A study was made of some carboxylated starches as builders in detergent formulations that contained linear alkylbenzene sulfonate. Two types of standard soiled cotton were used with water at 300 ppm hardness. Dicarboxyl starches and carboxymethyl starches having approximately two carboxyl groups per monomer unit were as effective as sodium tripolyphosphate on an equal weight basis in the detergent formulation. In a five‐day biochemical oxygen demand test these products showed low biodegradability.
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Wilham et al. (1970) studied this question.
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