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Isobutane (16)CAS RN:75-28-5
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MidPoint Chemicals CompanyTelephone:630 758 0400
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Tauber Oil CompanyTelephone:+1 (713) 869-8700
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Valero CorporateTelephone:(210)345-2000 ;(800)531-7911
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El Paso CorporationTelephone:713-420-2600
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Diversified CPC International, Inc.Telephone:815-423-5991
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Joint Oceanographic Institutions, Inc.Telephone:202-232-3900