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ocky Mounl ein Arsenal Medical Monitoring Program <br />DIISOPROPYL ~IETHYLPHOSPHONATE <br />(CrH170~P) CAS #1445-75-6 (Semi-Volatile Organic Compound) <br />Synonyms include: D1MP, Diisopropyl methanephosphonate <br />Phosphonic acid, methyl-, bis(1-methylethyl) ester <br />Phosphonic acid, and diisopropyl ester <br />SOURCF/USE <br />Diisopropyl methyphosphonate (DIMP) does not occur naturally and is created as a by-product of the <br />production of the chemical agent Sarin. There is no specific use for DIMP and human exposue is <br />confined to production of satin and exposure to DIMP from sites where Sarin may have been created, <br />used, or disposed. DIMP tends to adsorb on soil particulates and may be one of the more <br />toxicologically important air contaminants found during remediation projects. <br />ROUTES OF EXPOSURE <br />DIMP exposure can occur via many potential pathways. These pathways include oral, dermal and <br />pulmonary routes of exposure. The risk of any acute DIMP exposure off post due to the RMA <br />remediation activity is very small because it is a contaminant of concern only in groundwater. <br />APPLICABLE STANDARDS AND LIMITS <br />ATSDR acute MRL Not Available <br />OSHA PEL Not Available <br />Odor reco 'tion No Odor <br />Colorado oundwater standard 8 <br />EPA federal drinking water standard 600 • g/L <br />RMA acute fence line criteria* Not Available <br />RMA chronic fence line criteria* Not Available <br />')/-~~F/en~ce~li~ne criteria were not calculated for this constituent as it is not a concern From soil exposure. <br />/ "'~.~,t~~~~ <br />- rya- ~~aX <br />Acute/Chronic Toxicity -Diisopropyl methylphosphonate 237 <br />