Document XzZvQ5e7qBoj3ez5e6Np64QOK

Monsanto r O N -C-lOOTiOx-' 4TI : UOJCCT triRutct t TO : Dolores M. Wente, St. Louis N3A April 28, 1981 2,4-DICHL0R0PHEN0L TRANSBAS, INC. REW/DMW, 4/23/81 R. E. Walters B2SF c XC- ' (jr1 I^ h }ryLu^J APR 2 9 1331 P. J. Arnall E. Layton J.R.G.Ortiz R. C. Richardson J'. D. Wilson B3NJ 1740 . E2ND-*C B2SG N3A Here are the typicals and the ranges for all components of 0.1Z and larger in 2,4-DCP that you requested. 2,4-Dichlorophenol 93.8Z t 1.0Z 2,6-Dichlorophenol 2.6Z t 0.9Z p-Chlorophenol 0.6Z t 0.9Z 2,4,6-Trichlorophenol Phenol o-Chlorophenol 2.1Z 1.2Z 0.1Z t 0.2Z 0.7Z t 0.6Z Attached is Analytical Method 13,086 which outlines the Gas Liquid Chromatographic procedure for determination of assay of chlorophenols. J. D. Wilson furnished this statement on "dioxin" content. A retro spective analysis of 15 lots of 2,4-Dichlorophenol produced between May and November 1980 showed no detectable amount of tetrachlorodibenzodioxin in any of the samples. The analytical method used was capable of detecting 1 ng of 2,3,7 8-Tetrac'nlorodibenzodioxin per g of 2,4-Dichlorophenol (1 ppb, or 0.001 ppm). The method included extraction with petroleum ether of a solution of DCP in 1 N KOH, followed by fractionation on a basic alumina column and analysis by GC/MS. Recoveries of spiked 2,3,7,8-TCDD were in the range of 78-103Z in this series of experiments. If you need further information, let me know. d2 Attachment Dolores M. Wente CONFIDENTIAL SUBJECT TO PROTECTIVE ORDER. C02150