Explore Parafilm® M Sealing Films
Parafilm® M is an innovative, colorless moisture-proof film engineered for versatility in laboratory settings. This semi-transparent, flexible thermoplastic film is designed to mold seamlessly to various surfaces, providing superior protection and sealing capabilities.
Key Features:
- Creates a robust moisture-barrier that securely seals glassware, preventing release even amidst off-gassing.
- Formulated to be non-toxic and free from plasticizers, primarily composed of durable polyolefins and paraffin waxes.
- Exhibits excellent resistance against acids, alkalis, and certain organic solvents; recommended caution against acetone, diethyl ether, and tetrachloride.
- Minimizes the chance of tampering with an odorless, colorless, and semi-transparent covering.
- Effectively prevents moisture and volume loss through its unique material composition and tight sealing capabilities.
- Features a highly flexible and self-sealing design that clings securely around irregular shapes and surfaces.
- Offers exceptional stretchability, expanding over 200% of its original length.
- Resistant for up to 48 hours against various polar substances, including saline solutions and inorganic acids.
Permeability Specifications:
- 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%: Permenant dark brown coloration after 18 hours, no other apparent effect.
- 0.1%: Same as above, slightly less discoloration.
Iodine solution (0.1N)
- No noticeable effect aside from staining brown after 18 hours.
Ethyl Alcohol (95%)
- No significant effects except minor whitening observed after 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%)
- Not recommended for contact with chlorinated, non-polar aliphatic, and aromatic solvents.
- Film becomes soft and sticky at temperatures between 130°F and 150°F (68°C).
Parafilm® is a registered trademark, setting the standard in sealing solutions for laboratory and medical applications.
