Sahu et al. 2014 - heavy metals in cosmetics from Delhi markets

Sahu, Saxena, and Johnson reported a Centre for Science and Environment Pollution Monitoring Laboratory survey of commonly available cosmetics purchased from markets in Delhi, India. The study tested 30 lipsticks, 8 lip balms, and 3 anti-ageing creams for Pb, Cd, total Cr, and Ni, and tested 32 fairness/skin-whitening creams for total Hg. This page preserves the report’s ppm units and total-metal speciation while suppressing brand and shade names attached to individual contamination values.

Key numbers

• Report identity: CSE Pollution Monitoring Laboratory report PML/PR-45/2014, dated January 2014; investigators listed on the title page were Ramakant Sahu, Poornima Saxena, and Sapna Johnson.
• Sample frame: 30 lipsticks, 8 lip balms, and 3 anti-ageing creams were tested for Pb, Cd, total Cr, and Ni; 32 fairness creams, including 26 women’s products and 6 men’s products, were tested for total Hg.
• Lipsticks, Table 4 (ppm): Pb was ND in all 30 samples, and Cd was ND in all 30 samples.
• Lipsticks, Table 4 (ppm): total Cr was detected in 15 of 30 samples, with reported concentrations from 0.45 ppm to 17.83 ppm.
• Lipsticks, Table 4 (ppm): Ni was detected in 13 of 30 samples, with reported concentrations from 0.57 ppm to 9.18 ppm.
• Lip balms, Table 4 (ppm): all 8 lip-balm samples were ND for Pb, Cd, total Cr, and Ni.
• Anti-ageing creams, Table 4 (ppm): all 3 anti-ageing cream samples were ND for Pb, Cd, total Cr, and Ni.
• Chromium risk comparison, Table 5 and Results text: the report compared total Cr in the 15 chromium-positive lipstick samples to a Cr+6 ADI by conservatively assuming all measured total Cr was Cr+6. Under average lipstick use of 24 mg/day, source-calculated intake was 10.8% to 427.9% of ADI and exceeded 100% in 4 of 15 samples; under high use of 87 mg/day, the source-calculated intake reached 1551.2% of ADI and exceeded 100% in 13 of 15 samples.
• Fairness/skin-whitening creams, Table 6 (ppm): total Hg was detected in about 44% (14 of 32) samples, with reported concentrations from 0.10 ppm to 1.97 ppm as total mercury.
• Fairness/skin-whitening creams, Table 6 (ppm): the report converted total Hg to HgCl2 using molecular weights, giving HgCl2 values from 0.14 ppm to 2.67 ppm among detected samples.
• Fairness/skin-whitening creams, Results text: 3 of 32 samples (10.7%) exceeded the report’s cited U.S. FDA 1 ppm mercury comparator for cosmetics other than eye products. This is a source-side comparator, not an HMTc threshold.
• Men’s fairness creams, Table 6 (ppm): total Hg was detected in 1 of 6 men’s fairness-cream samples at 0.24 ppm; the other 5 men’s fairness-cream samples were ND.
• Methods QA note: all sample and standard measurements were run in triplicate, and recovery tests for all metals were reported as more than 90%.

Methods (brief)

The Pollution Monitoring Laboratory bought cosmetic samples from Delhi markets. Lipsticks, lip balms, and anti-ageing creams were prepared by digesting about 1.0 g sample in 5.0 mL concentrated HNO3:HClO4 (3:1), heating for 2-3 hours, cooling, adding more acid mixture, reheating, diluting to 25 mL, and filtering through Whatman filter paper Number 41. Pb, Cd, and Ni were determined by flame atomic absorption spectrometry with an air-acetylene flame; total Cr used an air-acetylene-nitrous oxide flame. Fairness creams were prepared for Hg using the CETAC application-note digestion sequence with about 0.2g sample, H2SO4, HNO3, KMnO4, HCl, and hydroxylamine, then analyzed for Hg by flameless atomic absorption spectrometry. The report states that five-point calibration curves, triplicate measurements, deuterium background correction, and recovery tests were used, but it does not report LOD/LOQ values, uncertainty intervals, or a representative-market sampling design.

Speciation: the report measured total Cr in lipsticks, not Cr(VI). Its Cr+6 risk comparison is a source-side conservative assumption for exposure modeling and is not an occurrence measurement of Cr(VI). Mercury in fairness creams is reported as total Hg and converted by the source to HgCl2 equivalents; no methylmercury or other mercury speciation is reported.

Implications

Certification (HMTc): This is B-tier finished-product occurrence evidence for India-market cosmetics, especially adult lipstick total Cr/Ni and skin-lightening/fairness-cream total Hg. The lipstick row should keep total Cr separate from Cr(VI), and the fairness-cream row should keep total Hg separate from methylmercury or any other Hg species.

Courses: The report is useful for teaching cosmetic product routing, source-side risk calculations, and the brand firewall. The original tables name brands and shades beside contamination values; the wiki keeps only product-form counts, ranges, detection proportions, and de-identified source-calculated risk summaries.

App: If adult cosmetics are included in consumer profiles, this source can support India-market context cards for lipstick total Cr/Ni and skin-lightening cream total Hg. The source should not be used to rank brands or to imply that total Cr measurements are Cr(VI) occurrence values.

Wiki pages this source may touch

• lipstick
• skin-lightening-cream
• whitening-products
• face-neck-leave-on-skin-care
• leave-on-preparations-other
• lead
• cadmium
• chromium
• nickel
• mercury-total

Verification notes

• PDF text was extracted with pdftotext -layout to /tmp/mfk_june8_heavy_metals_cosmetics_report.txt. The title page, PML description, Methods section, Results narrative, Tables 2-6, and Conclusions were checked against this page.
• No DOI is printed in the extracted report. Title/report number text, investigator names, raw handle MFK_heavy-metals-in-cosmetics-report, raw SHA-256 b6c0308c6cf591087855d1aa3d5ba3b2612374fd8d98f6bfe024e7bc9efeb6c5, and candidate cite-key sahu2014-cosmetics-metals-india were searched before creation; no existing source page was found.
• Units are copied exactly as ppm; no conversion to mg/kg, ug/kg, or ppb was performed.
• Speciation: the report explicitly says CSE tested total Cr and not Cr+6 in lipsticks, then assumed all Cr as Cr+6 only for an extra-precaution exposure comparison. This page records the occurrence analyte as total Cr (Cr), not Cr(VI). The fairness-cream table reports total mercury (tHg) and source-converted HgCl2 equivalents, not methylmercury.
• Source-side table/prose details preserved rather than normalized: the high-use Cr comparison range appears as 39.2% to 1551.2% in the Results narrative, while the Table 5 lowest high-use entry is 39.9%; this page reports the maximum and exceedance counts rather than recalculating the range.
• Brand firewall: Tables 2-6 attach brands, shade names, product names, manufacturers, and marketers to sample identities and contamination values. This page reports only aggregate product-form counts, detection proportions, ranges, and de-identified risk-comparison summaries.
• Evidence tier: B because the report is a primary analytical survey from a named nonprofit laboratory with QA/QC statements, triplicate measurements, and recovery above 90%, but it is not peer-reviewed, has a convenience Delhi-market sample, and does not report LOD/LOQ values or uncertainty intervals.
• Routing: all product slugs used in frontmatter appear in docs/gpt-collaboration/taxonomy-snapshot.md. Missing exact slugs: the snapshot has no non-retired adult lip-balm slug and no explicit adult anti-ageing cream slug. This page uses leave-on-preparations-other and face-neck-leave-on-skin-care rather than inventing new slugs.

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.