Quote Originally Posted by Photo Engineer View Post
Sodium Azide is quite toxic. I will not use it. Phenol is very good, but now on a restricted list.

PE
but also phenol is not really benign.....
anyway, what do you think about those substances?
Benzalkonium_chloride
Polyaminopropyl_biguanide
Polyhexanide


what are the bactericides-fungicides in contemporary commercial (film/paper) emulsions?