Parafilm® M Sealing Film 500 mm x 16 m, Natural

The Parafilm® M Sealing Film is a colorless, moisture-proof film that molds to the surface. It is a semi-transparent, flexible, thermoplastic film with two-way stretch. It is resistant up to 48 hours against many polar substances and prevents moisture and volume loss due to the material composition and tight seal. The sealing film stretches more than 200% of its original length, allowing it to cling to around irregular shapes and surfaces. • 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) 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) o Flat: 1 g/m² d at 38°C and 90% RH o 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%)