Patent ID: 8877960

Claim:
A fluoroalkanesulfinic acid ammonium salt represented by the following general formula [2] wherein A + represents an ammonium ion, and R represents (a) a C 1-10 straight-chain or branched alkyl group, (b) a C 3-20 alicyclic organic group, (c) an organic group formed of a C 3-20 alicyclic organic group and a straight-chain alkylene group, (d) a C 3-30 monocyclic or polycyclic lactone, or (e) C 6-20 aryl group, hydrogen atoms on the alkyl group, the alicyclic organic group, the organic group formed of the alicyclic organic group and the straight-chain alkylene group, the monocyclic or polycyclic lactone, and the aryl group may partially or completely be replaced with fluorine, hydroxyl group, hydroxycarbonyl group, or a C 1-6 straight-chain, branched or cyclic alkoxy group, two hydrogen atoms on the same carbon forming the alkyl group, the alicyclic organic group or the organic group formed of the alicyclic organic group and the straight-chain alkylene group may be replaced with one oxygen atom to become a keto group, one having a nonconjugated unsaturated moiety (a double bond or triple bond) in the structure is excluded as R, each X independently represents a group selected from the group consisting of hydrogen atom, fluorine atom, a C 1-6 alkyl group, and a C 1-6 fluorine-containing alkyl group, n represents an integer of 1-8.