28757-47-3 Baquacil EPA Pesticide Chemical Code 111801 Poly(iminocarbonimidoyliminocarbonimidoylimino-1,6-hexanediyl) Poly(iminoimidocarbonyliminoimidocarbonyliminohexamethylene) Polyhexamethylene biguanide Polyhexamethylene biguanide, SRU Sanitized T 96-04