Spectrum Chemical manufactures and distributes fine chemicals with quality you can count on including those with CAS number 57-09-0, Whether you call it Cetyltrimethylammonium Bromide, Cetrimonium Bromide , CTAB or Hexadecyltrimethylammonium Bromide you can be assured the Cetyltrimethylammonium Bromide products offered by Spectrum, meet or exceed the grade requirements or specifications for each individual product.