Merck, P7543-1EA, PARAFILM® M

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. 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 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° to 150°F (54° to 66°C)