Asthma due to inhaled chemical agents—persulphate salts and henna in hairdressers

Abstract

Summary Occupational type exposure tests in two female hairdressers with occupational asthma gave, in one, an immediate asthmatic reaction to the mixing of a bleach containing potassium persulphate with hydrogen peroxide and also immediate skin test reactions to sodium and potassium persulphate, and in the other a non‐immediate asthmatic reaction and negative skin tests to the persulphate preparations and also immediate skin and bronchial reactions to an extract of henna.