dalbergione/machaerium

Five carpenters in a television set factory had allergic contact dermatitis of the hands, forearms and neck after contact with the sawdust of the Brazilian rosewood substitute Machaerium scleroxylon Tul. (Pao ferro). Patch tests with R-3,4-dimethoxydalbergione from Pao ferro and with two other

Experimental studies on the sensitizing capacity of naturally occurring benzoquinones, isolated from plants and woods have been carried out in guinea pigs of the Pirbright white strain. Seven compounds were available: primin, three dalbergiones, mansonia quinone (mansonone A),

In recent years an increasing number of cases of primary irritant and allergic contact dermatitis has been observed after using the South-American timber Pao ferro (Machaerium scleroxylum). Since 1978 140 cases have come to our knowledge. The patients were mainly cabinet and furniture makers