'Nalco Visco 3950' is a microbicide/microbistat. Its Federal EPA registration number is: 10349-17. It was originally approved by EPA on 12 Jul 1979. Its registration got cancelled on 01 Jul 1987. It has a 'Danger' signal word. It has the following active ingredients: Methylene bis(thiocyanate). It's approved for 1 sites including secondary oil recovery injection water. It is also approved for 1 pests and pest groups including but not limited to slime-forming bacteria.