Laboratory Parafilm

Specification of Laboratory Parafilm:
Size: 4 inch x 125 Feet
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)