Product Description
No matter whether you wish to seal beakers, Erlenmeyer flasks, weighing bottles or graduated cylinders, the highly elastic and stretchable Parafilm laboratory film fits the opening of any vessel. Its saves specimens from contamination or evaporating. Furthermore, it prevents fallen over flasks from spilling. Parafilm stretches up to 200% of its original size and clings even around irregular shapes and surfaces.
If Parafilm comes into contact with foods, the relevant regulations are to be observed. Parafilm complies with the provisions of the US FDA Food and Drug Administration when used below 55°C and observance of GMP (Good Manufacturing Practice).
Physical PropertiesChemical Resistance
- Toxicity: not toxic
- Melting point: 60 °C
- Flash point: 301 °C
- Temperature range (continuous use): – 45 °C to + 50 °C
- Stretchability: 200 %
- Elongation at tear: 300 %
- Gas permeability in 24 hours at 23 °C with 50 % relative humidity:
- Oxygen O2 ≤ 350 cm3/m2
- Nitrogen N2: ≤ 105 cm3/m2
- Carbon Dioxide CO2: ≤ 1100 cm3/m2
- Water vapour permeability in 24 hours at 37 °C and 90 % relative humidity: 0.8 g/m2
- Storage: Parafilm® M can be stored for at least 3 years at a temperature between 7 °C and 32 °C and relative humidity of 50 %.
- Parafilm® M is resistant up to 48 hours against many polar substances, e. g. saline solutions, inorganic acids and alkaline solutions. After that period it may become brittle.
- Effects of 48 hours of exposure at 23 °C
- Acids:
- Hydrochloric acid 36.5 %: resistant
- Sulphuric acid 98 %: resistant
- Nitric acid 95 %: resistant*
- Alkaline solutions:
- Sodium hydroxide 22 %: resistant
- Ammonia 28 %: resistant
- Saline solutions:
- Sodium chloride 20 %: resistant
- Potassium permanganate 5 %: resistant*
- Iodine solution 0.1 ml/l: resistant*
- Organic solvents:
- Methanol: resistant
- Ethanol: resistant
- Isopropanol: resistant
- Diethylether: not resistant
- Chloroform: not resistant
- Carbon tetrachloride: not resistant
- Benzene: not resistant
- Toluene: not resistant
* Brown discoloration
