Document q3dxwJ1q0y8OzGoeLx830LpMk

June 30, 1969 Mr. Ted Ellas Chemical Engineer County of Loe Angelea Health Dept. Room 400 220 North Broadway Loa Angelea, California 90012 Dear Mr. Ellaai Mr. Cardlllo'a letter of June 16 haa been forwarded.to me for reply. In that letter he requeated Information concerning our producta dealgnated aa Aroolora. Theae compounda are chlorinated blphenyla, chlorinated terphenyla and mixtures of theae materlala. The enclosed table showing the nomenclature, physical properties and oral and akin lethal doaea Indicates that theae products vary from colorleas oils to brittle realns depending on the degree of ohlorlnatlon. The 1200 aeries are biphenyls chlorinated to the extent of the last two dlglta In the Aroclor designation. For example, Aroclor 1248 la bi phenyl chlorinated to the extent of 42J(. The 5400 series are terphenyla chlorinated to 42% and 60 respectively. The 4400and 2500 materials are mixtures of biphenyls and terphenyla chlorinated to 65)1. The acute toxicity data typed at the bottom of the table Indicates that these materials are not seriously toxic from the standpoint of single oral doses or absorption through tha unbroken skin (insofar aa single exposure la ooncemed). I have enclosed alao a reprint describing tha results of chronic inhalation studies with two of theae materials and a copy of tha American Industrial Hygiene Association Hygienic Quids for ohlorlnated diphenyls (diphenyl and chlorinated biphenyl are the same materials--we prefer the biphenyl designation). MONS 0aS372 Mr. Ted Ellas June 30, 1969 Page Two Although the Aroclors are not seriously toxic from the standpoint of single exposures and are not primary skin Irritants or sensitizers, we do strongly recommend that prolonged and repeated skin contact be avoided. The liquid Aroclors are good solvents for the normal fate and oils on the skin and repeated exposure will lead to drying and chapping. More Important the liquid materi als can bo absorbed through the unbroken skin with possi ble systemic effects. The degree of hazard Increases if the Aroclors are In solution In oils. We further recommend that If the Aroclora are used at elevated temperatures, good mechanical exhaust ventilation be provided to remove any vapors which might be evolved. There Is no necessity to consider the above Information confidential. May I suggeat for prompt handling of requests for toxi city Information on Monaanto products that the requaat be directed to me or Dr. R. Emmet Kelly, Medical Director, at our St. Louis address. If we can be of further assistance, please do not hesi tate to 1st ms know. Sincerely, EPWiJu Enclosures Elmer P. Wheeler Manager, Environmental Health MONS 088373