Parafilm M^® Sealing Film

Resistance to common laboratory liquids

Spanish

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.