Nontoxic flammable products

Nontoxic nonflammable products may be safely vented to reduce the cylinder pressure to atmospheric pressure prior to recycling. Nontoxic flammable products should be fully expended through normal use before disposal. Unused flammable substances may be considered hazardous wastes under the U.S. Resource Conservation and Recovery Act (RCRA). The supplier should be contacted to obtain the proper procedure for rendering the cylinder recyclable. Only knowledgeable persons familiar with all applicable federal, state, and local laws and regulations should perform the actual disposal procedure. 

Preservatives which prevent infection of the skin and decomposition of the product. An ideal preservative is nontoxic to humans, nonirritating, and nonsensitizing, however, they may include flammable alcohols or mercury-based anti-infectives for the eye areas. 

Nitrogen, air, carbon dioxide, a mixture of air and helium, are examples of gaseous foaming agents used in the production of polymer foams. Nitrogen and air are preferred since they are inert, nontoxic, non-flammable and have a low diffusivity with respect to the majority of polymers. An air/helium mixture permits an easy control of the foam density. 

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