Hydrochloric Acid (15%) vs HDPE Compatibility
Verified chemical resistance rating (Safe for Continuous Industrial Service), thermal boundary limits (Ambient to elevated operating temperatures within standard material limits), and material specification guide for HDPE exposed to Hydrochloric Acid (15%) in Halogenated / Mineral Acid service.
Hydrochloric Acid (15%) vs HDPE: A-Excellent
Exposing HDPE to Hydrochloric Acid (15%) (Formula: HCl (15% aq.), CAS: 7647-01-0) carries an official rating of A-Excellent (Safe for Continuous Industrial Service). Maximum recommended thermal operating limit: Ambient to elevated operating temperatures within standard material limits. Best Grade A alternative materials for continuous or high-temperature service: Polypropylene, Viton, PTFE, EPDM.
Technical Specifications and Operating Parameters
| Chemical Medium | Hydrochloric Acid (15%) |
|---|---|
| Chemical Formula | HCl (15% aq.) |
| CAS Registry Number | 7647-01-0 |
| Chemical Functional Class | Halogenated / Mineral Acid |
| Wetted Material | HDPE |
| Official Resistance Rating | A-Excellent (Grade A) |
| Engineering Service Verdict | Safe for Continuous Industrial Service |
| Max Temp and Concentration Limit | Ambient to elevated operating temperatures within standard material limits |
| Best Grade A Alternatives | Polypropylene, Viton, PTFE, EPDM |
| Backtest and Audit Verification | Verified against Cole-Parmer, ISM, Graco & CP Lab Safety industrial chemical resistance charts. |
Hydrochloric Acid (15%) Cross-Material Comparison Matrix (9 Materials)
Direct benchmark ratings across all 9 reference industrial materials for Hydrochloric Acid (15%):
| Material Name | Compatibility Rating | Service Verdict | Temperature Limit | Datasheet |
|---|---|---|---|---|
| Buna-N | B-Good | Acceptable with Operating Controls | Ambient service (72°F / 22°C) preferred; monitor wear in continuous service | Report |
| EPDM | A1-Excellent | Safe for Continuous Industrial Service | Up to 120°F (49°C) verified; up to material thermal limit in non-pressurized service | Report |
| HDPE | A-Excellent | Safe for Continuous Industrial Service | Ambient to elevated operating temperatures within standard material limits | Report |
| Polypropylene | A2-Excellent | Safe for Continuous Ambient Service | Verified up to 72°F (22°C); conduct thermal de-rating above 100°F (38°C) | Report |
| PTFE | A-Excellent | Safe for Continuous Industrial Service | Ambient to elevated operating temperatures within standard material limits | Report |
| PVC | A-Excellent | Safe for Continuous Industrial Service | Ambient to elevated operating temperatures within standard material limits | Report |
| PVDF | A-Excellent | Safe for Continuous Industrial Service | Ambient to elevated operating temperatures within standard material limits | Report |
| Stainless Steel | D-Severe Effect | Incompatible — Immediate Failure Risk | Not recommended at any temperature or concentration | 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
Hydrochloric Acid (15%) vs HDPE: A – Excellent (Fully Compatible)
Summary Verdict: HDPE (High-Density Polyethylene) is rated A-Excellent (Safe for Continuous Industrial Service) when exposed to Hydrochloric Acid (15%) (Formula: HCl (15% aq.), CAS: 7647-01-0). Approved for continuous fluid handling, bulk storage, valves, and sealing assemblies.
Quick Engineering Specifications
| Chemical Media | Hydrochloric Acid (15%) |
|---|---|
| Chemical Formula | HCl (15% aq.) |
| CAS Registry Number | 7647-01-0 |
| Chemical Classification | Halogenated / Mineral Acid |
| Wetted Material | HDPE (High-Density Polyethylene) (Linear Semi-Crystalline Polyolefin Thermoplastic) |
| Official Resistance Rating | A – Excellent (Fully Compatible) (Grade A) |
| Recommended Temperature Window | Ambient to elevated operating temperatures within standard material limits (Material limit: -60°F to 140°F (-51°C to 60°C)) |
| Top Grade-A Alternatives | Polypropylene, Viton, PTFE, EPDM |
| Data Verification Status | Verified against Cole-Parmer, ISM, Graco & CP Lab Safety industrial chemical resistance charts. |
Chemical & Material Interaction Analysis
Hydrochloric Acid (15%) is classified as a halogenated / mineral acid (aggressive halide ion attack, pitting risk in metals, and acid hydrolysis). Used in acid pickling, descaling, semiconductor etching, and industrial chemical processing. When selecting wetted components for HDPE, engineers must account for both concentration-dependent chemical attack and thermal stress:
- Reaction & Failure Mechanism: Chemically inert interface with no measurable corrosion, polymer chain scission, or elastomeric swell under standard operating conditions.
- 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 Hydrochloric Acid (15%)
To help you select the longest-lasting piping, valve lining, or O-ring seal for Hydrochloric Acid (15%), 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) | A2-Excellent | Safe for Continuous Ambient Service | 32°F to 180°F (0°C to 82°C) |
| 316 / 304 Austenitic Stainless Steel | D-Severe Effect | Incompatible — Immediate Failure Risk | -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) | A1-Excellent | Safe for Continuous Industrial Service | -60°F to 300°F (-51°C to 149°C) |
| PVC Type I (Unplasticized Polyvinyl Chloride / uPVC) | A-Excellent | Safe for Continuous Industrial Service | 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) | B-Good | Acceptable with Operating Controls | -40°F to 250°F (-40°C to 121°C) |
| HDPE (High-Density Polyethylene) (Current Page) | A-Excellent | Safe for Continuous Industrial Service | -60°F to 140°F (-51°C to 60°C) |
Frequently Asked Questions (FAQ)
Is HDPE compatible with Hydrochloric Acid (15%)?
HDPE is rated A-Excellent (Safe for Continuous Industrial Service) with Hydrochloric Acid (15%) (Formula: HCl (15% aq.), CAS: 7647-01-0). Chemically inert interface with no measurable corrosion, polymer chain scission, or elastomeric swell under standard operating conditions. Approved for continuous fluid handling, bulk storage, valves, and sealing assemblies.
What is the best alternative material for handling Hydrochloric Acid (15%)?
If HDPE does not meet your temperature or pressure requirements for Hydrochloric Acid (15%), the highest-rated Grade A alternatives are Polypropylene, Viton, PTFE, EPDM. Always verify O-ring elastomers and metallic fasteners separately before full-scale deployment.
Technical Engineering FAQs: Hydrochloric Acid (15%) vs HDPE
Click any question below for chemical failure-mode specifics, thermal derating limits, and material selection rules: