Member, container, chemical liquid storage body, reactor, distillation column, filter unit, storage tank, pipe line, and chemical liquid manufacturing method

A chemical liquid storage body comprising:

• a container;
• and a chemical liquid stored in the container,
• wherein at least a part of a liquid contact portion of the container is formed of a member that will be brought into contact with the chemical liquid,
• wherein a surface of the member is constituted with stainless steel containing chromium atoms and iron atoms,
• an atomic ratio of the chromium atoms to the iron atoms is measured from the surface of the member to a position 10 nm below the surface along a depth direction, a maximum value of the atomic ratio is found in a region extending 3 nm from the surface in the depth direction,
• the maximum value is 0.5 to 3.0,
• an average surface roughness of the surface of the member is equal to or lower than 10 nm
• the atomic ratio of the chromium atoms to the iron atoms at a position 10 nm deep from the surface of the member is 0.3 to 0.6 and
• wherein the chemical liquid contains one or more kinds of compounds selected from the group consisting of propylene glycol monomethyl ether acetate, propylene glycol monomethyl ether, cyclohexanone, propylene carbonate, γ-butyrolactone, isoamyl acetate, propylene glycol monoethyl ether, ethyl lactate, methyl methoxypropionate, cyclopentanone, diisoamyl ether, dimethyl sulfoxide, N-methylpyrrolidone, ethylene carbonate, cycloheptanone, 2-heptanone, butyl butyrate, isobutyl isobutyrate, undecane, pentyl propionate, isopentyl propionate, ethylcyclohexane, mesitylene, ethyl acetoacetate, dimethyl malonate, methyl pyruvate, and dimethyl oxalate.