| abstract |
The present invention provides a novel crystal of alanine alkyl ester sulfonate having low hygroscopicity and low corrosiveness, which can be produced industrially economically. The present invention relates to a crystal of alanine alkyl ester sulfonate represented by the formula (1) <CHEM> wherein R<1> is a methyl group or an ethyl group, when R<1> is a methyl group, R<2> is an ethylphenyl group or a dimethylphenyl group, and when R<1> is an ethyl group, R<2> is a methyl group, a phenyl group, a chlorophenyl group, an ethylphenyl group or a dimethylphenyl group. |