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), USA

• 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.

• Properties Values Units Test Method
• Thickness 127 ?m ASTM D645
• Density 0.922 g/cm3 Amcor Internal
• Elongation at Break >350 % ASTM D882
• Water Vapor Transmission Rate 1 g/(m2? d) @ 38°C; 90% RH ASTM F1249
• Oxygen Transmission Rate 300 cm3/(m2? d) @ 23°C; 0% RH ASTM D3985
• Carbon Dioxide Transmission Rate 1200 cm3/(m2? d) @ 23°C; 0% RH ASTM F2476
• Softening Point 54°C Amcor Internal
• Melting Point 100°C Amcor Internal
• Effects of Common Reagents
• Parafilm 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°C
• Acids Hydrochloric acid 12 N No apparent effect
• Sulfuric acid 36 N No apparent effect
• Nitric acid 16 N Resistant (some discoloration)
• Alkalis Sodium hydroxide 1.8 N; 22 wt-% NaOH No apparent effect
• Ammonium hydroxide 14.5 N; 28 wt-% NH3 No apparent effect

• Methanol: No apparent effect
• Ethanol 95 % (v/v) No apparent effect
• Isopropanol 99 % (v/v) No apparent effect

• Saline solution 20 wt% NaCl No apparent effect
• Potassium permanganate 5 wt% Resistant (some discoloration)
• Iodine solution 0.1 N (KI+I2) Resistant (some discoloration)