CPP® · UK MANUFACTURER

Chemical Resistance

Chemical Resistance

Braided PVC hose: PVC ratings apply at 20°C to our standard braided hose only. Do not use with hydrocarbons, including petrol, diesel, HVO, kerosene, mineral oils and aromatic solvents.

PVC key: 1 Good · 2 Limited · X Not compatible · X* Hose-specific exclusion · ND Unverified—not an approval.

Confirm the formulation and service conditions. Ratings do not approve a complete hose kit or food/drinking-water use. Ask CPP.

Material limits, FKM O-rings & sources

How to use this guide: Match every wetted component, including seals and springs, to the exact chemical, concentration, temperature and exposure time. A suitable body material does not approve the whole assembly. Complete CPP hose kits are for gravity-fed use only; component ratings do not establish a pressure rating for the kit.

P/P and PE: These are polypropylene and polyethylene material families. Ratings screen published reference materials, not tested CPP mouldings. Glass reinforcement, grade and additives can change resistance; LDPE and HDPE are not interchangeable. Nalgene and ISM PP comparisons use 20°C; IPEX temperature limits are source-specific. Conflicting PE grades or unresolved results are ND. Hydrofluoric acid requires particular confirmation for glass-filled parts.

304 and 316 stainless steel: Use the chart for ambient-temperature screening only. 316 is not immune to chloride pitting or crevice corrosion. Seawater, stagnant salt solutions and hypochlorite bleach need particular care. Brief, dilute disinfection is different from prolonged storage or transfer of concentrated bleach.

TPV (EPDM/PP): Confirm the exact seal compound. EPDM/PP TPV should not be assumed suitable for petroleum fuels, mineral oils or aromatic solvents. Published compound ratings can differ; unresolved matches are shown as ND. No seal temperature rating is established by this table.

FKM O-rings: FKM means fluoroelastomer (fluorocarbon rubber). This column applies to components specified as FKM; CPP standard TPV seals are a different material. FKM generally resists mineral oils and many fuels, but standard compounds have limitations with ketones, certain esters, amines and other polar fluids. Match the exact O-ring compound and service conditions. FKM suitability does not make the braided PVC hose suitable for fuels or oils.

FKM rating basis: Standard FKM data from the Parker and Trelleborg guides linked below, with DEF-specific evidence for the 32.5% urea row. Specialist FKM and FFKM grades are excluded. Parker 1 → 1, 2 → 2, 4 → X; conditional 3 → ND. Trelleborg A → 1, B → 2, U → X; limited C or missing data → ND. Where matched sources differ between 1 and 2, the more cautious 2 is used. Material conflicts, unspecified conditions and unmatched concentrations or formulations remain ND. Trelleborg describes its tests as predominantly at room temperature; these references do not establish a single operating temperature for CPP seals. Hover over an FKM cell for its source or the reason for ND.

DEF / AdBlue (32.5% urea): FKM remains 1 for a compound suitable for DEF: ERIKS lists suitable FKM grades, and Dixon uses FKM-A seals in its DEF nozzle. Cummins lists PE, PP, 304 and 316 stainless steel as DEF-compatible materials, with additive restrictions for plastics. This does not certify CPP glass-filled parts, seals, braided hose or a complete kit for DEF purity. Confirm every finished wetted component and its operating conditions.

Review scope: All 227 chemical rows and seven material columns reviewed against available published data on 29 September 2026. This is a reference-data review, not laboratory testing or certification of CPP products. Unsupported positive ratings, unresolved source conflicts and unmatched concentrations/formulations are shown as ND. ND means unverified, not automatically incompatible, and is not approval. Hover over a rating for its source or limitation. Where a chemical has no stated concentration, a general source entry must not be treated as approval for every dilution, mixture or grade.

How source scales are used: ISM A → 1, B → 2, C/D or PP F/X → X; Nalgene E/G → 1, F → 2, N → X. Masterflex 1 → 1, 2 or 1–2 → 2, x → X; results involving 3 → ND. IPEX numerical limits support screening at 20°C only where the chemical and concentration match; its dash means unsuitable or insufficient data, so it is not treated as a proven X. Positive/excluded conflicts remain ND; 1/2 differences use 2. Blank data never mean compatibility. PVC and FKM use the separate bases stated on this page.

Polymer references: Thermo Scientific Nalgene chemical resistance guide (20°C data; N = not recommended for continuous use; F = some effect after 7 days); IPEX polypropylene guide (grade, filler and temperature limitations).

Seal references: Parker O-Ring Handbook (standard FKM guidance, section 11.3); Trelleborg chemical compatibility guide (August 2012 edition, standard FKM column); Masterflex technical appendix (TPV column; x = non-resistant); ARO compatibility guide (material-family screening); Pierce-Roberts resistance chart (21°C / 70°F screening and compound-dependent differences).

Stainless steel references: British Stainless Steel Association guidance on seawater, sulphuric acid, sodium hypochlorite and high-purity water. The 316 chart reference and its scale are listed above.

Further checked references: ISM PP guide; ISM material compatibility guide; ISM 304 stainless steel guide; Westlake gasket compatibility guide; BSSA acetic acid guidance; BSSA phosphoric acid guidance; BSSA sodium hydroxide guidance; BSSA sulphur dioxide guidance. The Westlake reference is used only for its EPDM/PP TPV gasket data, not as a substitute for the braided-hose PVC data.

Further reference cross-check, 30 September 2026: 19 positive/conditional entries across PP, PE, 316 SS, FKM and TPV were changed to ND because published references conflict. TPV with sulphuric acid at 10% and 90% is limited/conditional (2). Additional reference: Den Hartog product application guide. Cell notes identify the differing results. This does not establish approval for the exact CPP material grade or compound.

316 SS: Room-temperature screening (18–23°C). 1 = excellent; 2 = minor effect; X = not recommended; ND = no verified match or unresolved data. Confirm concentration, formulation and service conditions; these ratings do not approve a complete fitting or spring.

Reference: 316 stainless steel compatibility guide (January 2023; A→1, B→2, C/D→X), with concentration/formulation limits and specialist exceptions explained below, including BSSA guidance for hydrochloric acid. Selected cross-checks and exclusions are explained below. Reference review: 29 September 2026.

The symbols are as a guide to your judgement of the compatibility of the material.

  • 1 Recommended
  • 2 Moderate / slight attack
  • X Not recommended
  • ND Unverified or unresolved — not approval

 

  • P/P Polypropylene
  • PE Polyethylene
  • 304 SS Stainless steel
  • 316 SS Stainless steel (grade 316)
  • FKM Fluoroelastomer (fluorocarbon rubber), where specified
  • TPV (EPDM/PP) Thermoplastic vulcanizate: cross-linked EPDM rubber dispersed in a polypropylene matrix. CPP standard seal, gasket and O-ring material, where specified.

 

 

Note: this is a guide only. We recommend that anyone intending to rely on this guide satisfy themselves as to such suitability and that all applicable health and safety standards are met. The only reliable means for making a final selection is actual field-testing under the conditions of intended use

Media PVC P/P PE 304 SS 316 SS FKM TPV
ASTM Oil No. 1 X ND 2 ND ND 1 ND
ASTM Oil No. 2 X* ND ND ND ND 1 ND
ASTM Oil No. 3 X ND ND ND ND 1 X
Acetaldenyde X 1 ND 1 ND X 1
Acetic acid (10%) 1 1 1 1 1 ND 1
Acetic acid (Glacial) X 1 ND ND 1 X ND
Acetic anhydrid X 2 X ND ND X ND
Acetone X 2 ND 1 1 X 1
Acetonitrile ND 2 1 ND 1 ND ND
Acetophenone X 1 ND ND 1 X 2
Acetyl Chloride ND ND ND ND ND 1 X
Acrylic acid ND ND ND ND 1 ND 1
Aluminium chloride (10%) ND 1 ND ND ND ND ND
Aluminium sulphate 1 1 1 2 2 1 1
Ammonium hydroxide (35%) ND ND ND ND ND ND ND
Ammonium sulhate (50%) ND 1 ND ND ND ND ND
Amyl acetate X ND ND 1 1 X ND
Amyl alcohol 1 2 2 1 1 2 ND
Aniline X ND ND 1 2 ND ND
Antimony Trichloride (10%) ND ND ND ND ND ND ND
Aqua regia ND X X X ND ND ND
Arsenic acid 1 1 2 1 1 1 1
Barium chloride ND 1 1 1 1 1 1
Benzaldehyde X X 2 2 2 X 2
Benzene X ND ND 2 2 1 X
Benzyl alcohol X ND ND 2 2 1 2
Benzyl chloride X X ND X 2 1 X
Boric acid ND 1 1 2 1 1 1
Bromine liquid X X ND X X 2 ND
Butyl alcohol (Butanol) 1 1 2 1 1 ND 1
Buty acetate X X ND 2 1 X ND
Butyl Chloride ND ND ND ND 1 ND ND
Butylamine ND 2 ND 1 1 X 1
Butyric acid 1 2 X 2 2 2 ND
Calcium chloride 1 1 1 X 2 1 1
Carbon disulphide ND ND X 1 2 1 ND
Carbon tetrachlorode X ND ND 2 2 1 X
Castor oil X 1 ND 1 1 1 ND
Cellosolve ND ND ND ND ND X ND
Cellosolve acetate ND ND 1 ND ND X 2
Chloracetic acid X ND ND 2 ND X 2
Chlorine gas (dry) X X X 1 2 1 ND
Chlorine dioxide ND ND ND ND ND ND ND
Chlorine water 1 X ND X X ND ND
Chlorobenzene X ND ND 1 2 2 X
Chloroform X X X 1 1 2 X
Chorosulphonic acid X X X X ND X ND
Chrome plating solution ND ND ND ND ND ND ND
Chromic acid ND ND ND ND ND 1 ND
Citric acid (10%) ND 1 ND 2 ND ND ND
Codliver oil ND 1 ND 1 1 1 2
Copper sulphate 1 1 1 2 ND 1 ND
Cotton seed oil ND 1 1 1 1 1 2
Cresols X X ND 1 1 1 2
Cyclo-hexanone X ND ND 1 1 X ND
Cyclohexane X* ND ND 1 1 1 ND
Cyclohexanol X 1 2 ND 1 1 2
Decalin X* X 2 ND ND 1 X
Diesel oil X ND ND 1 1 1 ND
Diethylether X ND ND 2 2 X ND
Diethylamine X 1 ND 1 1 X 1
Diethylene glycol 1 1 2 1 1 1 1
Dimethyl formamide X 1 1 1 2 X 1
Dimethylamine X ND ND ND ND X 1
Dimethylhydrazine ND ND ND ND ND ND ND
Dioctylphthalate ND ND ND ND ND ND ND
Dioxane X ND ND ND ND ND ND
Ethylacetate X ND 2 2 ND X ND
Ethyl alcohol (Ethanol) ND 1 2 1 1 ND ND
Ethyl chloride X X X 1 1 2 ND
Ethylamine ND ND ND ND ND ND ND
Ethylene bromide ND X ND 1 1 1 ND
Ethylene dichloride X ND ND 2 2 1 ND
Ethylene glycol 2 1 1 2 ND 1 1
Ferric choride 1 1 1 X X 1 1
Fluoboric acid ND 1 ND 2 2 ND ND
Fluorine (gas) X X ND X ND X ND
Fluosilic acid ND 1 ND X ND 1 1
Formaldehyde (40%) 2 1 ND 1 1 ND ND
Formic acid (90%) ND 1 ND ND ND ND ND
Freon-11 X ND ND 1 1 2 ND
Freon-113 X X ND 1 1 2 ND
Freon-115 ND ND ND ND ND 2 ND
Freon-12 X 1 ND 2 2 2 ND
Freon-13B1 ND ND ND ND ND 2 ND
Freon-21 X X ND ND ND X ND
Freon-22 X 2 ND 1 1 X ND
Freon-32 ND ND ND ND ND X ND
Furfural 1 X ND 1 2 X ND
Glycerol X 1 1 1 1 1 1
Hexane X 2 ND 1 1 1 X
Hydrazine X X ND 1 1 ND ND
Hydrobromic acid (50%) X ND ND ND ND ND ND
Hydrochloric acid (10%) ND 1 ND X X ND ND
Hydrochloric acid (36%) ND ND ND X X ND ND
Hydrofluric acid (40%) X ND ND ND ND ND ND
Hydrogen peroxide (35%) ND ND ND ND ND ND ND
Hydrogen peroxide (87%) ND ND ND ND ND ND ND
Hydrogen sulphide gas X ND 1 ND ND X 1
Iso-octane X ND ND 1 1 1 X
Iso-propyl alcohol 1 1 1 2 2 1 1
Lactic acid (90%) ND ND ND ND ND ND ND
Lead acetate (10%) ND 1 ND ND ND ND ND
Linseed oil ND 1 2 1 1 1 ND
Lubricating oil X ND ND ND ND ND ND
Magnesium Chloride 1 1 1 X X 1 1
Maganese sulphate 1 ND ND 2 2 ND ND
Mercuric chloride X 1 1 ND ND 1 1
Methyl alcohol ND 1 1 1 1 ND 1
Methyl bromide (gas) ND ND ND 1 ND 1 ND
Methyl ethyl ketone X 2 ND 1 1 X 1
Methylene dichloride ND ND ND 2 2 2 ND
Molasses ND 1 1 1 1 1 1
Monoethanolamine X 2 ND 1 1 X ND
n-propanol ND 1 2 1 1 ND 1
Nickechloride 1 1 1 X X 1 2
Nitric acid (10%) ND 1 2 1 1 1 1
Nitric acid (70%) ND X 2 ND ND ND ND
Nitrobenzene ND ND ND 2 2 ND ND
Nitromethane X 2 ND 1 1 X ND
Nitropropane ND ND ND ND ND ND ND
Oleic acid X 2 ND 1 1 2 ND
Olive oil ND 1 1 1 1 1 2
Oxalic acid (solutions) X ND 1 ND ND ND 1
Ozone (gas) 1 2 ND 2 1 1 2
Paraffin oil X* ND ND 1 1 1 ND
Perchlorethylene X X X 2 1 2 X
Peroxymonosulphuric acid ND ND ND ND ND ND ND
Petrol X ND ND 1 ND ND ND
Phenol X 2 X 2 2 2 ND
Phosphoric acid (85%) 1 1 2 ND ND ND 1
Picric acid (solutions) ND ND 1 ND ND 1 1
Plating solutions (non-chrome) ND ND ND ND ND ND ND
Potassium cyanide X 1 1 2 2 1 1
Potassium fluoride ND 1 ND ND 1 ND ND
Potassium hydroxide (50%) ND 1 ND ND ND ND 1
Potassium permanganate (25%) ND ND ND ND ND ND ND
Potassium sulphate 1 1 1 2 1 1 ND
Propionic acid ND 1 1 ND ND 1 1
Propylene oxide X 2 2 ND ND X 1
Pyridine X ND ND 1 1 ND ND
Rapeseed oil ND ND X ND 1 1 2
Silcone fluids ND ND ND ND ND ND ND
Silver nitrate 1 1 1 2 2 1 1
Sodium borate ND ND 1 2 ND ND 1
Sodium carbonate (10%) ND 1 1 ND ND ND ND
Sodium chloride (25%) ND 1 ND ND ND ND ND
Sodium cyanide 1 1 1 1 2 1 1
Sodium hydroxide (10%) 1 1 1 1 1 X ND
Sodium hydroxide (60%) ND 1 ND ND ND ND ND
Sodium hypochlorite (20%) ND ND ND X X 1 ND
Sodium nitrate 1 1 ND 2 2 1 1
Sour oil X* ND ND ND ND ND ND
Stannic chloride ND 1 ND X X 1 ND
Styrene X ND ND 1 1 ND ND
Sulphamic acid (solutions) ND 1 ND ND ND ND ND
Sulphur dioxide (gas) 1 1 ND ND ND X ND
Sulphuric acid (10%) 1 1 1 X ND ND 2
Sulphuric acid (70%) X 2 ND X X ND ND
Sulphuric acid (90%) X ND ND ND X ND 2
Sulphric acid (fuming) ND ND ND ND ND 1 X
Tetrachloethane ND ND ND ND ND ND ND
Tetrahydrofurane X ND ND 1 1 X 2
Tetrlin X X ND ND 1 1 ND
Thionyl chloride ND ND X ND X 1 X
Titaniun tetrachloride ND 1 ND ND 2 2 ND
Toluene X ND ND 1 1 2 X
Transformer oil ND ND ND ND ND ND ND
Trichoracetic acid ND 1 ND X X ND ND
Trichlorethane X ND ND ND ND ND ND
Trichlorethylene X X X 2 2 2 ND
Tricresy phosphate ND ND ND ND ND ND ND
Troethanolamine 1 1 1 ND 1 X 1
Triethyamine ND X ND 1 1 ND 1
Turpentine X ND ND 1 1 1 X
Vegetable oils (general) ND 1 ND 1 ND ND 2
Vinyl acetate X 2 1 2 2 ND 1
Vinyl chloride X ND ND 2 1 ND ND
Water (distilled) ND 1 1 1 1 ND 1
Water (sea) 1 1 1 X X 2 1
White spirit X 2 ND 1 1 1 X
Wine ND 1 ND 1 ND ND 1
Xylene X ND ND 2 2 2 X
Zinc chloride (aq.sol.) 1 1 1 2 X 1 1

Note: this is a guide only. We recommend that anyone intending to rely on this guide satisfy themselves as to such suitability and that all applicable health and safety standards are met. The only reliable means for making a final selection is actual field-testing under the conditions of intended use

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