Sulfuric Acid (93%) vs EPDM Compatibility
Verified chemical resistance rating (Incompatible — Immediate Failure Risk), thermal boundary limits (Not recommended at any temperature or concentration), and material specification guide for EPDM exposed to Sulfuric Acid (93%) in Strong Oxidizing / Mineral Acid service.
Sulfuric Acid (93%) vs EPDM: D-Severe Effect
Exposing EPDM to Sulfuric Acid (93%) (Formula: H2SO4 (93% Technical Grade), CAS: 7664-93-9) carries an official rating of D-Severe Effect (Incompatible — Immediate Failure Risk). Maximum recommended thermal operating limit: Not recommended at any temperature or concentration. Best Grade A alternative materials for continuous or high-temperature service: Viton, PTFE, PVC, PVDF.
Technical Specifications and Operating Parameters
| Chemical Medium | Sulfuric Acid (93%) |
|---|---|
| Chemical Formula | H2SO4 (93% Technical Grade) |
| CAS Registry Number | 7664-93-9 |
| Chemical Functional Class | Strong Oxidizing / Mineral Acid |
| Wetted Material | EPDM |
| Official Resistance Rating | D-Severe Effect (Grade D) |
| Engineering Service Verdict | Incompatible — Immediate Failure Risk |
| Max Temp and Concentration Limit | Not recommended at any temperature or concentration |
| Best Grade A Alternatives | Viton, PTFE, PVC, PVDF |
| Backtest and Audit Verification | Verified against Cole-Parmer, ISM, Graco & CP Lab Safety industrial chemical resistance charts. |
Sulfuric Acid (93%) Cross-Material Comparison Matrix (9 Materials)
Direct benchmark ratings across all 9 reference industrial materials for Sulfuric Acid (93%):
| Material Name | Compatibility Rating | Service Verdict | Temperature Limit | Datasheet |
|---|---|---|---|---|
| Buna-N | D-Severe Effect | Incompatible — Immediate Failure Risk | Not recommended at any temperature or concentration | Report |
| EPDM | D-Severe Effect | Incompatible — Immediate Failure Risk | Not recommended at any temperature or concentration | Report |
| HDPE | B-Good | Acceptable with Operating Controls | Ambient service (72°F / 22°C) preferred; monitor wear in continuous service | Report |
| Polypropylene | C1-Fair | Caution: Short-Term or Emergency Use Only | Short-term exposure only; avoid continuous pressurized service | Report |
| PTFE | A-Excellent | Safe for Continuous Industrial Service | Ambient to elevated operating temperatures within standard material limits | Report |
| PVC | A1-Excellent | Safe for Continuous Industrial Service | Up to 120°F (49°C) verified; up to material thermal limit in non-pressurized service | Report |
| PVDF | A1-Excellent | Safe for Continuous Industrial Service | Up to 120°F (49°C) verified; up to material thermal limit in non-pressurized service | Report |
| Stainless Steel | C-Fair | Caution: Limited / Intermittent Service Only | Ambient intermittent contact only; do not pressurize | 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
Sulfuric Acid (93%) vs EPDM: D – Severe Effect (Do Not Use)
Summary Verdict: EPDM (Ethylene Propylene Diene Monomer) is rated D-Severe Effect (Incompatible — Immediate Failure Risk) when exposed to Sulfuric Acid (93%) (Formula: H2SO4 (93% Technical Grade), CAS: 7664-93-9). PROHIBITED for wetted service. Immediately substitute with an A-rated material shown in the cross-material comparison table below.
Quick Engineering Specifications
| Chemical Media | Sulfuric Acid (93%) |
|---|---|
| Chemical Formula | H2SO4 (93% Technical Grade) |
| CAS Registry Number | 7664-93-9 |
| Chemical Classification | Strong Oxidizing / Mineral Acid |
| Wetted Material | EPDM (Ethylene Propylene Diene Monomer) (Synthetic Polar-Service Elastomer) |
| Official Resistance Rating | D – Severe Effect (Do Not Use) (Grade D) |
| Recommended Temperature Window | Not recommended at any temperature or concentration (Material limit: -60°F to 300°F (-51°C to 149°C)) |
| Top Grade-A Alternatives | Viton, PTFE, PVC, PVDF |
| Data Verification Status | Verified against Cole-Parmer, ISM, Graco & CP Lab Safety industrial chemical resistance charts. |
Chemical & Material Interaction Analysis
Sulfuric Acid (93%) is classified as a strong oxidizing / mineral acid (corrosive proton attack combined with strong oxidative potential). Used in chemical synthesis, metal pickling, pH neutralization, and industrial etching. When selecting wetted components for EPDM, engineers must account for both concentration-dependent chemical attack and thermal stress:
- Reaction & Failure Mechanism: Causes rapid, catastrophic material failure—including severe dissolution, stress cracking, extreme volumetric blowout (>25% swell), or rapid pitting corrosion (>50 mpy).
- Material Profile (EPDM): Outstanding resistance to polar fluids including ketones (acetone, MEK), alcohols, glycols, phosphate ester hydraulic fluids (Skydrol), alkalis, and dilute acids. However, exhibits rapid, catastrophic volumetric swelling and softening when exposed to petroleum oils, gasoline, diesel, kerosene, aliphatic/aromatic hydrocarbons, and chlorinated solvents.
- Application Scope: Common wetted components include butterfly valve liners, O-rings, sanitary Tri-Clamp gaskets, caustic dosing hoses, and water/wastewater treatment seals.
Cross-Material Compatibility Comparison for Sulfuric Acid (93%)
To help you select the longest-lasting piping, valve lining, or O-ring seal for Sulfuric Acid (93%), the table below compares EPDM against 8 other common industrial engineering materials:
| Wetted Material | Compatibility Rating | Service Recommendation | Material Temp Range |
|---|---|---|---|
| Polypropylene (PP Homopolymer & Copolymer) | C1-Fair | Caution: Short-Term or Emergency Use Only | 32°F to 180°F (0°C to 82°C) |
| 316 / 304 Austenitic Stainless Steel | C-Fair | Caution: Limited / Intermittent Service Only | -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) (Current Page) | D-Severe Effect | Incompatible — Immediate Failure Risk | -60°F to 300°F (-51°C to 149°C) |
| PVC Type I (Unplasticized Polyvinyl Chloride / uPVC) | A1-Excellent | Safe for Continuous Industrial Service | 32°F to 140°F (0°C to 60°C) |
| PVDF (Kynar® / Polyvinylidene Fluoride) | A1-Excellent | Safe for Continuous Industrial Service | -40°F to 280°F (-40°C to 138°C) |
| Buna-N (Nitrile / NBR Elastomer) | D-Severe Effect | Incompatible — Immediate Failure Risk | -40°F to 250°F (-40°C to 121°C) |
| HDPE (High-Density Polyethylene) | B-Good | Acceptable with Operating Controls | -60°F to 140°F (-51°C to 60°C) |
Frequently Asked Questions (FAQ)
Is EPDM compatible with Sulfuric Acid (93%)?
EPDM is rated D-Severe Effect (Incompatible — Immediate Failure Risk) with Sulfuric Acid (93%) (Formula: H2SO4 (93% Technical Grade), CAS: 7664-93-9). Causes rapid, catastrophic material failure—including severe dissolution, stress cracking, extreme volumetric blowout (>25% swell), or rapid pitting corrosion (>50 mpy). PROHIBITED for wetted service. Immediately substitute with an A-rated material shown in the cross-material comparison table below.
What is the best alternative material for handling Sulfuric Acid (93%)?
If EPDM does not meet your temperature or pressure requirements for Sulfuric Acid (93%), the highest-rated Grade A alternatives are Viton, PTFE, PVC, PVDF. Always verify O-ring elastomers and metallic fasteners separately before full-scale deployment.
Technical Engineering FAQs: Sulfuric Acid (93%) vs EPDM
Click any question below for chemical failure-mode specifics, thermal derating limits, and material selection rules: