SODIUM SALT OF DISACCHARIDE COMPOUND, METHOD FOR PRODUCING THE SAME, AND USE OF THE SAME

摘要

Disclosed are a sodium salt represented by the average formula (I) below, and a method for producing such a sodium salt. (In the formula, m<SUB>1</SUB>, n<SUB>1</SUB>, m<SUB>2</SUB> and n<SUB>2</SUB> independently represent 0 or a positive number not more than 2, while satisfying m<SUB>1</SUB> + n<SUB>1</SUB> =2, m<SUB>2</SUB> + n<SUB>2</SUB> =2, 0 < M<SUB>1</SUB> + m<SUB>2</SUB> < 4 AND 0 < N<SUB>1</SUB> + n<SUB>2</SUB> < 4.) Also disclosed is a decomposition suppressing method which enables to have a sodium salt represented by the average formula (I) coexistent with a sodium salt represented by the general formula (IV) below. This method enables to improve long-term stability of a sodium salt represented by the general formula (IV).