Chromic acid burns can lead to systemic toxicity by cutaneous absorption of the chrome seen surfaces more than 1% of the total body surface area. In order to illustrate the necessity of anticipate systematically this toxicity by a specific treatment, we describe the case of a patient with systemic toxicity in the least severe situation of chromic acid burn: the chromic acid was diluted to 0,02%, the burn was superficial second degree, both thermic and chemical, on the forearm, and extended only to 1% of the total body surface area. In spite of the specific treatment, our patient had a blood transfer of the chrome, however without any consequences on the renal and hepatic functions. He cicatrised in 2 weeks, and his blood and urinary chromium levels were normalised in 3 weeks. Without this specific early treatment, what would have been the consequences of a systemic toxicity even more important?