Parafilm M® Sealing Film
Resistance to common laboratory liquids
Hydrochloric Acid
Concentrated (12N) No apparent effect in 24 hours
Dilute (6N) No apparent effect in 24 hours
Sulphuric Acid
Concentrated (36N) No apparent effect in 24 hours
Dilute (6N) No apparent effect in 24 hours
Fuming No Effect expected short term
Nitric Acid
Concentrated (16N) No apparent effect in 24 hours
Dilute (6N) No apparent effect in 24 hours
Fuming No Effect expected short term
Sodium Hydroxide
Concentrated 22% No apparent effect in 24 hours
Ammonium Hydroxide
Concentrated (28% NH3)
Potassium Permanganate
5% No apparent effect except permanent black
brown coloration in 18 hours
0.1% Same as above except slightly less color
Iodine Solution 0.1 N No effect except staining brown in 18 hours
Salt (NaCl) solution 20% No apparent effect in 24 hours
Carbon tetrachloride Will start to dissolve Parafilm M on contact
Ethyl alcohol, 95% No apparent effect except some face whitening
in 24 hours
Isopropyl alcohol, 99% No apparent effect in 24 hours
Acetonitrile, 99+% No apparent effect after 24 hours
Acetone:
Parafilm M is not stable in or around acetone as it will swell and to some
degree lose its dimensional integrity. But even though acetone will not
dissolve Parafilm M, after 24 hours of immersion in acetone, there is
extracted about 1.3% by weight of the components of Parafilm M.
Surprisingly, even after this about of material is extracted, Parafilm M
still remains at least to some degree, functional as a covering material.
However, our best recommendation is to not use Parafilm M in the presence of
acetone.
Hydrofluoric acid:
We would urge caution with the use of Parafilm M® in the presence of HF,
liquid or vapor. We do not have any specific information on how Parafilm M®
will respond to HF vapor. But we would expect that it would provide some
level of protection to rubber and other elastomeric seals, since it would be
less reactive than the seals they would be protecting. However having said
that, our concern would be that at the low level of 1 ppm there may be some
solubility in the Parafilm since it is fairly amorphous.
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Sunday March 21, 2010
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