Draft Screening Assessment Parabens Group Chemical

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Draft Screening Assessment Parabens Group Chemical Draft Screening Assessment Parabens Group Chemical Abstracts Service Registry Numbers 94-13-3 94-18-8 94-26-8 99-76-3 120-47-8 4191-73-5 4247-02-3 Environment and Climate Change Canada Health Canada March 2020 Synopsis Pursuant to section 68 of the Canadian Environmental Protection Act, 1999 (CEPA), the Minister of the Environment and the Minister of Health have conducted a screening assessment of seven substances referred to collectively as the Parabens Group. Substances in this group were identified as priorities for risk assessment as part of the Identification of Risk Assessment Priorities (IRAP) approach’s 2015 review on the basis of human health concerns. The Chemical Abstracts Service Registry Numbers (CAS RN1), their Domestic Substances List (DSL) names and their common names are listed in the table below. Substances in the Parabens Group CAS RN DSL name Common name 94-13-3 Benzoic acid, 4-hydroxy-, propyl ester Propylparaben Benzoic acid, 4-hydroxy-, phenylmethyl 94-18-8 Benzylparaben ester 94-26-8 Benzoic acid, 4-hydroxy-, butyl ester Butylparaben 99-76-3 Benzoic acid, 4-hydroxy-, methyl ester Methylparaben 120-47-8 Benzoic acid, 4-hydroxy-, ethyl ester Ethylparaben Benzoic acid, 4-hydroxy-, 1-methylethyl 4191-73-5 iso-Propylparaben ester Benzoic acid, 4-hydroxy-, 2-methylpropyl 4247-02-3 iso-Butylparaben ester According to information submitted in response to a survey under section 71 of CEPA, methylparaben was reported to be manufactured and imported in Canada in 2011 in volumes of 981 kg and 563 000 kg, respectively. In a separate survey, ethylparaben, propylparaben, butylparaben, iso-propylparaben, and iso-butylparaben were not reported to be manufactured in Canada above the reporting threshold of 100 kg, but were reported to be imported into Canada in 2016 at volumes of 4 000 kg, 8 500 kg, 100 to 1 000 kg, 280 kg, and 230 kg, respectively. Benzylparaben was not reported to be imported or manufactured above threshold values in 2016. 1 The Chemical Abstracts Service Registry Number (CAS RN) is the property of the American Chemical Society, and any use or redistribution, except as required in supporting regulatory requirements and/or for reports to the Government of Canada when the information and the reports are required by law or administrative policy, is not permitted without the prior written permission of the American Chemical Society. i Parabens are widely used as preservatives and fragrance ingredients in cosmetic products, such as moisturizers, make-up, toothpaste, hair/shaving products, and are used as antimicrobial preservatives, fragrance ingredients and flavour enhancers in natural health products (NHPs). Parabens are also used in pest control products, consumer products, and in prescription and non-prescription drugs. Methylparaben and propylparaben are permitted for use as preservatives in certain foods and beverages sold in Canada. Parabens are also naturally present in foods, such as berries, fruit, wine and vanilla. The ecological risks of the substances in the Parabens Group were characterized using the ecological risk classification of organic substances (ERC), which is a risk-based approach that uses multiple metrics for both hazard and exposure, with weighted consideration of multiple lines of evidence for determining risk classification. Hazard profiles are based principally on metrics regarding mode of toxic action, chemical reactivity, food-web-derived internal toxicity thresholds, bioavailability, and chemical and biological activity. Metrics considered in the exposure profiles include potential emission rate, overall persistence and long-range-transport potential. A risk matrix is used to assign a low, moderate or high level of potential concern for substances based on their hazard and exposure profiles. According to the outcome of the ERC analysis, substances in the Parabens Group are considered unlikely to be causing ecological harm. Considering all available lines of evidence presented in this draft screening assessment, there is low risk of harm to the environment from methylparaben, ethylparaben, propylparaben, butylparaben, benzylparaben, iso-propylparaben, and iso-butylparaben. It is proposed to conclude that methylparaben, ethylparaben, propylparaben, butylparaben, benzylparaben, iso-propylparaben, and iso-butylparaben do not meet the criteria under paragraphs 64(a) or (b) of CEPA as they are not entering the environment in a quantity or concentration or under conditions that have or may have an immediate or long-term harmful effect on the environment or its biological diversity or that constitute or may constitute a danger to the environment on which life depends. Animals exposed to methylparaben in a repeat dose study showed clinical signs of ill- health, stomach erosion, spleen and thyroid atrophy, and mortality at the highest dose. Adverse effects were not reported in reproductive and prenatal developmental toxicity studies or in a study of male reproductive development. Predominant sources of exposure of the general population of Canada to methylparaben include cosmetics, NHPs, and prescription and non-prescription drugs. Margins of exposure based on biomonitoring data from the general population aged 3 to 79 years were considered adequate. Margins of exposure between the critical effect level and estimates of exposure to certain NHPs are considered potentially inadequate to account for uncertainties in the health effects and exposure databases. Repeated exposure to ethylparaben at high doses resulted in depression, decreased motor activity and mortality in animal studies. Gestational exposure to ethylparaben ii resulted in enlargement of brain ventricles and hydronephrosis in fetuses. Prenatal development of the male reproductive system and male pubertal development were not affected by ethylparaben exposure. The general population of Canada is predominantly exposed to ethylparaben via cosmetics, NHPs, and non-prescription drugs. Margins of exposure based on biomonitoring data from the general population were considered adequate to address uncertainties in the health effects and exposure databases. Propylparaben did not demonstrate significant adverse effects in repeat dose dietary toxicity studies. Adverse effects were not reported in a reproduction and developmental toxicity screen, or in studies of male and female pubertal and reproductive development. Predominant sources of exposure of the general population of Canada to propylparaben include cosmetics, NHPs, and prescription and non-prescription drugs. Margins of exposure based on biomonitoring data from the general population were considered adequate to address uncertainties in the health effects and exposure databases. Margins of exposure between the critical effect level and estimates of oral exposure to certain NHPs (at the highest dose and frequency recommended in the directions of use) are considered inadequate to address uncertainties in the health effects and exposure databases. The critical effect for butylparaben was prenatal development of the reproductive system. Gestational exposure to butylparaben was associated with delayed onset of puberty, altered morphology of reproductive organs and reduced sperm count and motility in offspring. The general population of Canada is predominantly exposed to butylparaben via cosmetics, NHPs, and non-prescription drugs. Margins of exposure based on biomonitoring data from the general population aged 3 to 79 years were considered adequate. Margins of exposure between critical effects and estimated of exposure to certain cosmetics, non-prescription drugs and NHPs are considered potentially inadequate to account for uncertainties in the health effects and exposure databases. The health effects database for benzylparaben is limited. A read-across approach was employed to select a critical effect of prenatal reproductive development based on butylparaben. No sources of exposure of the Canadian population to benzylparaben were identified. However, a biomonitoring study reported that benzylparaben was identified in the urine of pregnant Canadian women. Margins of exposure based on biomonitoring data from Canada, the United States and Europe are considered adequate to address uncertainties in the health effects and exposure databases. Repeated exposure to iso-propylparaben resulted in changes in serum histochemistry, as well as renal and hepatic effects. The predominant source of exposure to iso- propylparaben is via the use of cosmetics, NHPs, and non-prescription drugs. Margins of exposure between the critical effect level and estimates of exposure to iso- propylparaben are considered adequate to address uncertainties in the health effects and exposure databases. iii The critical effect identified for iso-butylparaben was reduced sperm motility and reduced epididymal sperm count in young males after maternal dosing (gestational and postnatal). The predominant source of exposure to iso-butylparaben is via use of cosmetics, NHPs and non-prescription drugs. Margins of exposure between the critical effect level and estimates of exposure to cosmetics, non-prescription drugs and NHPs containing iso-butylparaben are considered potentially inadequate to address uncertainties in the health effects and exposure databases. On the basis of the information presented in this draft screening assessment, it is proposed to conclude that methylparaben, propylparaben, butylparaben and iso- butylparaben meet the criteria under paragraph 64(c) of CEPA as they are entering or may enter the
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