Specific Guidelines

The compressed gases and cryogenic liquids presented on the following pages are organized in product categories having similar health hazards and storage requirements. These categories are as follows:

• Nonflammable, Non-corrosive, Low Toxicity (Table 1)
• Flammable, Non-corrosive, Low Toxicity (Table 2)
• Flammable, Corrosive, and/or Toxic (Table 3)
• Toxic and/or Corrosive, Nonflammable (Table 4)
• Spontaneously Flammable(Table 5)
• Toxic (Table 6)

Table 1: Nonflammable, Non-corrosive, Low Toxicity Gases

Store these products in well-ventilated areas or in covered outdoors areas, keeping them off the ground and away from radiant heat sources. Cylinder temperatures should not exceed 125^°F (52^°C).

Note: Nonflammable, Non-corrosive, Low Toxicity products listed in Table 1 can be safely stored together with Toxic and/or Corrosive, Nonflammable products listed in Table 4.

• Air
• Argon
• Banana Gas 32
• Carbon Dioxide
• Clinical Blood Gas Mixtures
• P-5 Electron Capture Mixture
• 8.5% Hydrogen/Helium
• Halocarbon 14
• Halocarbon 22
• Halocarbon 23
• Halocarbon 116
• Halocarbon 218
• Halocarbon 134A
• Helium
• Krypton
• Neon
• Nitrogen
• Nitrous Oxide
• Oxygen
• Sulfur Hexafluoride
• Xenon

Table 2: Flammable, Non-corrosive, Low Toxicity Gases

Store these products in well-ventilated areas equipped with electrical equipment in accordance with Article 500 of the National Electrical Code. These products may also be stored in covered outdoor areas, but keep them off the ground and away from radiant heat sources. Keep all ignition sources and combustible materials out of the storage area. Cylinder temperature should not exceed 125^°F (52^°C).

Note: Flammable, Non-corrosive, Low Toxicity products listed in Table 2 can be safely stored together with Flammable, Corrosive, and/or Toxic products listed in Table 3.

• Acetylene
• Butane
• Deuterium
• Ethane
• Ethylene
• Hexane
• 1-Hexene
• Hydrogen
• Isobutane
• Isobutylene
• Methane
• Propane
• Propylene
• Toluene
• Xylenes (o-,m-,p-)

Table 3: Flammable, Corrosive, And/Or Toxic Gases

Store these products in well-ventilated areas equipped with electrical equipment in accordance with Article 500 of the National Electrical Code. These products may also be stored in covered outdoor areas, but keep them off the ground and away from radiant heat sources. Keep all ignition sources and combustible materials out of the storage area. Cylinder temperature should not exceed 125^°F (52^°C).

Note: Flammable, Corrosive, and/or Toxic products listed in Table 3 can be safely stored together with Flammable, Non-corrosive, Low Toxicity products listed in Table 2.

• 1,3-Butadiene
• Carbon Monoxide
• Carboxide, 10% Ethylene
• Oxide – 90% Carbon
• Dioxide Mixture
• Dichlorosilane
• Dimethylamine
• Ethyl Chloride
• Ethylene Oxide
• Hydrogen Sulfide
• Methyl Bromide
• Methyl Chloride
• Monomethylamine
• TEOS
• Trichlorosilane
• Trimethylamine

Table 4: Toxic And/Or Corrosive, Nonflammable Gases

Store these products in well-ventilated areas or in covered outdoor areas, but keep them off the ground and away from radiant heat sources. Cylinder temperature should not exceed 125^°F (52^°C).

Note: Nonflammable, Non-corrosive, Low Toxicity products listed in Table 1 can be safely stored together with Toxic and/or Corrosive, Nonflammable products listed in Table 4.

• Ammonia
• Boron Trichloride
• Boron Trifluoride
• Boron11 Trifluoride
• Chlorine
• Hydrogen Bromide
• Hydrogen Chloride
• Sulfur Dioxide
• Hydrogen Fluoride
• Nitrogen Trifluoride
• Phosphorous
• Pentafluoride
• Silicon Tetrachloride

Table 5: Spontaneously Flammable Gases

Store these products in well-ventilated areas or in covered outdoor areas, but keep it off the ground and away from radiant heat sources. Keep combustible materials out of the storage area. Cylinder temperatures should not exceed 125^°F (52^°C).

Warning: Do not store Spontaneously Flammable products with products in any other hazard category.

• Disilane
• Silane
• Trimethylboron

Table 6: Toxic Gases

These products are very toxic. The slightest exposure to these products can kill. Preferably, store these toxic gases outdoors in a fenced-in area that has been locked and posted. This area must be covered with the cylinders kept off the ground and away from radiant heat sources. If stored indoors, toxic gas cylinders must be kept in well-ventilated areas. Cylinder temperatures should not exceed 125^°F (52^°C).

In addition to being toxic, arsine, diborane, and phosphine are also flammable. The storage area for flammable toxic gases should have electrical equipment conforming to Article 500 of the National Electrical Code. Space all ignition sources and combustible materials out of storage areas.

Warning: Do not store Toxic products with products in any other hazard category.

• Arsine
• Chlorine Trifluoride
• Diborane
• Diethyltelluride
• Hydrogen Mixtures
• Germane
• Germanium Tetraflouride
• Hydrogen Selenide
• Nitric Oxide
• Nitrogen Dioxide
• Phosphine
• Tungsten Hexafluoride