About

About Century Chemical Corp. For over 40 years, Bio-Tab has been a trusted septic treatment solution for professionals who believe problems should be solved at the source. Designed to work from the bottom up, Bio-Tab delivers beneficial bacteria that support natural waste digestion, help reduce solids buildup, and promote long-term system performance. Its time-release formulation provides consistent results without disrupting system balance, making it a reliable choice for residential, commercial, and municipal applications. Toi-De-Fresh delivers dependable odor control for portable restrooms and holding tanks in demanding environments. With clean, fresh fragrances and a stable liquid profile, Toi-De-Fresh performs consistently in both small and large tanks. Available in concentrated and ready-to-use options, including formaldehyde and non-formaldehyde formulas, it gives operators flexibility while helping maintain a positive user experience. These proven products are backed by Century Chemical Corporation, proudly manufacturing in Elkhart, Indiana since 1926. In 2026, Century celebrates its 100th anniversary, marking a century of practical innovation, consistent quality, and solutions professionals trust to perform!