aaronnorth
www.ukaps.org
a quick search on wikpedia about Glutaraldehyde (what excel & easycarbo is made up from) says
http
/en.wikipedia.org/wiki/Glutaraldehyde
However, it is toxic, causing severe eye, nose, throat and lung irritation, along with headaches, drowsiness and dizziness.
http
/en.wikipedia.org/wiki/Glutaraldehyde