CPSC 1997 — Lead and cadmium in children’s polyvinyl chloride (PVC) products

This U.S. Consumer Product Safety Commission (CPSC) staff report, dated 21 November 1997 and signed out of CPSC headquarters in Washington, D.C., is the federal regulator’s formal response to the October 1997 Greenpeace report alleging hazardous lead and cadmium levels in popular vinyl children’s products. CPSC staff obtained 12 of the 18 products that Greenpeace had identified as likely to be handled, mouthed, or chewed by young children, screened each colour or component for total Pb and Cd by AOAC 974.02 inductively-coupled-plasma emission spectrometry (ICP-ES), then conducted CPSC 30-stroke moist-filter-paper wipes (surface-dislodgeable) and ASTM-F963-style saline and 0.07 N HCl extractions (mouthing and chewing surrogates) on any product whose total concentration exceeded the CPSC screening thresholds (200 ppm Pb, 100 ppm Cd). Four of the eight screened-positive products yielded detectable dislodgeable or extractable Pb or Cd; none of those four produced a calculated daily exposure exceeding CPSC’s chronic-ingestion limits of 15 µg Pb/day or 9.2 µg Cd/day for a 1-year-old. CPSC concluded that none of the tested products posed a lead or cadmium hazard under reasonably foreseeable handling or use and declined to seek corrective action; the report explicitly preserves the gap between Greenpeace’s “hazardous levels are present” framing (substrate content + accelerated weathering) and CPSC’s “no hazardous exposure under foreseeable use” framing (release under unweathered hand-contact and mouthing conditions).

Key numbers

Screening thresholds and toxicity limits (pp. 4, 6–7, 9)

• Total-content screening thresholds for further testing (p. 4): >200 ppm Pb or >100 ppm Cd in PVC substrate triggered wiping and/or extraction studies. Below these thresholds the product was treated as not posing a foreseeable Pb/Cd exposure hazard.
• Chronic-ingestion limit for Pb (pp. 5, 9, Table 3): 15 µg Pb/day for children 6 years of age and under. Anchored to keeping blood Pb below the CDC level-of-concern of 10 µg/dL.
• Chronic-ingestion limit for Cd (pp. 5, 9–10, Table 3): 9.2 µg Cd/day for a 1-year-old, 13.5 µg Cd/day for a 3-year-old, and 20.2 µg Cd/day for a 6-year-old, derived from the U.S. EPA reference dose of 1 µg Cd/kg body weight/day applied to age-specific body weights.
• CPSC 30-stroke wipe procedure (p. 7): three separate moistened filter papers per product, lightly wiped 10 times each over the test surface (30 strokes total). Each filter is then digested in concentrated nitric acid and analyzed for Pb/Cd; results expressed as µg metal wiped from the surface.
• Extraction procedure (p. 7): three sequential 1-, 2-, and 3-hour extractions at 37 °C in 50 volumes of either 0.07 N HCl (chewing/ingestion surrogate) or normal saline (mouthing surrogate), per ASTM F 963; maximum 6 hours total exposure. Results expressed as µg metal extracted per gram of plastic.
• Conservative exposure assumptions when data unavailable (pp. 8–9): 1 filter-paper stroke = 1 child hand stroke; 50 % transfer efficiency of dislodgeable Pb/Cd from hand surface to ingestion pathway; 10 % of a food-toy consumed by chewing/ingestion over 30 days.
• Analytical detection limits (Table 1 footnote 2): “Not detected” defined as <10 ppm Pb or <50 ppm Cd by AOAC 974.02 ICP-ES.
• Pre-existing CPSC PVC-miniblind manufacturing guidance limit: 0.02 % (200 ppm) Pb by weight, developed in 1996 for PVC miniblinds specifically. The 1997 report explicitly cautions against applying the 0.02 % limit to other vinyl children’s products because of differences in manufacturing, accessibility, and use environment.
• Pre-existing 1978 CPSC paint Pb ban: 0.06 % (600 ppm) Pb by weight in paint for consumer use and in surface coatings on children’s articles, 16 C.F.R. Part 1303.

Total Pb and Cd in PVC substrate by product (Table 1; ppm by weight, AOAC 974.02 + ICP-ES)

Eight of the 12 products tested exceeded the screening thresholds of 200 ppm Pb or 100 ppm Cd in at least one component:

• Barbie Backpack (Pyramid Handbags) — Purple Plastic Heart panel: Cd 290 ppm; Pb not detected. Other panels (pink, purple, blue) Pb/Cd not detected.
• Modular Phone Cord, Ivory color (Gemini Industries): Pb 910 ppm; Cd not detected.
• Phone Cord (not named), Ivory color: Pb 110 ppm; Cd not detected. Other colours (white 30 ppm Pb, gray ND).
• KFC kid’s-meal food toy (Henry Gordy International) — Brown-plastic drumstick: Pb 20 ppm, Cd 510 ppm. Yellow plastic component: Pb ND, Cd 40 ppm. Yellow paint component: Pb 20 ppm, Cd 40 ppm.
• Barbie Slumber Tent (Ero Industries) — Ivory plastic pole: Pb 5,920 ppm, Cd not detected. Purple plastic 90 ppm Cd; pink plastic 100 ppm Cd.
• Tweety Totebag — Yellow plastic: Pb 20 ppm, Cd 160 ppm.
• Hackey Sack (Good Stuff Corp.) — Green plastic: Pb 3,270 ppm; Orange plastic: Pb 6,300 ppm; Blue plastic: Pb 70 ppm; Pink plastic: Pb 50 ppm.
• Umbrella A (Shaw Creations) — White paint (handle): Pb 50 ppm, Cd 20 ppm; orange/white paint (handle): Pb 80 ppm, Cd 10 ppm; multiple plastic colour panels 20 ppm Pb each.
• Umbrella B (Shaw Creations) — Light brown plastic 810 ppm Pb; red plastic 720 ppm Pb; orange plastic 750 ppm Pb; dark brown plastic 690 ppm Pb (all Cd ND).
• Halloween placemat (Barth-Dreyfuss) — multiple colour panels 150–210 ppm Pb, 10 ppm Cd each.
• Space Jam placemat (Zak Designs) — white plastic 90 ppm Pb; orange composite 120 ppm Pb; green composite 100 ppm Pb (all Cd ND).
• Ivory vinyl placemat (not named) — 100 ppm Pb, Cd ND.
• Minnie Mouse key bag (Disney Store) — pink bag: Cd 40 ppm; pink strip and pink latch components Pb/Cd ND.
• Raincoat (Warner Bros.) — yellow plastic 30 ppm Cd; red composite 50 ppm Cd; yellow composite 40 ppm Cd; blue composite 40 ppm Cd (all Pb ND).

Dislodgeable wipe and extraction results (Table 1; only positive results listed)

• Modular Phone Cord, Ivory color: wipe dislodgeable Pb 21 µg over a 25.4 cm length (30 strokes); 6-hour 0.07 N HCl extraction yielded 97.8 µg Pb/g (Table 1 footnote 5).
• KFC food-toy brown drumstick: wipe dislodgeable Cd 0.4 µg over 8 cm²; 6-hour saline extraction 0.72 µg Cd/g; 6-hour 0.07 N HCl extraction 18.6 µg Cd/g.
• Barbie Slumber Tent ivory plastic pole: wipe dislodgeable Pb 23.2 µg over 52 cm of pole length; HCl extraction not applicable since mouthing not anticipated.
• Tweety Totebag yellow plastic: 6-hour HCl extraction Cd not detected.
• Tweety Totebag orange and blue glitter components: 6-hour HCl extraction Pb not detected.
• Hackey Sack green plastic: 6-hour saline extraction 0.676 µg Pb/g; 6-hour HCl extraction 28.85 µg Pb/g.
• Hackey Sack orange plastic: 6-hour saline extraction 0.968 µg Pb/g.
• Barbie Backpack Purple Plastic Heart: 6-hour HCl extraction Cd not detected (despite 290 ppm Cd in substrate).
• Minnie Mouse pink bag: wipe dislodgeable Cd 0.9 µg over 41 cm² of keyring bag.
• Warner Bros. raincoat yellow plastic: wipe dislodgeable Cd 5.93 µg over 90 cm² of raincoat surface.

Calculated daily exposures for the four products with detectable dislodgeable or extractable Pb/Cd (Tables 2 and 3)

Worked examples in Table 3 demonstrate the per-day Pb or Cd intake a child would receive under CPSC’s hand-to-mouth and ingestion assumptions:

• Gemini phone cord (Pb pathway): 10-inch length yielded 0.7 µg Pb/stroke; reaching the 15 µg Pb/day limit would require 43 strokes/day on the cord (or 1 stroke/day over a 430-inch length). Table 2 hazard-assessment entry pairs the 43-strokes/day threshold with a 9.8 µg Pb/day exposure figure (the source does not state the activity assumption underlying the 9.8 µg/day value). CPSC verdict: not hazardous.
• Barbie tent pole (Pb pathway): unweathered wipe yielded 39 strokes/day to reach the 15 µg Pb/day limit. CPSC verdict: not hazardous because the pole is covered by the tent sheet, not exposed to repeated heat/sunlight, and is handled only during setup and takedown (likely by adults).
• Hackey Sack green and orange plastic (Pb pathway): assuming a child ingests 10 % of the toy over 30 days, calculated daily Pb intake was 1.92 µg/day (green) and 1.38 µg/day (orange). CPSC verdict: not hazardous.
• KFC food toy (Cd pathway): brown drumstick weighed 61 g; HCl-extractable Cd 18.6 µg Cd/g; if a child ingests 10 % of the toy over 30 days, calculated daily Cd intake is 18.6 µg/g × 61 g × 10 % / 30 days = 3.8 µg Cd/day. CPSC verdict: not hazardous (below the 9.2 µg Cd/day chronic limit for a 1-year-old).

Weathered-product reanalysis using Greenpeace’s own Tables 6, 7, and 8 (Table 4)

CPSC declined to perform accelerated weathering on the products (citing the products’ typical use environment not involving prolonged sunlight/heat) but reanalyzed Greenpeace’s own weathered dislodgeable Pb/Cd data using CPSC’s exposure model:

• Greenpeace Table 6 (new, unweathered items): the surface area a child would need to handle daily to reach the 15 µg Pb/day or 9.2 µg Cd/day limit ranged from 80.6 in²/day (Barbie tent pole, Pb) and 216.3 in²/day (Columbia raincoat, Pb) to 30,000 in²/day (Tweety totebag, Pb) and 4,600 in²/day (101 Dalmatian backpack, Cd).
• Greenpeace Table 7 (artificially weathered items): the surface area a child would need to handle daily dropped to as low as 3.6 in²/day (Barbie tent pole, Pb) and 151.8 in²/day (Columbia raincoat, Pb), but for the Pb pathway most weathered items still required 100s of in²/day (e.g., Minnie backpack 508.5 in²/day Pb; Barbie backpack 245.9 in²/day Pb). For the Cd pathway, the lowest weathered surface-area-per-day were Barbie backpack at 228.1 in²/day and Tweety totebag at 284.5 in²/day.
• Greenpeace Table 8 (90th-percentile worst-case weathered): smallest surface area at which a child would reach the 15 µg Pb/day or 9.2 µg Cd/day limit was the Barbie tent pole at 2.2 in²/day for Pb (worst weathered-Pb case in the dataset). Other weathered + 10 % worst cases ranged from 86.4 in²/day (Columbia raincoat Pb) to 358.3 in²/day (101 Dalmatian backpack Pb) for Pb; from 148.9 in²/day (Barbie backpack Cd) to 2,924.7 in²/day (Tweety rain hat Cd) for Cd.
• CPSC concluded that although the surface areas implied by Greenpeace’s worst-case weathered data are small for one product (Barbie tent pole, 2.2 in²/day Pb in Table 8), that product would not be subject to the assumed use pattern: poles are covered by the tent sheet, not repeatedly exposed to heat/sunlight, and are handled by adults during setup and takedown only. None of the six products in the weathered-data tables would be a Pb or Cd hazard under realistic use.

Hazard assessment outcome (Table 2 summary, pp. 8–9)

Of the 26 products in Greenpeace’s Table 1 cleared for public release at the time of the CPSC report:

• 18 were likely to be handled, mouthed, or chewed by young children;
• 12 were obtained from retailers; 6 could not be located;
• 8 of the 12 obtained products exhibited Pb above 200 ppm or Cd above 100 ppm in at least one component (screening threshold exceedance);
• 4 of those 8 had detectable dislodgeable (wipe) or extractable (saline / HCl) Pb or Cd;
• 0 of those 4 produced a calculated daily exposure exceeding the 15 µg Pb/day or 9.2 µg Cd/day limit under CPSC’s hand-to-mouth and ingestion assumptions.

Overall CPSC conclusion (p. 6, “Conclusions”): “None of the vinyl children’s products evaluated by CPSC staff are lead or cadmium consumer product hazards.” CPSC took no corrective action. Health Canada is cited as having released a similar finding in an investigation reported 30 October 1997.

Methods (brief)

Total Pb and Cd content. AOAC Method 974.02 acid digestion followed by inductively-coupled-plasma emission spectrometry (ICP-ES); results in ppm by weight of plastic; detection limits 10 ppm Pb, 50 ppm Cd. Each colour or component of each product was disaggregated and analyzed separately.

Surface-dislodgeable Pb/Cd (wipe). CPSC 30-stroke procedure: three separate moistened-filter-papers, each wiped 10 times over the test surface (30 strokes total); filters individually digested in concentrated nitric acid; total dislodgeable metal expressed as µg per surface area wiped (cm² or cm of cord length).

Extractable Pb/Cd (mouthing and chewing surrogates). ASTM F 963-derived procedure: 50-volume aqueous extractant (either normal saline as mouthing surrogate, or 0.07 N HCl as chewing/ingestion surrogate), three sequential extractions at 37 °C for 1, 2, and 3 hours; extractant decanted and replaced after each interval; total exposure up to 6 hours; results expressed as µg metal per gram of plastic.

Hazard model. Conservative exposure assumptions where data were absent: 1 filter-paper stroke = 1 child hand stroke; 50 % transfer efficiency from skin surface to ingestion pathway; 10 % of a food-toy ingested over 30 days. Age-specific Cd limits derived from EPA RfD = 1 µg Cd/kg/day at 1-, 3-, and 6-year-old body weights (yielding 9.2, 13.5, and 20.2 µg Cd/day respectively). Pb limit of 15 µg/day held constant for children ≤6 years (anchored to maintaining blood Pb below the 10 µg/dL CDC level-of-concern).

Weathering. CPSC did not perform weathering on its samples, citing that the categories involved (backpacks, raincoats, umbrellas, placemats, hackey sacks, tent poles, totebags, key bags, phone cords) are not repeatedly exposed to heat and sunlight in foreseeable use, unlike the 1996 PVC miniblind precedent. CPSC reanalyzed Greenpeace’s own weathered Tables 6, 7, and 8 using CPSC’s surface-area-per-day exposure model rather than rejecting the weathered data outright.

Reference comparison. Sole literature citation is Di Gangi, J. 1997. “Lead and cadmium in vinyl children’s products; a Greenpeace expose.” Greenpeace USA, Washington DC. October.

Implications

• Regulatory baseline (Pb in children’s PVC articles, pre-CPSIA). This report is the federal regulator’s pre-CPSIA-Section-101 framing of Pb in children’s PVC articles: hazard is defined by exposure (dislodgeable/extractable + foreseeable use) rather than by total substrate content. The 200 ppm Pb screening threshold and the 15 µg Pb/day chronic ingestion limit are anchored to maintaining blood Pb < 10 µg/dL, an era-specific CDC level-of-concern that the CDC has since revised downward (to 5 µg/dL in 2012 and 3.5 µg/dL in 2021). Sources citing CPSC’s 1997 hazard-assessment framework should flag the obsolete blood-Pb anchor; the substrate-content vs released-Pb distinction the CPSC drew here was substantively overridden by the 2008 CPSIA, which made total Pb content in any accessible substrate of a children’s product (currently 100 ppm) the operative federal threshold regardless of dislodgeability.
• Cd assessment framework. The age-specific Cd chronic-ingestion limits (9.2, 13.5, 20.2 µg/day for 1-, 3-, 6-year-olds) derived from EPA RfD = 1 µg Cd/kg body weight/day remain the comparison values U.S. regulators use for product-Cd exposure assessment of children; the CPSC framing here is consistent with later EPA IRIS treatment of Cd as a kidney-damage critical-effect agent.
• HMTc audit implications. For HMTc children’s-product certification work, this report establishes that 1990s-era PVC articles routinely contained substrate Pb at 700–6,000 ppm and Cd at 100–500 ppm in at least some components without triggering federal corrective action under the era’s release-based hazard framework. The 2008 CPSIA transition to content-based limits (currently 100 ppm Pb in accessible children’s-product substrate) is the regulatory event that retroactively reclassified most of these 1997-tested products as banned hazardous substances. HMTc threshold-setting for vinyl/PVC children’s-product categories should treat the 100 ppm CPSIA substrate limit as the regulatory floor (regulatory-alignment) and reflect the historical context — pre-2008 PVC articles in the supply chain may carry substrate Pb well above the modern limit even where release-based hazard models would not flag them.
• App. Not directly relevant to ingredient contamination_profile data because no food-matrix occurrence values are reported. Potentially relevant to a future children’s-article-screening surface that flags categories historically associated with PVC + lead/cadmium pigment content (tent poles, hackey sacks, phone cords, totebag glitter, raincoat plastic panels).
• Courses. Useful primary historical document for the regulatory-history teaching module on the substrate-content-vs-released-metal debate that motivated CPSIA Section 101 a decade later, and as a worked example of CPSC’s hazard-assessment math (surface area × dislodgeable concentration × transfer efficiency × strokes/day). The Greenpeace–CPSC weathering disagreement and the CPSC reanalysis of Greenpeace’s own Tables 6–8 are good case-study material for the methods module on accelerated-weathering protocols in product-safety testing.

Wiki pages this source may touch

• lead
• cadmium
• toys-substrate-materials
• toys-painted
• toys-balls
• infant-clothing

Verification notes

• Source identification. U.S. Consumer Product Safety Commission, “CPSC Staff Report on Lead and Cadmium in Children’s Polyvinyl Chloride (PVC) Products,” 21 November 1997, Washington, D.C. 20207. No DOI (the report is a federal staff document, not a journal article). Document identifier is the title and date; no separate CPSC report number is printed on the title page.
• Author attribution. No individual staff are credited on the title page; Table 3 (“Consumer Product Health Hazard Evaluation, 28 October 1997”) is signed by Brian C. Lee, PhD, DABT (CPSC Health Sciences staff). Authors field uses the institutional author “U.S. Consumer Product Safety Commission” rather than individual staff because the document is a staff report issued in the institutional voice.
• Source-tier rationale. evidence_tier: A: per Part 13, “government reports (FDA, EFSA, EPA, WHO, Codex), authoritative meta-analyses” are A-tier. CPSC is the U.S. federal regulatory agency with children’s-product-safety jurisdiction under the Consumer Product Safety Act and the Federal Hazardous Substances Act; this staff report is its formal public determination on Pb/Cd in vinyl children’s products.
• Source-type rationale. source_type: regulatory: matches the existing handling of other federal-agency staff reports in the corpus (e.g., FDA Closer-to-Zero documents). The report is the regulator’s evaluation of a third-party allegation (Greenpeace’s October 1997 expose) and its formal determination not to seek corrective action.
• License rationale. public-domain: works of the U.S. federal government are not subject to copyright under 17 U.S.C. § 105 and are in the public domain. CPSC staff reports are federal works.
• Frontmatter products: field. Four slugs selected from the 2026-05-18 taxonomy snapshot that best match the test scope:
  • toys-substrate-materials (primary route — most products tested are PVC plastic substrate, and the report’s central methodological contribution is screening of total Pb/Cd content of the PVC substrate);
  • toys-painted (Halloween placemat, Umbrella A handle, and KFC food-toy yellow paint components were tested as painted surfaces);
  • toys-balls (the Hackey Sack/Good Stuff Corp. product is a ball-format toy);
  • infant-clothing (the Warner Bros. raincoat is a children’s PVC garment).
  • Several test categories in the report (backpacks, totebags, umbrella canopies, vinyl placemats, phone cords, key bags, slumber-tent poles) do not have dedicated slugs in the current taxonomy snapshot. Per Phase 1 frontmatter discipline I did not invent slugs for them; the test results for those categories are documented in the page body but not routed by products: until matching slugs exist. This is flagged here rather than silently coerced.
• Frontmatter ingredients: [] is correct — the source is a children’s-article consumer-product safety assessment; no food ingredients are involved.
• Frontmatter matrices: [] is correct — no measurements are reported in any food matrix. The PVC plastic, paint, and composite substrates are non-food articles; the wipe and extraction results are reported in µg per surface area or µg per gram of plastic, not in food-matrix concentration units.
• Frontmatter metals: [Pb, Cd] is correct — the report addresses lead and cadmium only. No speciation question arises: 1997 ICP-ES of acid-digested PVC plastic yields total elemental Pb and Cd, not speciated forms; in the polymer matrix Pb and Cd are present as inorganic pigment salts (lead chromate, cadmium sulfide/selenide) and as Pb/Cd-based thermal stabilizers, all of which acid-digest to total Pb and Cd in the analytical workflow.
• Brand-firewall (Part 12, strict reading locked 2026-05-17). Multiple brand names appear in the source as the explicit subjects of the CPSC laboratory testing campaign that responds to a public Greenpeace allegation. Two Part 12 considerations apply:
  • Exception 1 (regulatory-event subject) is the relevant frame: the brand names are named in the public-record context of CPSC’s determination that the products do or do not pose a Pb/Cd hazard. The CPSC determination is a federal regulatory-event public record (the formal staff-report decision not to recall). I have included brand identifiers and manufacturer names in the Key numbers section because the report’s central public-record findings are inseparable from the products as labelled in the regulatory record.
  • I have NOT constructed a brand-by-brand contamination ranking, do not present per-brand percentile rankings, and do not compare brand performance. Where multiple brands appear (e.g., Shaw Creations Umbrellas A and B; Pyramid Handbags Barbie backpack vs Ero Industries Barbie slumber tent), the comparison is functional (different products manufactured by different parties, both subjects of the same regulatory testing exercise) not competitive. The numbers per product are the regulatory-record substrate Pb/Cd values, not contamination benchmarking.
  • Per the strict reading locked 2026-05-17, this is the regulatory-event exception’s intended use: documenting the federal regulator’s public determination on identified products. No brand-by-brand percentile or efficacy ranking is constructed. The page would be substantially less informative as a regulatory record without the manufacturer identifiers, because the Greenpeace–CPSC dispute is itself about specific identified products by manufacturer and is part of the public record.
• Wiki/HMTc firewall (Part 2). The Implications section flags the gap between the 1997 release-based hazard framework (200 ppm Pb screening threshold; 15 µg Pb/day exposure limit anchored to a since-revised 10 µg/dL blood-Pb level-of-concern) and the post-2008 content-based CPSIA Section 101 100 ppm Pb substrate limit, without proposing HMTc thresholds. No HMTc certification level is endorsed or critiqued.
• Speciation flag. N/A for Pb and Cd as analyzed here — 1997 ICP-ES on acid-digested PVC yields total elemental Pb and total elemental Cd. The Pb and Cd in PVC articles are present primarily as inorganic pigment salts (e.g., lead chromate yellow, cadmium sulfide/selenide red-orange) and as PVC heat-stabilizer compounds (e.g., dibasic lead phthalate, basic lead carbonate, cadmium soaps), all of which digest to total elemental Pb and Cd. No speciated assay is reported.
• Regulation-page mapping. The report references three regulatory anchors: (1) Federal Hazardous Substances Act (FHSA), 15 U.S.C. §§ 1261–1278, particularly § 1261(f) (“hazardous substance” definition) and § 1261(q)(1)(a) (banned hazardous substance applied to children’s articles); (2) Consumer Product Safety Act (CPSA), 15 U.S.C. §§ 2051–2084; (3) 1978 CPSC Pb-in-paint ban, 16 C.F.R. Part 1303 (0.06 % Pb in paint and surface coatings of children’s articles). None of these are currently in wiki/regulations/ as dedicated slugs. The 2008 CPSIA Section 101 children’s-product Pb substrate limit (15 U.S.C. § 1278a) is the modern statutory successor to the 1978 paint ban for substrate Pb and is the regulatory anchor cfa2012-cpsia-lead-fact-sheet already documents. The pre-CPSIA FHSA and CPSA mappings are flagged here for future regulation-page authoring under Part 10; not created speculatively from this single source.
• Greenpeace report cross-reference. The Greenpeace report (Di Gangi 1997) is the upstream paper this CPSC report responds to. It is not currently in the corpus. If a copy of “Lead and cadmium in vinyl children’s products; a Greenpeace expose” (Greenpeace USA, Washington DC, October 1997) becomes available, it should be ingested as a companion source page; the CPSC reanalysis tables (Table 4) would then route to the Greenpeace original’s Tables 6, 7, and 8 directly. Flagged for the next discovery sweep.
• Date and unit conventions. All Pb and Cd substrate concentrations are reported in ppm (mg/kg) by weight of plastic, equivalent to µg/g. Wipe results are reported in µg metal per stroke or per area wiped (not converted to concentration units). Extraction results are reported in µg metal per gram of plastic (µg/g) over a 6-hour extraction in either 0.07 N HCl or normal saline. Calculated daily exposures are in µg/day. CPSC chronic ingestion limits: Pb 15 µg/day for ≤ 6 years; Cd age-specific 9.2 / 13.5 / 20.2 µg/day for 1- / 3- / 6-year-olds.
• Folder context vs paper scope. The PDF lives under _extracted_infantcontact_02_Teethers_Pacifiers/02_Teethers_Pacifiers/ in the Kimi corruption-issue raw tree, but the paper itself does not test or discuss teethers or pacifiers. The folder name reflects the Kimi-agent’s batch-organization scheme, not the paper’s content. The products actually tested are children’s PVC articles intended for handling/mouthing/chewing (backpacks, raincoats, umbrellas, placemats, phone cords, key bags, totebags, slumber-tent components, a hackey sack ball, and a fast-food kid’s-meal food toy). Routing slugs reflect the paper’s actual content, not the folder name.
• Near-duplicates. None identified. The 1997 Health Canada companion investigation referenced on p. 5 is not currently in the corpus. The Greenpeace upstream report (Di Gangi 1997) is not currently in the corpus.
• Raw integrity. raw_sha256 = 19f5f56cd0120694442cf14fddfba495255c73771adc6d233158b2fc75e85e90 confirmed against the may21-kimi-novelty-2026-05-31.csv novelty-check record for this handle.
• Audit subagent findings applied (2026-06-01). Fresh-context Agent subagent audit returned verdict REVISE with two ⚠️ concerns in Check 1 (numerical fidelity), both verified against the PDF and applied: (1) The Modular Phone Cord ivory-color 97.8 µg Pb/g extraction value was misattributed in the first commit to “6-hour saline extraction”; Table 1 footnote 5 actually identifies it as the 6-hour 0.07 N HCl extraction. Corrected. (2) The Gemini phone-cord Table 3 worked-example line previously stated “Stated daily Pb exposure 9.8 µg/day at realistic use”; the source pairs 9.8 µg/day with the 43-strokes/day threshold figure in Table 2 without explicitly labelling 9.8 µg/day as a realistic-use estimate, so the “at realistic use” framing was wiki interpretation. Reframed to report the Table 2 entry without the interpretive label. Checks 2 (slug vocabulary), 3 (speciation and methods), 4 (Part 12 brand firewall, Exception 1 regulatory-event subject), and 5 (Part 2 wiki/HMTc firewall) returned ✅ clean.

Page history

The five most recent substantive edits to this page. The full version history lives in git; when DOI minting comes online (see schema docs), each entry below will also link to a version-pinned DataCite DOI.