Recommendation of appropriate amounts of petrolatum preparation to be applied at patch testing

Abstract

20 mg pet. preparation was the optimal dose for the Finn Chambers.

Skincare products containing low concentrations of formaldehyde detected by the chromotropic acid method cannot be safely used in formaldehyde-allergic patients

“…The petrolatum preparations and moisturizers were also tested in the same system, with 20 mg used. 20 The tests were applied to the upper part of the back, removed by the individuals after 48 h (day 2) and read on day 4 and day 8 (Fig. 1).…”

“…Patch test reactions to dilution series of formaldehyde, dimethyloldimethylhydantoin (DMDMh), dimethylhydantoin (DMh) and repeated open application test (ROAT) moisturizers containing high (H), medium (M) and low (L) levels of formaldehyde and control (0) moisturizer in individuals with(1)(2)(3)(4)(5)(6)(7)(8)(9)(10)(11)(12)(13)(14)(15) and without(16)(17)(18)(19)(20)(21)(22)(23)(24)(25)(26)(27) hypersensitivity to formaldehyde, as well reactions to the various aqua; pet, petrolatum. aThe strongest recorded reaction on day 4 or day 8 is given.…”

Patch Testing To a Textile Dye Mix by the International Contact Dermatitis Research Group

“…The dose for the petrolatum preparations was 20 mg for a Finn Chamber. 11 The test chambers were left on the back for 2 days and readings were taken following the guidelines of the International Contact Dermatitis Research Group. 12 Reading days were day (D) 2 to 4 (reading 1).…”

Design and Feasibility of an International Study Assessing the Prevalence of Contact Allergy to Fragrances in the General Population: The European Dermato-Epidemiology Network Fragrance Study

“…Twelve specialized nurses from all participating centres were taught and practiced applying the amount of petrolatum preparation recommended by the European Society of Contact Dermatitis for application onto a Finn chamber [8]. …”