Document VJJ14yLwRj3xZv4NgjEBKv8jq

t MONSANTO INDUSTRIAL CHEMICALS CO. 800 N. iinjsf.'is 2aiv**o St. Lou>$, Mmouri 63)53 Phon. (314) G34-IOOO ' ... /''* '**.' ' March, 1972 Gentlemen: In August, 1971 you were informed that the Therminol^ FR aeries heat transfer fluids, namely FR Lo-Temp, FR-0 ar.d FR-1 had boon discontinued for all new systems. . We did continue to supply the Thermir.ol PR series heat transfer fluids into existing systems as makeup whore we were assured that its use was in a non-foou related system. In a continuing effort to prevent any PC3 from entering the en vironment, last Pacember we notified our U.S. customers,..that the sale of all ?CB-ccntalnir.g fherminols, namely Therminol^ PR Lc7r.;p, Fa-0 and FR-1, was being discontinued. We are currently extending discontinuation world-wide, h'e are suggesting that those remaining 'systems be drained comnletolv, flushed to remove PC;5, and. refilled with ncn-*fCo fluids. Tne most lixo'iy Monsanto ctu-.dToacea wsufcT'ce `fnermir.oi o5 ana Thermir.ol 66. \i0 are also asking that all FC3 materials be returned to us for disposal. In moat ca3e3 :hi3 conversion can be accomplished with very li:tlc change to the system. It i3 important, however, to realise th:t the r.ew fluids are not fire resistant and that protective devli.es may be necessary for these fluids Just the same as for other com bustible fluids.. Suggestions r*og"-rding fire protection and other conversion details arc included in the attached "Thermir.ol Conver sion" bulletin. We hope this will be i eipful to you in answer..r.y, any questions you receive a3 co-suppliers in Therminol PR syss.. We again want to ask your cooperation In this period of system con versions and appreciate your continued use and recommendation of the ncn-FC3 cor.raining Therminols, namely bb, bo, 77 and 56. .Should you have questions please contact your local Monsanto re presentative or me at this location. .. Very truly yours. cs line losuron: . Conversion Eullotin * -. ...., 1. limited J. J. Roder product huporvinor Heat Trans for1 Fluids 0755176