Heat-sensitive recording medium

A heat-sensitive recording medium in which a heat-sensitive recording layer is layered on a substrate,

• the heat-sensitive recording layer comprising a color former, a non-phenol-based developer and a non-phenol-based ultraviolet absorber,
• the non-phenol-based ultraviolet absorber comprising an oxanilide-based ultraviolet absorber,
• wherein the non-phenol-based developer comprises a compound represented by the following formula (1) and/or a compound represented by the following formula (2):
• wherein:
• R1, R2, R3, R4, R5, R7, R8, R9, R10 and R11 each independently represent a hydrogen atom, a halogen atom, a nitro group, an amino group, an alkyl group, an alkoxy group, an aryl group, an aryloxy group, an alkylcarbonyloxy group, an alkylcarbonylamino group, an arylcarbonylamino group, an alkylsulfonylamino group, an arylsulfonylamino group, a monoalkylamino group, a dialkylamino group, or an arylamino group;
• R6 and R12 each independently represent a halogen atom, a nitro group, an amino group, an alkyl group, an alkoxy group, an aryl group, an aryloxy group, an alkylcarbonyloxy group, an alkylcarbonylamino group, an arylcarbonylamino group, an alkylsulfonylamino group, an arylsulfonylamino group, a monoalkylamino group, a dialkylamino group, or an arylamino group;
• m represents an integer of 0 to 4;
• when m is 2 or more, a plurality of R6 is the same or different;
• n represents an integer of 0 to 4;
• and
• when n is 2 or more, a plurality of R12 is the same or different,
• wherein:
• R13, R14, R15, R16, R17, R19, R20, R21, R22 and R23 each independently represent a hydrogen atom, a halogen atom, a nitro group, an amino group, an alkyl group, an alkoxy group, an aryl group, an aryloxy group, an alkylcarbonyloxy group, an alkylcarbonylamino group, an arylcarbonylamino group, an alkylsulfonylamino group, an arylsulfonylamino group, a monoalkylamino group, a dialkylamino group, or an arylamino group;
• R18 represents a halogen atom, a nitro group, an amino group, an alkyl group, an alkoxy group, an aryl group, an aryloxy group, an alkylcarbonyloxy group, an alkylcarbonylamino group, an arylcarbonylamino group, an alkylsulfonylamino group, an arylsulfonylamino group, a monoalkylamino group, a dialkylamino group, or an arylamino group;
• o represents an integer of 0 to 4;
• and
• when o is 2 or more, a plurality of R18 is the same or different.