Sentence:  These widely advertised products , which are used primarily for washing clothes , are based on high-sudsing , synthetic <WSD>organic</WSD> actives ( sodium alkylbenzenesulfonates ) and contain up to 50 % by weight of sodium tripolyphosphate or a mixture of sodium tripolyphosphate and tetrasodium pyrophosphate . 
Meaning of the word marked with <WSD> tags:  relating or belonging to the class of chemical compounds having a carbon basis