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!CAS Number !! Chemical Constituent !! Commercial use <ref name="hpd.nlm">{{cite web |url=http://hpd.nlm.nih.gov/cgi-bin/household/search?tbl=TblChemicals&queryx=7647-01-0 |title=Household Products Database |work=Health and Safety Information on Household Products |publisher=U.S. Department of Health and Human Services |date=August 2015 |accessdate=11 November 2015 |author=NLM }}</ref>
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|9003-05-8 ||[[polyacrylamide|poly(2-prop-enamide)/
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|7647-01-0 ||[[Hydrochloric acid]]|| Pre-fracturing to clean perforations, water pH adjuster
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