Carboxylate, resist composition and method for producing resist pattern

A carboxylate represented by formula (I):

• wherein in formula (I),
• Ar is a phenylene group which has a hydroxy group at the o-position of Ar with respect to the bonding site of COO″,
• X1 represents an oxygen atom or a sulfur atom,
• R1 represents a halogen atom or a haloalkyl group having 1 to 12 carbon atoms,
• R2 represents a halogen atom, a hydroxy group, a haloalkyl group having 1 to 12 carbon atoms or an alkyl group having 1 to 12 carbon atoms, and —CH2— included in the haloalkyl group and the alkyl group may be replaced by —O— or —CO—,
• m1 represents an integer of 1 to 4, and when m1 is 2 or more, a plurality of groups in parentheses may be the same or different from each other,
• m2 represents an integer of 0 to 4, and when m2 is 2 or more, a plurality of R2 may be the same or different from each other, and
• Z+ represents an organic cation.

A carboxylate represented by formula (I):

• wherein in formula (I),
• Ar represents an aromatic hydrocarbon group having 6 to 18 carbon atoms which may have a substituent,
• X′ represents an oxygen atom or a sulfur atom,
• R1 represents a halogen atom or a haloalkyl group having 1 to 12 carbon atoms,
• R2 represents a halogen atom, a hydroxy group, a haloalkyl group having 1 to 12 carbon atoms or an alkyl group having 1 to 12 carbon atoms, and —CH2— included in the haloalkyl group and the alkyl group may be replaced by —O— or —CO—,
• at least one of 1 or more R2s is a hydroxy group,
• m1 represents an integer of 1 to 6, and when m1 is 2 or more, a plurality of groups in parentheses may be the same or different from each other,
• m2 represents an integer of 1 to 4, and when m2 is 2 or more, a plurality of R2 may be the same or different from each other, and
• Z+ represents an organic cation.