(Substance [CAS No.]Documentation date: Helium [7440-59-7
(TWA: See Appendix F: Minimal Oxygen Content (D
(STEL: See Appendix F: Minimal Oxygen Content (D
(Notations: See Appendix F: Minimal Oxygen Content (D
MW: 4.00
TLV® Basis: Asphyxia
[align=right]Substance، نام علمی ماده شیمیایی: هلیم
WA، آستانه مجاز مواجهه شغلی: [url=http://www.occupationalhealth.ir/showthread.php?
