tris(nonylphenyl)phosphite

YES : yeast estrogen screen