Few liquified gases:

A few liquified gases need special precautions.  For instance, while liquid oxygen is handled, whole combustible materials, especially oil or gases, should be kept away.  Open flames or Smoking should never be permitted while liquid oxygen is stored or handled.  The NO SMOKING signs should be posted conspicuously within such areas.

Liquid oxygen, or oxygen-rich air atmospheres that should not come in contact along with organic materials or flammable substances. A few organic materials (oil, kerosene, asphalt, cloth, or dirt holding oil or grease) react violently along with oxygen, and might be ignited through a hot spark.  Liquid oxygen might form mixtures which are shock sensitive along with fuels, oils, or grease.  If liquid oxygen spills on asphalt or on another surface contaminated along with combustibles (for instance, oil-soaked concrete or gravel), no one should walk on or no equipment should pass over an area for at least 30 minutes after all fog or frost has disappeared.

Some clothing that has been splashed or soaked along with liquid oxygen, or exposed to a high gaseous-oxygen atmosphere that should be changed instantly.  A contaminated system should be aired for at least an hour so in which they are totally free of excess oxygen.  Staff exposed to high-oxygen atmospheres should leave the area and prevent all sources of ignition until the clothing or the exposed area has been fully ventilated.  Clothing saturated along with oxygen will burn vigorously and is readily ignitable.