Toxicity of sediment-associated substituted phenylamine antioxidants and their effects during early life stages of the Fathead minnow

Toxicity of sediment-associated substituted phenylamine antioxidants and their effects during early life stages of the Fathead minnow Substituted phenylamine antioxidants (SPAs) are used in the production of a variety of consumer products (lubricants, dyes, and polymers). Substituted phenylamine antioxidants (SPAs) increase the life of consumer products by preventing the chain reaction of free radical production initiated by exposure to heat, oxygen, ozone, radiation and stress. It is important to consider that based on their physicochemical properties, substituted phenylamine antioxidants (SPAs) are likely to partition into sediment when they enter an aquatic system. Thus the most likely environmentally relevant pathway for fish to become exposed to SPAs would be through contaminated sediment. This data set investigated the effect of sub chronic exposure in the early life stages of the Fathead minnow (Pimephales promelas) to sediment spiked with substituted phenylamine antioxidants (SPAs). An advantage of testing during the early embryo-larval stages of a fish life is that they tend to be more sensitive to toxicants compared to more mature life stages of fish. Four SPAs were tested in this dataset: Diphenylamine [DPA], N-phenyl-1-napthylamine [PNA], N-(1,3-dimethylbutyl)-N’-phenyl-1,4 phenylenediamine [DPPDA], and 4,4’-methylene-bis[N-sec-butylaniline] [MBA]. Fathead minnow (Pimephales promelas) eggs and larvae were exposed to spiked sediment. Sediment used in this data set was collected from two reference sites (1) Long Point Marsh and (2) Long Point Bay located in Lake Erie, Ontario, Canada. The dissipation of SPAs in sediment during equilibration and in overlaying water each day of the Fathead minnow (Pimephales promelas) test indicate that persistence of SPAs in the environment may be limited under similar conditions. From the perspective of concentration of SPAs in overlying water, total survival was the most sensitive endpoint for DPA, PNA, and DPPDA in respect to the early life stages of the Fathead minnow (Pimephales promelas) while growth and biomass production were the most sensitive endpoints for MBA. Supplemental Information For methods regarding how spiking sediment occurred, how testing and sampling occurred for the Fathead minnow (Pimephales promelas) and for analysis of substituted phenylamine antioxidants (SPAs) please refer to "Data Collection Methodology" in supporting documents. The Chemicals Management Plan (CMP) is a Government of Canada initiative aimed at reducing the risks posed by chemicals to Canadians and their environment. A key element of the Chemicals Management Plan is the monitoring and surveillance of levels of harmful chemicals in Canadians and their environment. Monitoring and surveillance are essential to identify and track exposure to hazards in the environment and associated health implications. Monitoring and surveillance programs provide the basis for making sound and effective public health and environmental health policies and interventions, as well as measuring the efficacy of control measures. In support of the Chemicals Management Plan, monitoring and surveillance initiatives were established to support Health Canada and Environment and Climate Change Canada scientists, in collaboration with external partners and researchers, to advance our knowledge. This initiative has allowed the Government of Canada to increase its commitment to a number of existing monitoring initiatives, as well as to support new efforts. For more information on the Chemicals Management Plan, please visit https://www.canada.ca/en/health-canada/services/chemica l-substances/chemicals-management-plan.html 2021-07-23 Environment and Climate Change Canada open-ouvert@tbs-sct.gc.ca Nature and Environmentsubstituted phenylamine antioxidants (SPAs)sedimenttoxicityChemicals Management Plan (CMP)ContaminantsFathead minnow (Pimephales promelas) CMP_FatheadMinnow_SedimentSPAs_Exposure_EN.csvCSV https://data-donnees.ec.gc.ca/data/substances/monitor/toxicity-of-sediment-associated-substituted-phenylamine-antioxidants-and-their-effects-during-early-life-stages-of-the-fathead-minnow/CMP_FatheadMinnow_SedimentSPAs_Exposure_EN.csv PGPC_tete-de-boule_APSSediment_Exposition_FR.csvCSV https://data-donnees.ec.gc.ca/data/substances/monitor/toxicity-of-sediment-associated-substituted-phenylamine-antioxidants-and-their-effects-during-early-life-stages-of-the-fathead-minnow/PGPC_tete-de-boule_APSSediment_Exposition_FR.csv Scientific Publication - Toxicity of sediment-associated substituted phenylamine antioxidants on the early life stages of Pimephales promelas and a characterization of effects on freshwater organisms.HTML https://doi.org/10.1002/etc.3828 View ECCC Data Mart (English)HTML https://data-donnees.ec.gc.ca/data/substances/monitor/toxicity-of-sediment-associated-substituted-phenylamine-antioxidants-and-their-effects-during-early-life-stages-of-the-fathead-minnow/ View ECCC Data Mart (French)HTML https://data-donnees.ec.gc.ca/data/substances/monitor/toxicity-of-sediment-associated-substituted-phenylamine-antioxidants-and-their-effects-during-early-life-stages-of-the-fathead-minnow/?lang=fr

Substituted phenylamine antioxidants (SPAs) are used in the production of a variety of consumer products (lubricants, dyes, and polymers). Substituted phenylamine antioxidants (SPAs) increase the life of consumer products by preventing the chain reaction of free radical production initiated by exposure to heat, oxygen, ozone, radiation and stress.

It is important to consider that based on their physicochemical properties, substituted phenylamine antioxidants (SPAs) are likely to partition into sediment when they enter an aquatic system. Thus the most likely environmentally relevant pathway for fish to become exposed to SPAs would be through contaminated sediment. This data set investigated the effect of sub chronic exposure in the early life stages of the Fathead minnow (Pimephales promelas) to sediment spiked with substituted phenylamine antioxidants (SPAs). An advantage of testing during the early embryo-larval stages of a fish life is that they tend to be more sensitive to toxicants compared to more mature life stages of fish.

Four SPAs were tested in this dataset: Diphenylamine [DPA], N-phenyl-1-napthylamine [PNA], N-(1,3-dimethylbutyl)-N’-phenyl-1,4 phenylenediamine [DPPDA], and 4,4’-methylene-bis[N-sec-butylaniline] [MBA].

Fathead minnow (Pimephales promelas) eggs and larvae were exposed to spiked sediment. Sediment used in this data set was collected from two reference sites (1) Long Point Marsh and (2) Long Point Bay located in Lake Erie, Ontario, Canada.

The dissipation of SPAs in sediment during equilibration and in overlaying water each day of the Fathead minnow (Pimephales promelas) test indicate that persistence of SPAs in the environment may be limited under similar conditions. From the perspective of concentration of SPAs in overlying water, total survival was the most sensitive endpoint for DPA, PNA, and DPPDA in respect to the early life stages of the Fathead minnow (Pimephales promelas) while growth and biomass production were the most sensitive endpoints for MBA.

Supplemental Information

For methods regarding how spiking sediment occurred, how testing and sampling occurred for the Fathead minnow (Pimephales promelas) and for analysis of substituted phenylamine antioxidants (SPAs) please refer to "Data Collection Methodology" in supporting documents.

The Chemicals Management Plan (CMP) is a Government of Canada initiative aimed at reducing the risks posed by chemicals to Canadians and their environment. A key element of the Chemicals Management Plan is the monitoring and surveillance of levels of harmful chemicals in Canadians and their environment. Monitoring and surveillance are essential to identify and track exposure to hazards in the environment and associated health implications. Monitoring and surveillance programs provide the basis for making sound and effective public health and environmental health policies and interventions, as well as measuring the efficacy of control measures.

In support of the Chemicals Management Plan, monitoring and surveillance initiatives were established to support Health Canada and Environment and Climate Change Canada scientists, in collaboration with external partners and researchers, to advance our knowledge. This initiative has allowed the Government of Canada to increase its commitment to a number of existing monitoring initiatives, as well as to support new efforts.

For more information on the Chemicals Management Plan, please visit https://www.canada.ca/en/health-canada/services/chemica l-substances/chemicals-management-plan.html

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