Hydrocarbon-containing carboxylic acid, hydrocarbon-containing sulfonic acid, hydrocarbon-containing sulfuric acid ester or salt thereof, and surfactant

A compound represented by the following formula (1):

• wherein R1 to R5 are each H or a monovalent substituent;
• at least one of R1 or R3 is a group represented by the formula:
• —Y—R6;
• and at least one of R2 or R5 is a group represented by the formula:
• —X-A or a group represented by the formula:
• —Y—R6;
• Xs at the respective appearances are the same as or different from each other, and are each a divalent linking group or a direct bond;
• As at the respective appearances are the same as or different from each other, and are each —COOM, —SO3M, or —OSO3M, wherein M is H, a metal atom, NR74, imidazolium optionally containing a substituent, pyridinium optionally containing a substituent, or phosphonium optionally containing a substituent, wherein R7 is H or an organic group;
• R6s at the respective appearances are the same as or different from each other, and are each
• a group represented by the formula:
• —R10—CO—R11,
• a group represented by the formula:
• —R10—C(═O)O—R11,
• a group represented by the formula:
• —R11, or
• a group represented by the formula:
• —R10—NR8CO—R11,
• wherein R8 is H or an organic group;
• R10 is an alkylene group;
• and R11 is an alkyl group optionally containing a substituent;
• the group represented by the formula:
• —Y—R6 is
• a group represented by the formula:
• —R10—CO—R11 where Y is a direct bond,
• a group represented by the formula:
• —OC(═O)—R10—CO—R11 where Y is —OC(═O)—,
• a group represented by the formula:
• —C(═O)O—R10—CO—R11 where Y is —C(═O)O—,
• a group represented by the formula:
• —OC(═O)—R10—C(═O)O—R11 where Y is —OC(═O)—,
• a group represented by the formula:
• —C(═O)O—R11 where Y is —C(═O)O—,
• a group represented by the formula:
• —NR8CO—R10—CO—R11 where Y is —CONR8—, or
• a group represented by the formula:
• —CONR8—R10—NR8CO—R11 where Y is —NR8CO—,
• wherein R8 is H or an organic group, R10 is an alkylene group, and R11 is an alkyl group optionally containing a substituent, and when two or more of the groups represented by the formula:
• —Y—R6 are present, the groups at the respective appearances are the same as or different from each other;
• R4 and R5 are each H or a C1-C4 alkyl group;
• any two of R1 to R5 optionally bind to each other to form a ring;
• when R6 contains none of a carbonyl group, an ester group, and an amide group, X is a divalent linking group containing at least one selected from the group consisting of a carbonyl group, an ester group, an amide group, and a sulfonyl group.