The présent invention relates to he use of an emulsion for protecting the skin against aggressive chemical agents, wherein this emulsion comprises at least one amphoteric chelafing agent which comprises a complex based on aluminium and on ethylenediaminetetraacefic acid or the trisodium sait thereof, having the gênerai formula [Al (Y) B „] CD with B being OH ,Bq 2 or H+, Y being a tétracarboxylate which can be protonated four times to form ethylenediaminetetraacetic acid, n being an integer equal to 0, 1, 2 or 3, D being a counterion, preferably Na+, c being an integer equal to 0, 1, 2 or 3 and c' being a relative number having the same absolute value as c.
