Fine cellulose fiber powder and method for producing fine cellulose fiber powder

Abstract

An object of the present disclosure is to provide a fine cellulose fiber powder that can be easily dispersed in water or the like. One aspect of the present disclosure is a fine cellulose fiber powder comprising a fine cellulose fiber and water, wherein the fine cellulose fiber has an average fiber width of 1 nm to 1000 nm, the fine cellulose fiber has a sulfate ester group represented by the following general formula (1), wherein n is an integer of 1 to 3, Mn+ is an n-valent cation, and a wavy line is a bonding site to another atom, the fine cellulose fiber has an amount of sulfur introduced due to the sulfate ester group of 0.3 mmol/g or more and 3.0 mmol/g or less, the powder has a median diameter of 800 m or less, and the powder has a moisture content of 50% by mass or less.

Dependencies are inferred from the claim text.