Hydrochloric Acid 37% vs Viton 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 Viton exposed to Hydrochloric Acid 37% in Halogenated / Mineral Acid service.
Hydrochloric Acid 37% vs Viton: A-Excellent
Exposing Viton to Hydrochloric Acid 37% (Formula: HCl (37% aq. Reagent Grade), 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: PTFE, PVC, PVDF.
Technical Specifications and Operating Parameters
| Chemical Medium | Hydrochloric Acid 37% |
|---|---|
| Chemical Formula | HCl (37% aq. Reagent Grade) |
| CAS Registry Number | 7647-01-0 |
| Chemical Functional Class | Halogenated / Mineral Acid |
| Wetted Material | Viton |
| 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 | PTFE, PVC, PVDF |
| Backtest and Audit Verification | Verified against Cole-Parmer, ISM & Graco industrial chemical resistance charts. |
Hydrochloric Acid 37% Cross-Material Comparison Matrix (9 Materials)
Direct benchmark ratings across all 9 reference industrial materials for Hydrochloric Acid 37%:
| Material Name | Compatibility Rating | Service Verdict | Temperature Limit | Datasheet |
|---|---|---|---|---|
| Buna-N | C-Fair | Caution: Limited / Intermittent Service Only | Ambient intermittent contact only; do not pressurize | Report |
| EPDM | B-Good | Acceptable with Operating Controls | Ambient service (72°F / 22°C) preferred; monitor wear in continuous service | Report |
| HDPE | C1-Fair | Caution: Short-Term or Emergency Use Only | Short-term exposure only; avoid continuous pressurized service | Report |
| Polypropylene | C-Fair | Caution: Limited / Intermittent Service Only | Ambient intermittent contact only; do not pressurize | 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 37% vs Viton: A – Excellent (Fully Compatible)
Summary Verdict: Viton® (FKM Fluoroelastomer) is rated A-Excellent (Safe for Continuous Industrial Service) when exposed to Hydrochloric Acid 37% (Formula: HCl (37% aq. Reagent Grade), CAS: 7647-01-0). Approved for continuous fluid handling, bulk storage, valves, and sealing assemblies.
Quick Engineering Specifications
| Chemical Media | Hydrochloric Acid 37% |
|---|---|
| Chemical Formula | HCl (37% aq. Reagent Grade) |
| CAS Registry Number | 7647-01-0 |
| Chemical Classification | Halogenated / Mineral Acid |
| Wetted Material | Viton® (FKM Fluoroelastomer) (High-Performance Fluorinated Elastomer) |
| Official Resistance Rating | A – Excellent (Fully Compatible) (Grade A) |
| Recommended Temperature Window | Ambient to elevated operating temperatures within standard material limits (Material limit: -15°F to 400°F (-26°C to 204°C)) |
| Top Grade-A Alternatives | PTFE, PVC, PVDF |
| Data Verification Status | Verified against Cole-Parmer, ISM & Graco industrial chemical resistance charts. |
Chemical & Material Interaction Analysis
Hydrochloric Acid 37% 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 Viton, 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 (Viton): Exceptional resistance to aliphatic and aromatic hydrocarbons, petroleum oils, concentrated mineral acids, and halogenated solvents at elevated temperatures. However, severely attacked by polar oxygenated solvents (acetone, MEK, ethyl acetate, THF), anhydrous ammonia, primary amines, and hot concentrated caustic soda via dehydrofluorination.
- Application Scope: Common wetted components include O-ring static/dynamic seals, pump diaphragms, valve seats, flange gaskets, and chemical transfer hose liners.
Cross-Material Compatibility Comparison for Hydrochloric Acid 37%
To help you select the longest-lasting piping, valve lining, or O-ring seal for Hydrochloric Acid 37%, the table below compares Viton against 8 other common industrial engineering materials:
| Wetted Material | Compatibility Rating | Service Recommendation | Material Temp Range |
|---|---|---|---|
| Polypropylene (PP Homopolymer & Copolymer) | C-Fair | Caution: Limited / Intermittent Service Only | 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) (Current Page) | 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) | B-Good | Acceptable with Operating Controls | -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) | C-Fair | Caution: Limited / Intermittent Service Only | -40°F to 250°F (-40°C to 121°C) |
| HDPE (High-Density Polyethylene) | C1-Fair | Caution: Short-Term or Emergency Use Only | -60°F to 140°F (-51°C to 60°C) |
Frequently Asked Questions (FAQ)
Is Viton compatible with Hydrochloric Acid 37%?
Viton is rated A-Excellent (Safe for Continuous Industrial Service) with Hydrochloric Acid 37% (Formula: HCl (37% aq. Reagent Grade), 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 37%?
If Viton does not meet your temperature or pressure requirements for Hydrochloric Acid 37%, the highest-rated Grade A alternatives are PTFE, PVC, PVDF. Always verify O-ring elastomers and metallic fasteners separately before full-scale deployment.
Technical Engineering FAQs: Hydrochloric Acid 37% vs Viton
Click any question below for chemical failure-mode specifics, thermal derating limits, and material selection rules: