SJ Gauge: The following is a reference table for the corrosion resistance of pressure gauges with "PP (Polypropylene) material" to different chemicals (Test: Immersion time 6 months).
 

Polypropylene Corrosion Resistance Chart

Symbol Explanation:
◎: Virtually unaffected
△: Visible effects such as discoloration, with some degree of size and weight change.
○: Slight discoloration and weight change, no change in ductility.
×: Sometimes embrittled, swollen, with noticeable changes in appearance, weight, and ductility.

Chemical Name Concentration
（％）		 Operating Environment
20°C 60°C
Hydrochloric Acid 2 ◎ ◎
10 ◎ ◎
30 ◎ ◎
36 ◎ △
Sulfuric Acid 2 ◎ ◎
5 ◎ ◎
10 ◎ ◎
30 ◎ ◎
98 ◎ △
Fuming Sulfuric Acid - △ △
Nitric Acid 10 ◎ ○
30 △ ×
50 △ ×
Fuming Nitric Acid - △ ×
Phosphoric Acid 10 ◎ ◎
30 ○ ○
85 ○ ○
Hydrofluoric Acid 55 ○ ○
Aqua Regia - △ △
Hydrofluoric Acid 40 △  
Sulfur - ◎ ◎
Caustic Soda 10 ◎ ◎
30 ◎ ◎
50 ◎ ◎
Caustic Potash 10 ◎ ◎
50 ◎ ◎
Ammonium Hydroxide 15 ◎ ◎
25 ◎ ◎
Sodium Bisulfite Saturated Sodium ◎ ◎
Copper Sulfate 40g/L ◎ ◎
Potassium Sulfide Saturated ◎ ◎
Ammonium Chloride Saturated ◎ ◎
Saltwater 10 ◎ ◎
100 ◎ ◎
Calcium Chloride Saturated ◎ ◎
Nickel Chloride Saturated ◎ ◎
Potassium Chlorate 10 ◎ ◎
Sodium Bicarbonate Saturated ◎ ◎
Soda Saturated ◎ ◎
Sodium Hydrogen Carbonate Saturated ◎ ◎
Hydrogen Peroxide Solution 10 ◎ ◎
30 △ △
Sodium Hypochlorite Solution 5 ◎ ◎
10 ◎ ○
Potassium Permanganate 10 ◎  
Potassium Dichromate 10 ◎  
Acetic Acid 10 ◎ ◎
30 ◎ ◎
50 ◎ ○
97 ◎  
Glacial Acetic Acid 100 ○  
Lactic Acid 20 ◎ ◎
100 ◎ ◎
Trichloroacetic Acid 10 ◎ ◎
Citric Acid 10 ◎ ◎
50 ◎ ◎
Formic Acid 10 ◎ ◎
85 ◎ ◎
100 ◎  
Ｏxalic Ａcid 50 ◎ ○
Benzoic Acid 50 ◎ ◎
Oleic Acid 50 ◎ ◎
Salicylic Acid 50 ◎ ◎
Tartaric Acid 50 ◎ ◎
Tannic Acid Saturated ◎ ◎
Phenol 50 ◎ ○
Boric Acid 50 ◎ ◎
Malic Acid 50 ◎ ◎
Succinic Acid 50 ◎ ◎
Cresol 50 ◎ ○
Ethyl Ｃhloride 40 ○ △
Methylene Chloride 40 ○ △
Chloroform 40 ○ △
100 △ ×
Carbon Tetrachloride 40 ○ △
100 △ △
o-Dichlorobenzene 40 ◎ △
p-Dichlorobenzene 40 ◎ △
Tetrachloroethane 40 ◎ △
Tetrachloroethylene 40 ◎ △
Trichlorethylene Ethane 40 ◎ △
Trichloroethylene 40 ◎ △
100 △ △
Trichlorobenzene 40 ○ △
Dichloroethane 40 ○ △
Vinyl Chloride 40 ○ △
Hexachlorobenzene 40 ○ △
Chlorobenzene 40 ○ △
B・H・C 20 ◎ ◎
Chloroacetic Acid 100 ◎ ◎
Methanol 100 ◎ ◎
Ethanol 96 ◎ ◎
Isopropanol 100 ◎ ◎
Ethylene Glycol 100 ◎ ◎
Glycerol 100 ◎ ◎
n-Butyl Alcohol 100 ◎ ○
Ethyl Acetate 100 ○ ○
Butyl Acetate 100 △ △
Acetone 100 △ △
Cyclohexanone 100 △ △
Benzyl Alcohol 100 △ △
Formaldehyde 37 ◎ ◎
Furfural 100 ○ △
Gasoline 100 ◎ ○
Kerosene 100 ○ ○
Spindle Oil 100 ○ ○
Lubricating Oil 100 ○ ○
Paraffin Wax 100 ◎ ○
White Oil 100 ○ △
Liquid Paraffin 100 ○ ○
Turpentine 100 △ △
Linseed Oil 100 ◎ ◎
Olive Oil 100 ◎ ◎
Petroleum Ether 100 ○ ○
Castor Oil 100 ◎ ◎
Wax 100 ◎ ◎
Lard 100 ◎ ◎
Benzene 10 ◎ ○
100 ○ △
o-Xylene 10 ◎ ○
100 ○ △
p-Xylene 10 ◎ ○
100 ○ △
m-Xylene 100 ○ △
Toluene 100 ○ △
Ethyl Ether 100 ○  
Dioxane 100 ○ ○
Decahydronaphthalene 100 △ △
Tetrahydrofuran 100 △ △
Tetralin 100 △ △
Nitrobenzene 100 ◎ ◎
Aniline 100 ◎ ◎
Nitrobenzene 100 ◎  
Naphthalene - ◎  
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