title: Formaldehyde in cosmetics in patch tested dermatitis patients with and without contact allergy to formaldehyde.
abstract: BACKGROUND
  Formaldehyde is a well-known contact sensitizer. Formaldehyde releasers are widely used preservatives in cosmetics.
  
  
  OBJECTIVE
  To survey the release of formaldehyde in cosmetics brought by patients investigated because of suspected allergic contact dermatitis, to compare it with information given by the manufacturers on the packages, and to investigate whether formaldehyde-allergic patients are potentially exposed to more cosmetics releasing formaldehyde than dermatitis patients without contact allergy to formaldehyde.
  
  
  METHODS
  Cosmetics from 10 formaldehyde-allergic and 30 non-allergic patients (controls) matched for age and sex were investigated with the chromotropic acid spot test, which is a semiquantitative method measuring the release of formaldehyde.
  
  
  RESULTS
  Formaldehyde was found in 58 of 245 (23.7%) products. Twenty-six of 126 (20.6%) leave-on products released formaldehyde, and 17 of 26 (65.4%) of these were not declared to contain formaldehyde or formaldehyde releasers. Among the rinse-off products, there were 32 of 119 (26.8%) formaldehyde-releasing products, and nine of 32 (28.0%) of these were not labelled as containing formaldehyde or formaldehyde releasers. Five of 10 formaldehyde-allergic patients brought leave-on products with ≥ 40 ppm formaldehyde, as compared with 4 of 30 in the control group (p = 0.029).
  
  
  CONCLUSIONS
  Cosmetic products used by formaldehyde-allergic patients that are not declared to contain formaldehyde or formaldehyde-releasing preservatives should be analysed.
authors.affiliation: Department of Occupational and Environmental Dermatology, Skåne University Hospital, Lund University, 20502 Malmö, Sweden.
authors.forename: Inese
authors.initials: I
authors.lastname: Hauksson
authors.affiliation: Department of Occupational and Environmental Dermatology, Skåne University Hospital, Lund University, 20502 Malmö, Sweden.
authors.forename: Ann
authors.initials: A
authors.lastname: Pontén
authors.affiliation: Department of Occupational and Environmental Dermatology, Skåne University Hospital, Lund University, 20502 Malmö, Sweden.
authors.forename: Marléne
authors.initials: M
authors.lastname: Isaksson
authors.affiliation: Department of Occupational and Environmental Dermatology, Skåne University Hospital, Lund University, 20502 Malmö, Sweden.
authors.forename: Haneen
authors.initials: H
authors.lastname: Hamada
authors.affiliation: Department of Occupational and Environmental Dermatology, Skåne University Hospital, Lund University, 20502 Malmö, Sweden.
authors.forename: Malin
authors.initials: M
authors.lastname: Engfeldt
authors.affiliation: Department of Occupational and Environmental Dermatology, Skåne University Hospital, Lund University, 20502 Malmö, Sweden.
authors.forename: Magnus
authors.initials: M
authors.lastname: Bruze
mesh_terms: D000293:Adolescent; D000328:Adult; D016022:Case-Control Studies; D003358:Cosmetics / Q000008:administration & dosage / Q000009:adverse effects* / Q000737:chemistry; D017449:Dermatitis, Allergic Contact / Q000209:etiology*; D005260:Female; D005557:Formaldehyde / Q000009:adverse effects* / Q000032:analysis; D006801:Humans; D008297:Male; D008875:Middle Aged; D010328:Patch Tests; D011310:Preservatives, Pharmaceutical / Q000009:adverse effects* / Q000032:analysis; D011356:Product Labeling; D055815:Young Adult
chemical_list: D003358:Cosmetics; D011310:Preservatives, Pharmaceutical; D005557:Formaldehyde
keywords: baseline series; chromotropic acid method; concentration; cosmetics; formaldehyde releasers; relevance