Document 1gg82EOrm1pmV7G6r5yv7Xq5o

______________ ___ .nteroffice Communication To Keith Fogg From Thomas G. Grumbles Date October 11, 1982 Subject Degreasing Solvents Recommendation (conoco) Perchloroethylene and 1-1-1 Trichloroethane are the most commonly used chlorinated degreasing solvents. Based on physical properties and toxicity 1-1-1 Trichloroethane (methyl chloroform) would be the solvent of choice. This solvent is sold under a variety of tradenames and should be readily available from local vendors. Some basic properties of both are listed below. Please call if you have further questions. 'f'homas G. Grumbles TGG/ch Perchloroethylene ^ ACGIHTLV 50 ppm (skin hazard) non-flammable odor threshhold ca.5 ppm high systemic toxicity Trichloroethane (Methyl Chloroform) ACGIHTLV 350 ppm (no skin notation) non-flammable (will burn only with excess of oxygen or strong ignition source) low systemic toxicity CCR 000000931