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Hazard Class 2: Compressed Gases


Any material or mixture having in the container an absolute pressure exceeding 40 psi (pounds per square inch) at 70°F, or regardless of the pressure at 70°F, having an absolute pressure exceeding 140 psi at 130°F; or any flammable material having a vapor pressure exceeding 40 psi at 100°F."

Subsets of Class 2 are:

  • 2.1 Flammable Gas – Hydrogen Compressed, Ethylene, Butylene, Acetylene, etc.
  • 2.2 Non-Flammable Gas – Oxygen Compressed, Nitrogen Compressed, etc.
  • 2.3 Poisonous Gas – Phosgene, Sulfur Tetrafluoride, Insecticide Gasses, etc.

Shipping Options

  • Vendor - Airgas is the preferred supplier of compressed gasses at Cornell University.  They can deliver and pickup a wide assortment of compressed gasses, they also assist with customers returning cylinders back to certain manufacture's. Airgas can assist with other shipments of compressed gasses on a case by case basis (Airgas).

  • Become Trained - All shipments of Class 2 material require the shipper to be trained and certified.  EHS certifies all shippers at Cornell.  All training whether on-site or by an outside EHS vendor, EHS must review training and issue a certificate of training.
  • Contact EHS - EHS has employees trained in the shipping of hazardous material and can ship your material for you (EHS 607-255-8200).