Document yr5Ew085qoEK2O24n996L9xmV

INDUSTRIES PIGMENTS AND CHEMICALS DIVISION R. P. BATES Pifmant Sates February 13, 1973 Mr. Jerome Smith Lead Industries Association, 292 Madison Avenue New York, New York 10017 Inc. Dear Jerry: Re: MSI Std. Z-66.1-1973 The proposed specification looks OK, but I wonder why there is such a restriction on Antimony and its compounds. THE LD50 value is greater than 20 and its TLV value is 0.5 mg/M . On that basis it's no more - and probably less toxic than lead compounds. This will severely restrict the use of antimony compounds in fire retardant paints when they could be used if efficient compositions were developed RPB:cpd P.O. Box 420, Hightstown, N. J. 08520 (609) 448-3200 Division of N L industries, tnc. LIA-76646