{"schemaVersion":"1.0","generatedAt":"2026-09-22","licence":{"status":"not-yet-granted","spdx":null,"statement":"No licence has yet been granted for SmellBook-created datasets. They are publicly readable; reuse beyond citation and quotation needs permission until a licence is published."},"node":{"entityType":"claim","urn":"smellbook:claim:hair-products-and-salon-air","key":"hair-products-and-salon-air","label":"Hair products and salon air","description":"In Taipei hairdressing salons, air pollutant concentrations were significantly higher around the working areas, so hair products were considered their major source, and formaldehyde levels were associated with the number of perming treatments, the number of workers and how often formaldehyde-releasing products were used.","scope":"Five salons measured for formaldehyde, volatile organic compounds, carbon dioxide and phthalates; it measures air composition, not odour.","evidenceClass":"scientific","canonicalUrl":"https://smellbook.com/evidence/claims/hair-products-and-salon-air","attribution":"SmellBook (https://smellbook.com)"},"outgoing":[{"relation":"cites-source","label":"cites source","entity":"smellbook:source:indoor-air-in-hairdressing-salons-2018","entityLabel":"Indoor air quality in hairdressing salons in Taipei","record":"/data/graph/source/indoor-air-in-hairdressing-salons-2018.json","provenance":[{"basis":"claim-record","field":"verifiedClaims[CLM-SALON-001].sourceIds","evidenceClass":"editorial"}]},{"relation":"claim-about","label":"claim about","entity":"smellbook:smell:hair-salon","entityLabel":"Hair Salon","record":"/data/graph/smell/hair-salon.json","provenance":[{"basis":"claim-record","field":"verifiedClaims[CLM-SALON-001].smellSlugs","evidenceClass":"editorial"}]}],"incoming":[],"corrections":[],"citation":null,"boundary":"Edges are typed and unweighted; none is a similarity, recommendation or personalization score. Browser-local Personal SmellBook data is never part of this export."}