n-Hexane vs HDPE Compatibility
Verified chemical resistance rating (Acceptable with Routine Inspection), thermal boundary limits (Up to 120°F (49°C) with minor absorption/corrosion allowance), and material specification guide for HDPE exposed to n-Hexane in Aliphatic Hydrocarbon / Fuel / Industrial Oil service.
n-Hexane vs HDPE: B1-Good
Exposing HDPE to n-Hexane (Formula: C6H14 (CH3(CH2)4CH3), CAS: 110-54-3) carries an official rating of B1-Good (Acceptable with Routine Inspection). Maximum recommended thermal operating limit: Up to 120°F (49°C) with minor absorption/corrosion allowance. Best Grade A alternative materials for continuous or high-temperature service: Stainless Steel, Viton, PTFE, PVDF.
Technical Specifications and Operating Parameters
| Chemical Medium | n-Hexane |
|---|---|
| Chemical Formula | C6H14 (CH3(CH2)4CH3) |
| CAS Registry Number | 110-54-3 |
| Chemical Functional Class | Aliphatic Hydrocarbon / Fuel / Industrial Oil |
| Wetted Material | HDPE |
| Official Resistance Rating | B1-Good (Grade B) |
| Engineering Service Verdict | Acceptable with Routine Inspection |
| Max Temp and Concentration Limit | Up to 120°F (49°C) with minor absorption/corrosion allowance |
| Best Grade A Alternatives | Stainless Steel, Viton, PTFE, PVDF |
| Backtest and Audit Verification | Verified against Cole-Parmer, ISM, Graco & CP Lab Safety industrial chemical resistance charts. |
n-Hexane Cross-Material Comparison Matrix (9 Materials)
Direct benchmark ratings across all 9 reference industrial materials for n-Hexane:
| Material Name | Compatibility Rating | Service Verdict | Temperature Limit | Datasheet |
|---|---|---|---|---|
| Buna-N | A-Excellent | Safe for Continuous Industrial Service | Ambient to elevated operating temperatures within standard material limits | Report |
| EPDM | D-Severe Effect | Incompatible — Immediate Failure Risk | Not recommended at any temperature or concentration | Report |
| HDPE | B1-Good | Acceptable with Routine Inspection | Up to 120°F (49°C) with minor absorption/corrosion allowance | Report |
| Polypropylene | B1-Good | Acceptable with Routine Inspection | Up to 120°F (49°C) with minor absorption/corrosion allowance | Report |
| PTFE | A-Excellent | Safe for Continuous Industrial Service | Ambient to elevated operating temperatures within standard material limits | Report |
| PVC | B1-Good | Acceptable with Routine Inspection | Up to 120°F (49°C) with minor absorption/corrosion allowance | Report |
| PVDF | A-Excellent | Safe for Continuous Industrial Service | Ambient to elevated operating temperatures within standard material limits | Report |
| Stainless Steel | A-Excellent | Safe for Continuous Industrial Service | Ambient to elevated operating temperatures within standard material limits | Report |
| Viton | A-Excellent | Safe for Continuous Industrial Service | Ambient to elevated operating temperatures within standard material limits | Report |
Chemical and Material Interaction Analysis
Engineering Compatibility Verdict
n-Hexane vs HDPE: B1 – Good (Minor Effect up to 120°F / 49°C)
Summary Verdict: HDPE (High-Density Polyethylene) is rated B1-Good (Acceptable with Routine Inspection) when exposed to n-Hexane (Formula: C6H14 (CH3(CH2)4CH3), CAS: 110-54-3). Suitable for secondary transfer lines, static gaskets, and intermittent batch service. Avoid thin-walled high-stress dynamic seals without prior coupon testing.
Quick Engineering Specifications
| Chemical Media | n-Hexane |
|---|---|
| Chemical Formula | C6H14 (CH3(CH2)4CH3) |
| CAS Registry Number | 110-54-3 |
| Chemical Classification | Aliphatic Hydrocarbon / Fuel / Industrial Oil |
| Wetted Material | HDPE (High-Density Polyethylene) (Linear Semi-Crystalline Polyolefin Thermoplastic) |
| Official Resistance Rating | B1 – Good (Minor Effect up to 120°F / 49°C) (Grade B) |
| Recommended Temperature Window | Up to 120°F (49°C) with minor absorption/corrosion allowance (Material limit: -60°F to 140°F (-51°C to 60°C)) |
| Top Grade-A Alternatives | Stainless Steel, Viton, PTFE, PVDF |
| Data Verification Status | Verified against Cole-Parmer, ISM, Graco & CP Lab Safety industrial chemical resistance charts. |
Chemical & Material Interaction Analysis
n-Hexane is classified as an aliphatic hydrocarbon / fuel / industrial oil (hydrocarbon permeation and softening in non-oil-resistant polymers and EPDM rubbers). Used in fuel transfer lines, hydraulic power units, lubrication systems, and petrochemical storage. When selecting wetted components for HDPE, engineers must account for both concentration-dependent chemical attack and thermal stress:
- Reaction & Failure Mechanism: Causes slight surface absorption, minor weight gain (1%–5% swell in polymers), or a low corrosion rate (<2 to 20 mpy in metals) up to 120°F (49°C).
- Material Profile (HDPE): High impact strength (even at sub-zero temperatures) and excellent resistance to mineral acids, caustics, salt brines, and alcohols. However, lower upper temperature limit (140°F/60°C) than Polypropylene, with susceptibility to permeation and environmental stress cracking in aromatic/chlorinated hydrocarbons and strong oxidizers.
- Application Scope: Common wetted components include bulk chemical storage tanks, IBC totes, double-containment underground piping, and chemical drum liners.
Cross-Material Compatibility Comparison for n-Hexane
To help you select the longest-lasting piping, valve lining, or O-ring seal for n-Hexane, the table below compares HDPE against 8 other common industrial engineering materials:
| Wetted Material | Compatibility Rating | Service Recommendation | Material Temp Range |
|---|---|---|---|
| Polypropylene (PP Homopolymer & Copolymer) | B1-Good | Acceptable with Routine Inspection | 32°F to 180°F (0°C to 82°C) |
| 316 / 304 Austenitic Stainless Steel | A-Excellent | Safe for Continuous Industrial Service | -325°F to 800°F (-198°C to 426°C) |
| Viton® (FKM Fluoroelastomer) | A-Excellent | Safe for Continuous Industrial Service | -15°F to 400°F (-26°C to 204°C) |
| PTFE (Teflon® / Polytetrafluoroethylene) | A-Excellent | Safe for Continuous Industrial Service | -328°F to 500°F (-200°C to 260°C) |
| EPDM (Ethylene Propylene Diene Monomer) | D-Severe Effect | Incompatible — Immediate Failure Risk | -60°F to 300°F (-51°C to 149°C) |
| PVC Type I (Unplasticized Polyvinyl Chloride / uPVC) | B1-Good | Acceptable with Routine Inspection | 32°F to 140°F (0°C to 60°C) |
| PVDF (Kynar® / Polyvinylidene Fluoride) | A-Excellent | Safe for Continuous Industrial Service | -40°F to 280°F (-40°C to 138°C) |
| Buna-N (Nitrile / NBR Elastomer) | A-Excellent | Safe for Continuous Industrial Service | -40°F to 250°F (-40°C to 121°C) |
| HDPE (High-Density Polyethylene) (Current Page) | B1-Good | Acceptable with Routine Inspection | -60°F to 140°F (-51°C to 60°C) |
Frequently Asked Questions (FAQ)
Is HDPE compatible with n-Hexane?
HDPE is rated B1-Good (Acceptable with Routine Inspection) with n-Hexane (Formula: C6H14 (CH3(CH2)4CH3), CAS: 110-54-3). Causes slight surface absorption, minor weight gain (1%–5% swell in polymers), or a low corrosion rate (<2 to 20 mpy in metals) up to 120°F (49°C). Suitable for secondary transfer lines, static gaskets, and intermittent batch service. Avoid thin-walled high-stress dynamic seals without prior coupon testing.
What is the best alternative material for handling n-Hexane?
If HDPE does not meet your temperature or pressure requirements for n-Hexane, the highest-rated Grade A alternatives are Stainless Steel, Viton, PTFE, PVDF. Always verify O-ring elastomers and metallic fasteners separately before full-scale deployment.
Technical Engineering FAQs: n-Hexane vs HDPE
Click any question below for chemical failure-mode specifics, thermal derating limits, and material selection rules: