The substances that our company uses do not leave stains, do not have an unpleasant smell and are not toxic.
The substance used by the company is not dangerous to get on a person's skin. 
( z1 endanger :polarity - :ARG0 ( z2 get :ARG1 ( z3 substance :ARG1-of ( z4 use :ARG0 ( z5 company ) ) ) :ARG2 ( z6 skin :part-of ( z7 person ) ) ) )