Document 6BbRNLRrj8BMmzBwVVE14B0Lo

TO: Distribution FROM: DATE: SUBJ: T. G. Grumbles June 22, 1990 CUSTOMER LETTER TO DISTRIBUTE REVISED BUTADIENE MSDS VIS1A The revised MSDS for BD needs to be sent to all Butadiene customers. Attached is the cover letter I am proposing to use for the distribution. Please provide any comments you have on the letter to me by July 9. T. G. Grumbles dlj Distribution: D. Penny-Austin, W. L. McClain,, P. Quinlan, J. A. Hall QEQ-308987 Date Butadiene Customer Dear : Vista has made revisions to our Butadine Concentrate Material Safety Data Sheet. This letter is to provide you with a copy of the revised MSDS and to describe the change. The change made is in Section 5 - Health Hazard Information Toxicity Data. Vista had previously indicated the results of a rat inhalation study resulting in mammary any testicular tumors. Vista has become aware of additional toxicological and epidemiological data that indicates other potential sites for a carcinogenic effects. This information is now summarized as well in the toxicity data section. Please call Dr. David Penney at 512-588-2468 if you have questions regarding this information. Sincerely, T. C. Grumbles Manager, Environmental Affairs UEV-308988