Document oeVXveG51nRNLwKpwwxXyDZY8

MILLHAVEN FIBRES LIMITED A Subsidiary of CANADIAN INDUSTRIES LIMITED P.O. BAG 2800. KINGSTON, ONTARIO Technical Department, Kingston, Ontario. October 17, 1969. . /yirrfv- r^-iV-Engr-, - Sales Representative, Organic Chemicals, Monsanto Canada Ltd., 175 Rexdale Blvd., Rexdale, Ontario. Dear Sir: A member of our Department has been off work with a major irritation to his eyes. One suspected cause is Therminoi FR-3 as he has been working in - an area where we use FR-3 as a heat transfer fluid.. . .. We have noted in your booklet on Therminoi that the "Threshold limit value" which cannot be safely exceeded is 0.5 - 1.0 milligrams of Therminoi FR vapour per cubic meter of air in the workroom. Could you suggest to us, therefore, a procedure for measuring the concentration of Therminoi FR vapour in a workroom? Could you please advise us also of the type of irritation to be expected if the above limit is exceeded? appreciated. Any more detailed information you have in this regard will be Yours truly, ... ' MILLHAVEN FIBRES LIMITED HAFA/ja . H. A. F. Allison Services Assistant Process and Product Research Section DSW 343567 STLCOPCB4096625