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Reactions in selected patients to 22 fragrance materials.

182 patients on the basis of 6 criteria were suspected of suffering from contact sensitization to cosmetics. 77 (42%) gave a positive reaction to one or more of a series of 22 fragrance and flavor raw materials. The hands were most often involved. Cinnamic alcohol, hydroxycitronellal, eugenol, coumarin, and abitol gave the most common positive reactions; less frequent were cinnamic aldehyde, dihydrocoumarin and dimethylcitraconate. Their relevance could not be traced. However, the first 4 substances were the most frequently identified in 79 suspected cosmetics sent in for analysis by the patients or their physicians. The stability of room-stored petrolatum-fragrance mixtures should be checked.

Cosmetics↗

Patch tests with fragrance materials and preservatives.

179 patients suspected of cosmetic allergy were patch tested with a series of 16 fragrance materials and 9 preservatives. In 67 patients (37.4%), 1 or more of these substances gave positive reactions. In the group of fragrance materials, the largest numbers of positive patch test reactions were seen to isoeugenol, oak moss, geraniol, alpha-amylcinnamic alcohol, and a mixture of alpha-amylcinnamic aldehyde and alpha-hexylcinnamic aldehyde. The fragrance mix in the ICDRG standard series detected nearly 80% of cases of contact allergy to fragrance materials other than its constituents. In the group of preservatives, Kathon CG and quaternium-15 scored the highest number of positive reactions. It is argued that the commonly used patch test concentrations of 2% for oak moss and geraniol may be too low to detect all cases of sensitization.

Cosmetics↗

Musk ambrette and chronic actinic dermatitis.

A patient with persistent photosensitivity and positive photopatch tests to musk ambrette and an after-shave lotion is reported. Phototests showed extreme sensitivity to UV radiation, especially UVB. Patch tests with the European Standard Series and some plant allergens were negative. Histology showed a granulomatous reaction with epithelioid and giant cells in the dermis.

Aged↗

A simple method of qualitative analysis for musk ambrette, musk ketone and musk xylene in cologne.

Musk ambrette has become one of the commonest photosensitizers in many countries and is the cause of persistent light reactions in many patients. A simple method is presented for qualitative analysis for musk ambrette and other nitromusks in colognes using thin-layer chromatography with toluene as carrier solvent and visualization under UVL. It is useful for identifying such colognes so that proper recommendations can be given to patients sensitive to musk ambrette. 14 of 32 men's colognes, analysed by TLC and confirmed on GC/MS, were found to contain musk ambrette, the concentration varying from 0.02 to 0.39% w/v.

Chromatography, Gas↗

Geraniol dermatitis.

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Acyclic Monoterpenes↗

Contact allergy to cosmetics: causative ingredients.

Of 1781 patients with contact dermatitis seen during a period of 6 years (1981-1986), 75 (4.2%) had allergy to cosmetic products. The face was most frequently affected. In many cases, the dermatitis was limited to the eyelids (18.7%) or the face (40.0%). Skin care products (moisturizing and cleansing cream/lotion/milk) accounted for more than half (52.3%), followed by nail cosmetics (8.0%), shaving preparations (8.0%) and deodorants (6.8%). The ingredients most often responsible were fragrances (45.1%), followed by the preservative Kathon CG (11.0%) and the emulsifier oleamidopropyl dimethylamine (9.8%). In 14 patients (18.7%), patch tests with the responsible cosmetic product were negative. In them, the diagnosis was made by use tests and/or repeated open application tests. Compulsory declaration of ingredients on cosmetic product labels in the EEC, analagous to the USA situation, would be of great benefit both to patients and to physicians.

Adolescent↗

Contact dermatitis in children.

125 children under the age of 12 years were patch tested over a period of 7 years. 60 (48%) of the children had 1 or more positive (+ve) reactions, of which 92% (55/60) were considered relevant. The most common allergens were metals (35 + ves), fragrances (24 + ves) and rubber compounds (11 + ves). 40 of the children were also tested for contact urticaria against food additives and fragrances, of whom 20 were positive (benzoic acid 14, cinnamaldehyde 12).

Acrolein↗

Interaction of cinnamaldehyde (a sensitizer in fragrance) with protein.

Formation of a cinnamaldehyde-protein conjugate in the skin by reaction of cinnamaldehyde with nucleophilic groups in proteins is considered to be responsible for the observed immunogenicity. The kinetics of the reaction of bovine serum albumin with cinnamaldehyde in aqueous solution at 30 degrees C have been investigated, and the rate of formation of conjugate over the pH range 6.4-10.5 showed a first-order dependence on cinnamaldehyde concentration. The cinnamaldehyde binding sites on the protein appeared mostly or exclusively to be the thiol groups of cysteine residues.

Acrolein↗

Penetration of the fragrance compounds, cinnamaldehyde and cinnamyl alcohol, through human skin in vitro.

The delivery of cinnamaldehyde and cinnamyl alcohol in fragrance through human skin has been investigated by in vitro penetration studies using full thickness human skin. Cinnamaldehyde was transformed to cinnamyl alcohol and cinnamic acid in the skin. The transformation took place in model protein solution, bovine serum albumin, as well as in skin homogenates. After conjugation of cinnamaldehyde with the protein, a lag time was observed after which cinnamyl alcohol and cinnamic acid were released. On the other hand, cinnamyl alcohol was not transformed in detectable amounts to either cinnamaldehyde or cinnamic acid during penetration of the skin.

1-Propanol↗