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Helium (15)CAS RN:71086-78-7;7440-59-7
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International Gases and Chemicals Ltd.Telephone:+44-0-1782-565556
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Air LiquideTelephone:
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SIAD S.p.A.Telephone:+39035.328.326,+39035.328.111
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Euriso-topTelephone:33-1-69-41-95-96
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Birlesik Oksijen Sanayi ASTelephone:90-262-7510100
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Air Products S.A.Telephone:33 -1-44.92.51.00
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Air Liquide Italia S.r.l.Telephone:39-02-40261
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Hydro Chemicals SwedenTelephone:47 24 15 70 00
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Societa Italiana Acetilene & Derivati S.p.A.Telephone:39-035-328111
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Messer France S.ATelephone:01-40803300