ALKALI METAL SALT OF FLUOROSULFONYL IMIDE

The present invention provides an alkali metal salt of fluorosulfonyl imide represented by the following general formula (I) and having a content of sulfate ions of 3,000 ppm by mass or less, a content of potassium ions of 10,000 ppm by mass or less, and a water content of 500 ppm by mass or less.