With the view of making new types of chemicals accessible for investigations on drug hypersensitiveness, methods have been devised for sensitizing animals with diazomethane and mustard oil, two non-aromatic compounds.
Guinea pigs have been sensitized to diazomethane, a substance of high reactivity and known to cause severe allergic effects in man.
With the second substance, allylisothiocyanate, likewise capable of forming conjugates with substances in the animal body, sensitization effects have been obtained in man and in hogs. Sensitization in human beings was successful with one out of six individuals treated.
The observations indicate species and individual differences as regards the ability to become sensitized to various chemical compounds.