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No matter whether you wish to seal beakers, Erlenmeyer flasks, weighing bottles or graduated cylinders, the highly elastic and stretchable Parafilm® M laboratory film fits the opening of any vessel. It saves specimens from contamination or evaporating. Furthermore, it prevents fallen over flasks from spilling. Parafilm® M stretches up to 200 % of its original size and clings even around irregular shapes and surfaces.
If Parafilm® M comes into contact with foods, the relevant regulations are to be observed. Parafilm® M complies with to the provisions of the US FDA Food and Drug Administration when used below 55 °C and observance of GMP (Good Manufacturing Practice).
| Physical properties: | Chemical resistance: |
|---|---|
| Toxicity: not toxic Melting point: 60 °C Flash point: 301 °C Temperature range (continuous use): - 45 °C to + 50 °C |
Parafilm® M is resistant up to 48 hours against many polar substances, e. g. saline solutions, inorganic acids and alkaline solutions. After that period embrittlement may occur. |
| Stretchability: 200 % Elongation at tear: 300 % |
Effects of 48 hours of exposure at 23 °C |
| Gas permeability in 24 hours at 23 °C with 50 % relative humidity: Oxygen O2 ≤ 350 cm3/m2 |
Acids: Hydrochloric acid 36.5 %: resistant Sulphuric acid 98 %: resistant Nitric acid 95 %: resistant* |
| Nitrogen N2: ≤ 105 cm3/m2 Carbon Dioxide CO2: ≤ 1100 cm3/m2 |
Alkaline solutions: Sodium hydroxide 22 %: resistant Ammonia 28 %: resistant |
| Water vapour permeability in 24 hours at 37 °C and 90 % relative humidity: 0.8 g/m2 |
Saline solutions: Sodium chloride 20 %: resistant Potassium permanganate 5 %: resistant* Iodine solution 0.1 ml/l: resistant* |
| 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 %. |
Organic solvents: Methanol: resistant Ethanol: resistant Isopropanol: resistant Diethylether: not resistant Chloroform: not resistant Carbon tetrachloride: not resistant Benzene: not resistant Toluene: not resistant |
| Cat. No. | Length | Width | Packaging | Unit |
|---|---|---|---|---|
| 7403810 | 38 m | 10 cm | Dispenser | 12 |
| 7407505 | 75 m | 5 cm | Dispenser | 24 |
| 7407510 | 75 m | 10 cm | Dispenser | 12 |