Parafilm

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Parafilm.

Parafilm or Parafilm M(R) is a plastic paraffin film with a paper backing, primarily used in laboratories for sealing bottles, flasks and tubes.

It is produced by Bemis NA.

Properties

Parrafin is a ductile, malleable, waterproof, odorless, translucent and cohesive thermoplastic. If properly handled, Parafilm can stretch up to 8 times its normal length, though it's not always necessary to stretch it too much, as it will get thinner and may easily break. It is also flammable.

Parafilm is easily dissolved by most solvents and will slowly break down in air and light. Halogens will also destroy it.

Availability

Parafilm can be purchesed from Bemis. It can also be purchased from other suppliers as well as from eBay and Amazon. Prices vary depending on seller.

Projects

  • Seal bottles containing air or water sensitive materials

Handling

Safety

Parafilm is relative inert and it's non-toxic. It can be safely handled without gloves.

Being a thermoplastic, Parafilm will break down in an autoclave.

Storage

Paraffin should be kept away from light and away from corrosive solvents.

Disposal

Waste Parafilm can be safely dumped in trash.

References

Relevant Sciencemadness threads