Table 3.21. Chemical Resistance of Filled PTFE Compound

Chemical Filler
Carbon/ Graphite Glass Bronze
Acetaldehyde A A A
Axetone A A A
Aluminium sluphate A A B
Ammonium chloride A A C
Ammonium hyroxide A B C
Aniline A A C
Benzene A A A
Broic acid A A A
Brine A A A
Bromine (anhydrous) C B C
Carbon disulphide A A A
Chloroacetic acid A A B
Chlorobenzene A A A
Chloroform A A A
Chromic acid B B C
Critic acid A A A
Diethyl ether A A A
Ethylene glycol A A A
Fatty acid A A A
Ferric chloride A A C
Ferric sulphate A A C
Fluorosilicic acid B C C
Fromic acid A A A
Freon*(liquid) A A A
Hydroboric acid A B C
Hydrochloric acid A B C
Hydrocyanic acid A B C
Hydrofluroic acid A C C
Hydrogen sulphide (solution) A C C
Lead acetate A A C
Maleic acid A A B
Mercury salts A A C
Molasses A A B
Naphtha A A B
Naphthalene A A B
Nickle Salts A A A
Nitric acid (0-50%) C B C
Nitro benzene A A A
Phenol A B A
Phosphoric acid A A C
Phthalic acid A A A
Picric acid A A A
Pyridine A A C
Salicyclic acid A A B
Silver nitrate A A C
Sodium Carbonate A A A
Sodium hydroxide A B A
Sodium nitrite A A A
Sodium peroxide B A C
Sodium silicate A C A
Sodium sulphide A A C
Starch A A A
Sulphuric acid B A C
Tallow A A A
Tannic acid A A A
Tartaric acid A A A
Trichloroethylene A A B
Zinc chloride A A C

A= Excellent, B= Fair, C= Unsatisfactory

*Feron is Dupont's registered trademark for its Fluorocarbon solvents.