Parafilm PM 996 M is a versatile, flexible, and highly adhesive laboratory film commonly used in scientific and industrial settings. It is widely recognized for its ability to seal containers and protect samples from contamination, evaporation, and exposure to the environment.Parafilm PM 996 4 Inch x 125 FT. (1 Roll), USAA flexible sealing film comprising a proprietary blend of waxes and polyolefins on a paper release linerFeatures of the Multipurpose Laboratory Film: Parafilm “M” is highly insensitive to water, moisture loss, and moisture absorption, yet is permeable to oxygen and carbon dioxide.Parafilm “M” stretches more than 350% of its original length and is self-sealing, allowing it to cling around irregular shapes and surfaces.These unique properties make it ideal for protecting the contents of test tubes, flasks, beakers, and Petri dishes, as well as an overwrap to further secure stoppers, lids, and caps.Technical DataProperties Values Units Test MethodThickness 127 ?m ASTM D645Density 0.922 g/cm3 Amcor InternalElongation at Break >350 % ASTM D882Water Vapor Transmission Rate 1 g/(m2? d) @ 38°C; 90% RH ASTM F1249Oxygen Transmission Rate 300 cm3/(m2? d) @ 23°C; 0% RH ASTM D3985Carbon Dioxide Transmission Rate 1200 cm3/(m2? d) @ 23°C; 0% RH ASTM F2476Softening Point 54°C Amcor InternalMelting Point 100°C Amcor InternalEffects of Common ReagentsParafilm M is resistant to many polar substances for up to 48 hours. After this period, some brittleness may occur. It is not recommended for use with chlorinated or non-polar aliphatic or aromatic solvents.Reagent Concentration 24 h exposure at 23°CAcids Hydrochloric acid 12 N No apparent effectSulfuric acid 36 N No apparent effectNitric acid 16 N Resistant (some discoloration)Alkalis Sodium hydroxide 1.8 N; 22 wt-% NaOH No apparent effectAmmonium hydroxide 14.5 N; 28 wt-% NH3 No apparent effectOrganicsMethanol: No apparent effectEthanol 95 % (v/v) No apparent effectIsopropanol 99 % (v/v) No apparent effectOtherSaline solution 20 wt% NaCl No apparent effectPotassium permanganate 5 wt% Resistant (some discoloration)Iodine solution 0.1 N (KI I2) Resistant (some discoloration)
