Description_x000D_ General description_x000D_ PARAFILM stretches up to 200% and clings even around irregular shapes and surfaces. The sealing film is free of plasticizers and consists primarily of polyolefins and paraffin waxes. PARAFILM M is resistant up to 48 hours against many polar substances, eg saline solutions, inorganic acids and alkaline solutions._x000D_ 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_x000D_ Reduce the risk of tampered data with a covering that is odorless, colorless and semi-transparent_x000D_ Prevents moisture and volume loss due to material composition and tight seal_x000D_ Flexible and self-sealing material allows it to cling around irregular shapes and surfaces_x000D_ Stretches more than 200% of original length_x000D_ Resistant up to 48 hours against many polar substances such as saline solutions, inorganic acids and alkaline solutions_x000D_ Permeability_x000D_ Oxygen: (ASTM 1927-98) 150 cc/m² d at 23°C and 50% RH_x000D_ Carbon Dioxide: (Modulated IR Method) 1200 cc/m² d at 23°C and 0% RH_x000D_ Water Vapor: (ASTM F1249-01)_x000D_ Flat: 1 g/m² d at 38°C and 90% RH_x000D_ Creased: 1 g/m² d at 38°C and 90% RH_x000D_ Effects of Common Reagents_x000D_ Potassium Permanganate_x000D_ 5%: No apparent effect except permanent dark brown coloration in 18 hours_x000D_ 0.1%: Same as 5% except slightly less color_x000D_ Iodine solution (0.1N)_x000D_ No effect except staining brown in 18 hours_x000D_ Ethyl Alcohol (95%)_x000D_ No apparent effect except some face whitening in 24 hours_x000D_ No apparent effect in 24 hours:_x000D_ Hydrochloric Acid conc. (12N) dil. (5N)_x000D_ Sulphuric Acid conc. (36N) dil. (5N)_x000D_ Nitric Acid conc. (16N) dil. (5N)_x000D_ Sodium Hydroxide conc. (22%)_x000D_ Ammonium Hydroxide conc. (28% NH3)_x000D_ Salt (NaCl) solution (20%)_x000D_ Isopropyl Alcohol (99%)_x000D_ Not recommended for use with chlorinated, non-polar aliphatic and aromatic solvents_x000D_ Film becomes soft and sticky at about 130° to 150°F (54° to 66°C)_x000D_ Legal Information_x000D_ Parafilm is a registered trademark of Bemis Company, Inc.