Polymerizable liquid crystal material, polymerizable liquid crystal composition, polymer, optical film, optically anisotropic body, polarizing plate, anti-reflection film, display device, and method of producing polymerizable liquid crystal composition

A method of producing a polymerizable liquid crystal composition, comprising:

• a first step of confirming that a polymerizable liquid crystal material which comprises a polymerizable liquid crystal compound comprises less than 0.01 parts by mass of a salt represented by the following formula (I) per 100 parts by mass of the polymerizable liquid crystal compound, and 0.01 parts by mass or less of a nitrogen-containing compound represented by the following formula (II) per 100 parts by mass of the polymerizable liquid crystal compound;
• and
• a second step of mixing the polymerizable liquid crystal material with an organic solvent after the first step,
• where R1 to R4 each independently represent a hydrogen atom or a C1-C7 alkyl group, and X represents F−, Br−, Cl−, HSO4−, 1/2(HPO42−), H2PO4−, R—C(═O)—O−, 1/2(—O—(C═O)—R′—(C═O)—O−) or R—SO3−, where R represents a hydrogen atom or a monovalent hydrocarbon group, and R′ represents a single bond or a divalent hydrocarbon group,
• where R5 represents a hydrogen atom or a C1-C7 alkyl group, and R6 and R7 represent a hydrogen atom.