50/50 blend by volume of HS-600 and activated carbon. Various pollutant systems require both HS-600 and activated carbon for effective removal. The best of both, HS-600 with Activated Carbon. There are situations where providing either absorbent properties or reactive chemistry alone are not enough. For example, in the air stream, carbon can absorb the higher molecular weight hydrocarbons, but it does nothing to lower weight hydrocarbons. or acid gasses. XB-17 solves that problem by providing both absorbent properties and reactive chemistry. A 50/50 blend by volume of HS-600 and 60% CTC activated carbon, the carbon in XB-17 absorbs the higher molecular weights, while he HS-600 oxidizes the acid gases and lower molecular weight hydrocarbons.