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Scientific profiles are awaiting evidence review.

PFHxA

Quoted values stay tied to the cited study. Empty sections are gaps.

69 source-reported values from 24 filed studies. Values are shown as printed in each source, with the basis and page. Studies differ in samples, methods and limits, so values are not directly comparable. Measured samples do not represent every product on the market.

Identity

Perfluorohexanoic acid. Terminology authority. This citation supports the label only.

TODO: verify the applicable chemical form and identifier before populating a CAS field. Class and aggregate measurement pages require a scope definition rather than an assumed substance identifier.

Occurrence evidence

productvalueunitbasissource locationsource
SeafoodNDng/gFish cake, untreated control, Korea; mean ± SDPDF p.5, Table 2, PFHxA row, Control columnReduction of perfluorinated compound content in fish cake and swimming crab by different cooking methods
Fish, freshwater (tilapia, catfish, trout)0.05 (0.02-0.07)µg/kgCyprinus carpio fillets, Switzerland 2022-2024 (N = 11); average (min-max)PDF p.5, Table 1, PFHxA row, Cyprinus carpio Av (min-max) columnDetermination of per- and polyfluoroalkyl substances (PFAS) in six different fish species from Swiss lakes
Fish, freshwater (tilapia, catfish, trout)18%µg/kgCyprinus carpio fillets, Switzerland 2022-2024 (N = 11); frequency of positives above LOQPDF p.5, Table 1, PFHxA row, Cyprinus carpio F (%) columnDetermination of per- and polyfluoroalkyl substances (PFAS) in six different fish species from Swiss lakes
Fish, freshwater (tilapia, catfish, trout)0.22 (0.01-1.10)µg/kgPerca fluviatilis fillets, Switzerland 2022-2024 (N = 38); average (min-max)PDF p.5, Table 1, PFHxA row, Perca fluviatilis Av (min-max) columnDetermination of per- and polyfluoroalkyl substances (PFAS) in six different fish species from Swiss lakes
Fish, freshwater (tilapia, catfish, trout)26%µg/kgPerca fluviatilis fillets, Switzerland 2022-2024 (N = 38); frequency of positives above LOQPDF p.5, Table 1, PFHxA row, Perca fluviatilis F (%) columnDetermination of per- and polyfluoroalkyl substances (PFAS) in six different fish species from Swiss lakes
Cereal grains1.07ng/g w.w.Rice, Taiwan market samples (n = 10); medianPDF p.5, Table 2, Rice row, PFHxA row, PFHxA median columnConcentrations of perfluoroalkyl substances in foods and the dietary exposure among Taiwan general population and pregnant women
Cereal grains1.39ng/g w.w.Flour, Taiwan market samples (n = 10); medianPDF p.5, Table 2, Flour row, PFHxA row, PFHxA median columnConcentrations of perfluoroalkyl substances in foods and the dietary exposure among Taiwan general population and pregnant women
Meat and poultry1.02ng/g w.w.Pork, Taiwan market samples (n = 10); medianPDF p.5, Table 2, Pork row, PFHxA row, PFHxA median columnConcentrations of perfluoroalkyl substances in foods and the dietary exposure among Taiwan general population and pregnant women
Meat and poultry1.21ng/g w.w.Beef, Taiwan market samples (n = 10); medianPDF p.5, Table 2, Beef row, PFHxA row, PFHxA median columnConcentrations of perfluoroalkyl substances in foods and the dietary exposure among Taiwan general population and pregnant women
Meat and poultry1.02ng/g w.w.Chicken, Taiwan market samples (n = 10); medianPDF p.5, Table 2, Chicken row, PFHxA row, PFHxA median columnConcentrations of perfluoroalkyl substances in foods and the dietary exposure among Taiwan general population and pregnant women
Meat and poultry1.69ng/g w.w.Liver, Taiwan market samples (n = 10); medianPDF p.5, Table 2, Liver row, PFHxA row, PFHxA median columnConcentrations of perfluoroalkyl substances in foods and the dietary exposure among Taiwan general population and pregnant women
Seafood1.08ng/g w.w.Salmon, Taiwan market samples (n = 10); medianPDF p.5, Table 2, Salmon row, PFHxA row, PFHxA median columnConcentrations of perfluoroalkyl substances in foods and the dietary exposure among Taiwan general population and pregnant women
Seafood1.20ng/g w.w.Oyster, Taiwan market samples (n = 10); medianPDF p.5, Table 2, Oyster row, PFHxA row, PFHxA median columnConcentrations of perfluoroalkyl substances in foods and the dietary exposure among Taiwan general population and pregnant women
Seafood0.87ng/g w.w.Shrimp, Taiwan market samples (n = 10); medianPDF p.5, Table 2, Shrimp row, PFHxA row, PFHxA median columnConcentrations of perfluoroalkyl substances in foods and the dietary exposure among Taiwan general population and pregnant women
Seafood0.98ng/g w.w.Clam, Taiwan market samples (n = 10); medianPDF p.5, Table 2, Clam row, PFHxA row, PFHxA median columnConcentrations of perfluoroalkyl substances in foods and the dietary exposure among Taiwan general population and pregnant women
Seafood1.07ng/g w.w.Squid, Taiwan market samples (n = 10); medianPDF p.5, Table 2, Squid row, PFHxA row, PFHxA median columnConcentrations of perfluoroalkyl substances in foods and the dietary exposure among Taiwan general population and pregnant women
Fish, freshwater (tilapia, catfish, trout)1.04ng/g w.w.Grass Carp, Taiwan market samples (n = 10); medianPDF p.5, Table 2, Grass Carp row, PFHxA row, PFHxA median columnConcentrations of perfluoroalkyl substances in foods and the dietary exposure among Taiwan general population and pregnant women
Eggs0.82ng/g w.w.Egg, Taiwan market samples (n = 10); medianPDF p.5, Table 2, Egg row, PFHxA row, PFHxA median columnConcentrations of perfluoroalkyl substances in foods and the dietary exposure among Taiwan general population and pregnant women
Liquid milk, cow0.03ng/mLMilk, Taiwan market samples (n = 10); medianPDF p.5, Table 2, Milk row, PFHxA row, PFHxA median columnConcentrations of perfluoroalkyl substances in foods and the dietary exposure among Taiwan general population and pregnant women
Bottled drinking water (purified, spring, artesian)0.24ng/Lbottled-water mean as printed; non-detect mean retained literallyPDF p. 8, Table 1, Bottled Water MeanUnregulated and Regulated PFASs in Bottled and Tap Water: Occurrence, Co-Occurrence Patterns, and Implications for Human Health and Regulatory Frameworks
Liquid milk, cow6.86 ± 11.80pg g−1Raw cow milk fraction Skimmed; mean ± SDPDF p.6 Table 2First Investigation of the Physiological Distribution of Legacy and Emerging Perfluoroalkyl Substances in Raw Bovine Milk According to the Component Fraction
Liquid milk, cow12.42 ± 21.10pg g−1Raw cow milk fraction Cream; mean ± SDPDF p.6 Table 2First Investigation of the Physiological Distribution of Legacy and Emerging Perfluoroalkyl Substances in Raw Bovine Milk According to the Component Fraction
Liquid milk, cow3.94 ± 8.60pg g−1Raw cow milk fraction Whole Milk; mean ± SDPDF p.6 Table 2First Investigation of the Physiological Distribution of Legacy and Emerging Perfluoroalkyl Substances in Raw Bovine Milk According to the Component Fraction
Tap drinking water5.3ng/Ldrinking-water sample D1PDF p3, Table 1, D1 rowPresence of Emerging Per- and Polyfluoroalkyl Substances (PFASs) in River and Drinking Water near a Fluorochemical Production Plant in the Netherlands
Tap drinking water4.7ng/Ldrinking-water sample D2PDF p3, Table 1, D2 rowPresence of Emerging Per- and Polyfluoroalkyl Substances (PFASs) in River and Drinking Water near a Fluorochemical Production Plant in the Netherlands
Tap drinking water2.9ng/Ldrinking-water sample D3PDF p3, Table 1, D3 rowPresence of Emerging Per- and Polyfluoroalkyl Substances (PFASs) in River and Drinking Water near a Fluorochemical Production Plant in the Netherlands
Tap drinking water0.29ng/Ldrinking-water sample D4PDF p3, Table 1, D4 rowPresence of Emerging Per- and Polyfluoroalkyl Substances (PFASs) in River and Drinking Water near a Fluorochemical Production Plant in the Netherlands
Tap drinking water0.27ng/Ldrinking-water sample D5PDF p3, Table 1, D5 rowPresence of Emerging Per- and Polyfluoroalkyl Substances (PFASs) in River and Drinking Water near a Fluorochemical Production Plant in the Netherlands
Tap drinking water<0.1ng/Ldrinking-water sample D6PDF p3, Table 1, D6 rowPresence of Emerging Per- and Polyfluoroalkyl Substances (PFASs) in River and Drinking Water near a Fluorochemical Production Plant in the Netherlands
Tap drinking water9.52ng/Lmedian in treated water; source uses zero for ND in statistical analysisPDF p5, section 3.1Organophosphate Flame Retardants and Perfluoroalkyl Substances in Drinking Water Treatment Plants from Korea: Occurrence and Human Exposure
Tap drinking water12.0 [10.0, 16.0]ng/Lunfiltered tap water; median [min, max] among quantifiable results or printed <LOQPDF p3, Table 2, unfiltered tap-water columnConcentrations of per- and polyfluoroalkyl substances (PFAS) in paired tap water and blood samples during pregnancy
Tap drinking water3.34 [0.3, 8.8]ng/Lsurface-water-derived produced drinking water; median [min, max], including source censoring treatmentPDF p5, Table 2, surface-water-derived drinking-water columnOccurrence, Fate, and Related Health Risks of PFAS in Raw and Produced Drinking Water
Tap drinking water0.15 [0.03, 0.35]ng/Lgroundwater-derived produced drinking water; median [min, max], including source censoring treatmentPDF p5, Table 2, groundwater-derived drinking-water columnOccurrence, Fate, and Related Health Risks of PFAS in Raw and Produced Drinking Water
Tap drinking water62.6ng/Ldrinking-water site P6, targeted quantified concentrationPDF p8, section 3.1 Quantitative StudyNon-Targeted PFAS Suspect Screening and Quantification of Drinking Water Samples Collected through Community Engaged Research in North Carolina’s Cape Fear River Basin
Tap drinking water0.2-8.4ng/Ldrinking-water application samples; content range or single reported valuePDF p11, Table 5, Drinking water Content columnDetermination of 51 per- and polyfluoroalkyl substances in raw water and drinking water by online solid-phase extraction coupled with ultra performance liquid chromatography-tandem mass spectrometry
Paperboard cartonsbelow their respective LOQsµg/kgMigration into all four simulants under standardized conditionsPDF p.7, section 2.3.2 and Figure 3 captionMigration Safety of Perfluoroalkyl Substances from Sugarcane Pulp Tableware: Residue Analysis and Takeout Simulation Study
Breast milkn.d.-28ng/LBreast milk, Austria, follow-up study 2014-2016 (n = 40); rangePDF p.11, Table 3, follow-up study block, PFHxA row, follow-up range columnPersistent Organic Pollutants in Austrian Human Breast Milk Collected between 2013 and 2016
Breast milkn.d.ng/LBreast milk, Austria, follow-up study 2014-2016 (n = 40); medianPDF p.11, Table 3, follow-up study block, PFHxA row, follow-up median columnPersistent Organic Pollutants in Austrian Human Breast Milk Collected between 2013 and 2016
Breast milk16ng/LBreast milk, Austria, follow-up study 2014-2016 (n = 40); 95th percentilePDF p.11, Table 3, follow-up study block, PFHxA row, follow-up P95 columnPersistent Organic Pollutants in Austrian Human Breast Milk Collected between 2013 and 2016
Carpet cleaners0%German consumer products, Cleaner samples (percentage with detected PFAS); percentage of samples detectedPDF p.7, Table 3, PFHxA row, Cleaner columnPerfluoroalkyl and polyfluoroalkyl substances in consumer products
Textiles, apparel and outdoor gear56%German consumer products, Outdoor samples (percentage with detected PFAS); percentage of samples detectedPDF p.7, Table 3, PFHxA row, Outdoor columnPerfluoroalkyl and polyfluoroalkyl substances in consumer products
Carpet cleaners40%German consumer products, Carpet samples (percentage with detected PFAS); percentage of samples detectedPDF p.7, Table 3, PFHxA row, Carpet columnPerfluoroalkyl and polyfluoroalkyl substances in consumer products
Breast milk<LODng/mLHuman milk, e-waste dismantling area, China (n = 150); maximumPDF p.6, Table 2, PFHxA row, Max columnAssociation Between Prenatal Exposure to Per‐ and Poly‐Fluoroalkyl Substances From Electronic Waste Disassembly Areas and Steroid Hormones in Human Milk Samples
Bottled drinking water (purified, spring, artesian)< LOQng/Ldetected below quantification in bottled-water group; paper lists six labels while saying sevenPDF p. 10 (56545), Occurrence in bottled water samplesOccurrence and health risk assessment of PFAS and possible precursors: a case study in a drinking water treatment plant and bottled water (south Catalonia, Spain)
Liquid milk, cow<LOQµg/kgCow milk; source table meanPDF p.5 Tables 1 to 2Occurrence of perfluoroalkyl substances in cow’s, goat’s and sheep’s milk - dietary intake and risk assessment
Eggs<LOQµg/kgChickens eggs; source table meanPDF p.4 Tables 2 to 3; LOQs p.3 Table 1Chickens’ eggs and the livers of farm animals as sources of perfluoroalkyl substances
Children's products100µg/m²Stuffed toys, PFAS migration (not total content); detection frequency (%)PDF p.5, Table 1, PFHxA row, DF (%) columnStuffed toys as a source of oral PFAS exposure: Migration into artificial saliva and exposure assessment
Children's products21.97µg/m²Stuffed toys, PFAS migration (not total content); mean migration (as reported)PDF p.5, Table 1, PFHxA row, Mean [μg/m²] columnStuffed toys as a source of oral PFAS exposure: Migration into artificial saliva and exposure assessment
Children's products0.22 - 120.73µg/m²Stuffed toys, PFAS migration (not total content); range of migrationPDF p.5, Table 1, PFHxA row, Range [μg/m²] columnStuffed toys as a source of oral PFAS exposure: Migration into artificial saliva and exposure assessment
Children's products23% (14/61)%Children's and bedding textile products, US (n = 61, targeted analysis); detection frequency (detected/analyzed)PDF p.5, Table 3, PFHxA row, targeted, number of detections columnHow Well Do Product Labels Indicate the Presence of PFAS in Consumer Items Used by Children and Adolescents?
Children's products35.7ng/gsame; maximumPDF p.5, Table 3, PFHxA row, targeted, maximum concentration (ng/g) columnHow Well Do Product Labels Indicate the Presence of PFAS in Consumer Items Used by Children and Adolescents?
Children's products0.736ng/cm2same; maximumPDF p.5, Table 3, PFHxA row, targeted, maximum concentration (ng/cm2) columnHow Well Do Product Labels Indicate the Presence of PFAS in Consumer Items Used by Children and Adolescents?
Bottled drinking water (purified, spring, artesian)0.32ng/Lbottled-water mean based on detections above MDL; ND literalPDF p. 4 (4398), Table 1 bottled-water mean and footnotes a/fTap vs Bottled: Assessing PFAS Levels and Exposure Risks in Singapore’s Drinking Water
Period underwear and reusable menstrual garments26.3%ng/gReusable feminine hygiene products, US (N = 19); detection frequencyPDF p.3, Table 1, PFHxA row, DF columnPer- and Polyfluoroalkyl Substances in Reusable Feminine Hygiene Products
Period underwear and reusable menstrual garmentsND−5.87ng/gReusable feminine hygiene products, US (N = 19); rangePDF p.3, Table 1, PFHxA row, Range (ng/g) columnPer- and Polyfluoroalkyl Substances in Reusable Feminine Hygiene Products
Textiles, apparel and outdoor gear84.0ng/gChildren's products, China, School uniform (n = 25); detection frequency (%)PDF p.5, Table 1, PFHxA row, School uniform DF columnPer- and Polyfluoroalkyl Substances in North American School Uniforms
Textiles, apparel and outdoor gear1.60ng/gChildren's products, China, School uniform (n = 25); median (non-detects set to 1/2 MDL)PDF p.5, Table 1, PFHxA row, School uniform Median columnPer- and Polyfluoroalkyl Substances in North American School Uniforms
Textiles, apparel and outdoor gearND-6.47ng/gChildren's products, China, School uniform (n = 25); rangePDF p.5, Table 1, PFHxA row, School uniform Range columnPer- and Polyfluoroalkyl Substances in North American School Uniforms
Textiles, apparel and outdoor gear81.3ng/gChildren's products, China, Outdoor wear (n = 16); detection frequency (%)PDF p.5, Table 1, PFHxA row, Outdoor wear DF columnPer- and Polyfluoroalkyl Substances in North American School Uniforms
Textiles, apparel and outdoor gear0.502ng/gChildren's products, China, Outdoor wear (n = 16); median (non-detects set to 1/2 MDL)PDF p.5, Table 1, PFHxA row, Outdoor wear Median columnPer- and Polyfluoroalkyl Substances in North American School Uniforms
Textiles, apparel and outdoor gearND-3.38ng/gChildren's products, China, Outdoor wear (n = 16); rangePDF p.5, Table 1, PFHxA row, Outdoor wear Range columnPer- and Polyfluoroalkyl Substances in North American School Uniforms
Children's products62.5ng/gChildren's products, China, Miscellaneous (n = 16); detection frequency (%)PDF p.5, Table 1, PFHxA row, Miscellaneous DF columnPer- and Polyfluoroalkyl Substances in North American School Uniforms
Children's products0.213ng/gChildren's products, China, Miscellaneous (n = 16); median (non-detects set to 1/2 MDL)PDF p.5, Table 1, PFHxA row, Miscellaneous Median columnPer- and Polyfluoroalkyl Substances in North American School Uniforms
Children's productsND-6.42ng/gChildren's products, China, Miscellaneous (n = 16); rangePDF p.5, Table 1, PFHxA row, Miscellaneous Range columnPer- and Polyfluoroalkyl Substances in North American School Uniforms
Breast milk32.4ng/LHuman milk, China (n = 1,151); detection rate (%)PDF p.6, Table 2, PFHxA row, DR (%) columnEmerging and Legacy Perfluoroalkyl Substances in Breastfed Chinese Infants: Renal Clearance, Body Burden, and Implications
Breast milk<LOQng/LHuman milk, China (n = 1,151); minimumPDF p.6, Table 2, PFHxA row, Min columnEmerging and Legacy Perfluoroalkyl Substances in Breastfed Chinese Infants: Renal Clearance, Body Burden, and Implications
Breast milk<LOQng/LHuman milk, China (n = 1,151); medianPDF p.6, Table 2, PFHxA row, 50th columnEmerging and Legacy Perfluoroalkyl Substances in Breastfed Chinese Infants: Renal Clearance, Body Burden, and Implications
Breast milk6.789ng/LHuman milk, China (n = 1,151); 95th percentilePDF p.6, Table 2, PFHxA row, 95th columnEmerging and Legacy Perfluoroalkyl Substances in Breastfed Chinese Infants: Renal Clearance, Body Burden, and Implications
Breast milk238.0ng/LHuman milk, China (n = 1,151); maximumPDF p.6, Table 2, PFHxA row, Max columnEmerging and Legacy Perfluoroalkyl Substances in Breastfed Chinese Infants: Renal Clearance, Body Burden, and Implications

Analytical methods

Regulatory references

Sources

Analytes · Methodology

References

Sources explicitly cited in this page's body.