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 provides crystals of alanine alkyl ester sulfonates represented by formula (
1
):
wherein R
1
is a methyl group or an ethyl group, provided that 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.
本发明提供了一种新型的丙
氨酸烷基酯
磺酸盐晶体,具有低吸湿性和低腐蚀性,可以经济地进行工业生产。本发明提供了由式(1)表示的丙
氨酸烷基酯
磺酸盐晶体:其中R1是甲基基团或乙基基团,但当R1是甲基基团时,R2是
乙基苯基团或二甲基苯基团;当R1是乙基基团时,R2是甲基基团、苯基团、
氯苯基团、
乙基苯基团或二甲基苯基团。