Sulfuric acid ester or salt thereof, and surfactant

A compound represented by the following formula:

• wherein
• R1 is a linear or branched alkyl group containing one or more carbon atoms or a cyclic alkyl group containing three or more carbon atoms, with a hydrogen atom that binds to a carbon atom being optionally replaced by a hydroxy group or a monovalent organic group containing an ester bond, the alkyl group optionally containing a carbonyl group when containing two or more carbon atoms, and the alkyl group optionally containing a monovalent or divalent heterocycle or being optionally in a cyclized form when containing three or more carbon atoms;
• R2 and R3 are each individually a single bond or a divalent linking group;
• R1, R2, and R3 contain six or more carbon atoms in total;
• X is H, a metal atom, NR44, imidazolium optionally containing a substituent, pyridinium optionally containing a substituent, or phosphonium optionally containing a substituent, where R4s are each H or an organic group and are the same as or different from each other;
• and
• any two of R1, R2, and R3 optionally bind to each other to form a ring.