Comparative Ames-test study with dyes.

I Institut fi~r Toxikologie, Bayer A G, Postfaeh 101709, D-5600 Wuppertal 1 (F.R.G.)," 2 Ciba-Geigy A G, R 1034.2.01, Postfaeh, CH-4002 Basle (Switzerland); 3 lnstitutfiir Gewerbehygiene und Toxikologie, BASF A G, Postfach, D-6700 Ludwigshafen (F.R.G.)," 4 Hoechst A G, Postfach 800320, D-6230 Frankfurt 80 (F.R.G.); and 5 Central Toxicological Laboratory, ICI, Alderley Park, Nr. Macclesfield, Cheshire SK 10 4TJ (Great Britain)