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A packaging gas is used to pack sensitive materials such as food into a modified atmosphere environment. The gas used is usually inert, or of a nature that protects the integrity of the packaged goods, inhibiting unwanted chemical reactions such as food spoilage or oxidation. Some may also serve as a propellant for aerosol sprays like cans of whipped cream. For packaging food, the use of various gases is approved by regulatory organisations. Their E numbers are included in the following lists in parentheses: ==Inert gases== These gas types do not effect a chemical change to the substance which they protect. * argon (E938), used for canned products * helium (E939), used for canned products * nitrogen (E941), also propellant * carbon dioxide (E290), also propellant 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Packaging gas」の詳細全文を読む スポンサード リンク
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