A sulfonic acid derivative represented by the following general formula (1):
[Chemical formula 1]
RCOOCH
2
CH
2
CFHCF
2
SO
3
−
M
+
(1)
where R represents a substituted or unsubstituted C
1-30
linear, branched, or cyclic hydrocarbon group, or a substituted or unsubstituted C
6-30
aryl group, and M
+
represents a counter cation.