Sealing Film, 4" x 125', Parafilm®, Natural, 1 roll

Sealing Film, 4" x 125', Parafilm®, Natural. 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 degrees C and 50% RH Carbon Dioxide: (Modulated IR Method) 1200 cc/m2 d at 23 degrees C and 0% RH Water Vapor: (ASTM F1249-01) Flat: 1 g/m2 d at 38 degrees C and 90% RH Creased: 1 g/m2 d at 38 degrees 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) Sulfuric 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 degrees F to 150 degrees F (68 degrees C) Parafilm is a registered trademark of Bemis Company, Inc. Made in the United States.