Radical generating catalyst, method for producing radical, method for producing oxidation reaction product, drug, and drug for agriculture and livestock

A liquid drug comprising:

• a radical generating catalyst;
• and
• at least one selected from the group consisting of halogenous acids and halites, wherein
• the liquid drug is not acidic, and
• the radical generating catalyst comprises an ammonium salt represented by the following chemical formula (XI) (excluding peroxodisulfate) and has a Lewis acidity of 0.4 eV or more,
• wherein the radical generating catalyst catalyzes radical generation from a radical source in a liquid that is not acidic, and
• the radical source is at least one selected from the group consisting of halogenous acids-and halites:
• where in the chemical formula (XI),
• and R11, R21, R31, and R41 are each a hydrogen atom or an alkyl group and may each comprise an ether bond, a carbonyl group, an ester bond, or an amide bond, or an aromatic ring, and R11, R21, R31, and R41 may be the same or different from each other, and
• X− is an anion (excluding a peroxodisulfate ion).