Moisture-proof film molds to surface Parafilm® M is a semi-transparent, flexible, thermoplastic film with two-way stretch.
Non-toxic and free from plasticizers, primarily composed of polyolefins and paraffin waxes offering good resistance against acids, alkalis and some organic solvents—use not recommended with acetone, diethyl ether or tetrachloride
Protect the integrity of research applications with a tight moisture-barrier that holds a strong seal and doesn’t release from glassware, despite off-gassing
Reduce the risk of tampered data with a covering that is odorless, colorless and semi-transparent
Prevents moisture and volume loss due to material composition and tight seal
Flexible and self-sealing material allows it to cling around irregular shapes and surfaces
Stretches more than 200% of original length
Resistant up to 48 hours against many polar substances such as saline solutions, inorganic acids and alkaline solutions
Two color options available in 2” rolls (natural and purple) for color coding purposes
Disposable
Applications Efficient and cost-effective covering for:
Test tubes
Beakers
Vials
Petri dishes
Flasks
Various other instruments and objects with irregular surfaces
Overwrap to further secure stoppers, lids and caps
Shelf or tray liner to prevent slipping of bottles or instruments
Permeability
Oxygen: (ASTM 1927-98) 150 cc/m² d at 23°C and 50% RH
Carbon Dioxide: (Modulated IR Method) 1200 cc/m² d at 23°C and 0% RH
Water Vapor: (ASTM F1249-01)
Flat: 1 g/m² d at 38°C and 90% RH
Creased: 1 g/m² d at 38°C and 90% RH
Effects of Common Reagents
Potassium Permanganate
5%: No apparent effect except permanent dark brown coloration in 18 hours
0.1%: Same as 5% except slightly less color
Iodine solution (0.1N)
No effect except staining brown in 18 hours
Ethyl Alcohol (95%)
No apparent effect except some face whitening in 24 hours
No apparent effect in 24 hours:
Hydrochloric Acid conc. (12N)dil. (5n)
Sulphuric Acid conc. (36n) dil. (5n)
Nitric Acid conc. (16n) dil. (5n)
Sodium Hydroxide conc. (22%)
Ammonium Hydroxide conc. (28% NH3)
Salt (NACL) solution (20%)
Isopropyl Alcohol (99%)
Not recommended for use with chlorinated, non-polar aliphatic and aromatic solvents
Film becomes soft and sticky at about 130°F to 150°F (68°C)