Chemical Compatibility Chart for Poly Tubing | Apex Flow

Plastic tubing fails in three predictable ways when the material is wrong for the fluid: it swells and softens, it embrittles and cracks, or it permeates and weeps. Each is avoidable by matching the polymer to the chemistry before installation. This chart rates the four most common poly tubing materials — polyethylene (PE), PVC, PTFE, and PFA — against the acids, caustics, solvents, and oxidizers handled in water treatment, chemical feed, and laboratory systems.

Apex Flow Solutions stocks poly tubing in PE, PVC, and fluoropolymer grades. Use the ratings below to confirm compatibility, then verify temperature and concentration before you order.

Running hot or concentrated chemistry?

Compatibility ratings assume ambient temperature. Heat and high concentration both reduce real-world resistance. Contact our team with your fluid, concentration, and temperature for a confirmed recommendation.

The Four Poly Tubing Materials

Polyethylene (PE/LLDPE/HDPE) is flexible, inexpensive, and resists most acids, bases, and salts at ambient temperature — but it is attacked by oxidizers and many hydrocarbons and softens above roughly 140°F. PVC is rigid-to-semi-flexible, handles acids and bases well, and is common in water treatment, but it is dissolved by ketones, esters, and aromatic/chlorinated solvents and is limited to about 140°F. PTFE (Teflon) is the chemical workhorse — virtually inert to everything and rated to 400°F+ — but it is stiff, more expensive, and slightly gas-permeable. PFA is a melt-processable fluoropolymer with PTFE-level chemical resistance plus better clarity and flex; it is the premium choice for high-purity and high-temperature service.

Coils of PE, PVC, PTFE, and PFA tubing arranged together

From flexible PE to inert fluoropolymer PFA, tubing material choice is driven by chemistry, temperature, and purity requirements.

Compatibility Rating Scale

Rating	Meaning
A	Excellent — no significant effect, continuous service
B	Good — minor effect, suitable for most service
C	Fair — moderate effect, intermittent only
D	Not Recommended — severe effect, do not use

Master Compatibility Chart

Ratings at ambient temperature (~70°F) and typical concentration. A = Excellent, B = Good, C = Fair, D = Not Recommended.

Chemical	PE	PVC	PTFE	PFA
Sulfuric Acid (<50%)	A	A	A	A
Hydrochloric Acid (37%)	A	A	A	A
Sodium Hydroxide (50%)	A	A	A	A
Sodium Hypochlorite (12.5%)	B	A	A	A
Hydrogen Peroxide (35%)	C	B	A	A
Acetone (Ketone)	B	D	A	A
Toluene (Aromatic Solvent)	C	D	A	A
Diesel / Fuel Oil	C	B	A	A
Ethanol / IPA	A	B	A	A
Nitric Acid (<30%)	C	B	A	A
Sodium Chloride (Brine)	A	A	A	A
Deionized Water	A	A	A	A

The pattern is clear: PTFE and PFA are nearly universal, PE is strong on acids/bases/alcohols but weak on oxidizers and hydrocarbons, and PVC is excellent on inorganic acids and bases but dissolved by ketones and aromatic/chlorinated solvents. When a line will see solvents, default to a fluoropolymer.

Temperature Rating Reference

Maximum continuous service temperature is as important as chemical class — many compatibility ratings collapse near a material's thermal limit.

Material	Max Continuous Temp	Flexibility	Relative Cost
PE (LLDPE/HDPE)	140°F (60°C)	Flexible	$
PVC (flexible)	140°F (60°C)	Semi-flexible	$
PFA	500°F (260°C)	Flexible	$$$$
PTFE	500°F (260°C)	Stiff	$$$

Color-coded chemical compatibility matrix for poly tubing materials

At a glance: fluoropolymers (PTFE/PFA) clear nearly every column, while PE and PVC each have a class of chemicals to avoid.

Selecting by Application

For ambient-temperature acid and caustic feed (water treatment, plating), PE or PVC tubing is economical and fully adequate. For chlorine/hypochlorite dosing, PVC and fluoropolymers outperform PE. For solvents, fuels, and aromatics, only PTFE or PFA should be used — PVC dissolves and PE swells. For high-purity, high-temperature, or analytical applications, PFA is the standard because it combines inertness, clarity, and a 500°F rating. When in doubt between two candidates, the fluoropolymer is the conservative choice; the only penalty is cost and stiffness.

Standards & References

Polyethylene tubing follows ASTM D3350 (PE cell classification) and pressure-rated PE pipe is governed by ASTM D2737. PVC compounds are classified under ASTM D1784. PTFE tubing dimensions and properties reference ASTM D3295, and PFA follows ASTM D3307. For potable water contact, tubing must carry NSF/ANSI 51 (food equipment materials) or NSF/ANSI 61 certification. As always, the material standard governs the polymer; the published chemical-resistance data for the specific product and concentration is the final authority.

Frequently Asked Questions

What tubing is most chemically resistant?

PTFE and PFA are the most chemically resistant common tubing materials — they resist virtually all acids, bases, solvents, and oxidizers and are rated to about 500°F. PFA adds better flexibility and clarity; PTFE is stiffer and slightly lower cost.

Can PVC tubing handle solvents like acetone?

No. PVC is dissolved or severely softened by ketones (acetone, MEK), esters, and aromatic/chlorinated solvents. Use PTFE or PFA tubing for those fluids.

Is polyethylene tubing good for chlorine?

PE is rated "fair-to-good" for sodium hypochlorite at ambient temperature but degrades over time with oxidizer exposure. For chlorine and hypochlorite dosing, PVC or fluoropolymer tubing lasts longer.

Does temperature affect tubing chemical compatibility?

Yes. Higher temperature lowers resistance and approaches the material's thermal limit. PE and PVC top out near 140°F, while PTFE and PFA hold to about 500°F. Always check ratings at your operating temperature.

What tubing should I use for high-purity or lab work?

PFA is the standard for high-purity, analytical, and semiconductor applications because it is inert, low-leaching, translucent for flow visibility, and rated to 500°F.