ENVIRA® E-635 is a quick acting, biodegradable, aldehyde-based microbiocide. It is effective against bacteria present in papermaking systems and is useful in preventing the formation of slime in all process areas. In acidic conditions it acts as a preservative and a biocide. As the pH increases, ENVIRA® E-635 becomes an increasingly better biocide. At a pH above 7.5 this product becomes a quick and powerful biocide. ENVIRA® E-635 is especially effective against slime forming bacteria and anaerobes, including SRB’s.