Dichloromethane (DCM) vs HDPE Compatibility
Verified chemical resistance rating (Caution: Short-Term or Emergency Use Only), thermal boundary limits (Short-term exposure only; avoid continuous pressurized service), and material specification guide for HDPE exposed to Dichloromethane (DCM) in Halogenated Hydrocarbon / Refrigerant service.
Dichloromethane (DCM) vs HDPE: C1-Fair
Exposing HDPE to Dichloromethane (DCM) (Formula: CH2Cl2, CAS: 75-09-2) carries an official rating of C1-Fair (Caution: Short-Term or Emergency Use Only). Maximum recommended thermal operating limit: Short-term exposure only; avoid continuous pressurized service. Best Grade A alternative materials for continuous or high-temperature service: PTFE.
Technical Specifications and Operating Parameters
| Chemical Medium | Dichloromethane (DCM) |
|---|---|
| Chemical Formula | CH2Cl2 |
| CAS Registry Number | 75-09-2 |
| Chemical Functional Class | Halogenated Hydrocarbon / Refrigerant |
| Wetted Material | HDPE |
| Official Resistance Rating | C1-Fair (Grade C) |
| Engineering Service Verdict | Caution: Short-Term or Emergency Use Only |
| Max Temp and Concentration Limit | Short-term exposure only; avoid continuous pressurized service |
| Best Grade A Alternatives | PTFE |
| Backtest and Audit Verification | Verified against Cole-Parmer, ISM, Graco & CP Lab Safety industrial chemical resistance charts. |
Dichloromethane (DCM) Cross-Material Comparison Matrix (9 Materials)
Direct benchmark ratings across all 9 reference industrial materials for Dichloromethane (DCM):
| 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 | C1-Fair | Caution: Short-Term or Emergency Use Only | Short-term exposure only; avoid continuous pressurized 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 | D-Severe Effect | Incompatible — Immediate Failure Risk | Not recommended at any temperature or concentration | Report |
| PVDF | B1-Good | Acceptable with Routine Inspection | Up to 120°F (49°C) with minor absorption/corrosion allowance | Report |
| Stainless Steel | B-Good | Acceptable with Operating Controls | Ambient service (72°F / 22°C) preferred; monitor wear in continuous service | Report |
| Viton | B-Good | Acceptable with Operating Controls | Ambient service (72°F / 22°C) preferred; monitor wear in continuous service | Report |
Chemical and Material Interaction Analysis
Engineering Compatibility Verdict
Dichloromethane (DCM) vs HDPE: C1 – Fair (Moderate Effect up to 120°F / 49°C)
Summary Verdict: HDPE (High-Density Polyethylene) is rated C1-Fair (Caution: Short-Term or Emergency Use Only) when exposed to Dichloromethane (DCM) (Formula: CH2Cl2, CAS: 75-09-2). Not recommended for permanent pressurized piping or critical O-ring seals. Use only for short-duration flushing or non-critical gravity drain lines.
Quick Engineering Specifications
| Chemical Media | Dichloromethane (DCM) |
|---|---|
| Chemical Formula | CH2Cl2 |
| CAS Registry Number | 75-09-2 |
| Chemical Classification | Halogenated Hydrocarbon / Refrigerant |
| Wetted Material | HDPE (High-Density Polyethylene) (Linear Semi-Crystalline Polyolefin Thermoplastic) |
| Official Resistance Rating | C1 – Fair (Moderate Effect up to 120°F / 49°C) (Grade C) |
| Recommended Temperature Window | Short-term exposure only; avoid continuous pressurized service (Material limit: -60°F to 140°F (-51°C to 60°C)) |
| Top Grade-A Alternatives | PTFE |
| Data Verification Status | Verified against Cole-Parmer, ISM, Graco & CP Lab Safety industrial chemical resistance charts. |
Chemical & Material Interaction Analysis
Dichloromethane (DCM) is classified as a halogenated hydrocarbon / refrigerant (high diffusivity and strong non-polar solvent swelling in polyolefins and standard rubbers). Used in vapor degreasing, refrigerant loops, chemical extraction, and polymer manufacturing. When selecting wetted components for HDPE, engineers must account for both concentration-dependent chemical attack and thermal stress:
- Reaction & Failure Mechanism: Induces moderate chemical attack, noticeable elastomeric swelling (10%–20%), loss of tensile modulus, or measurable metal pitting/etching (20–50 mpy).
- 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 Dichloromethane (DCM)
To help you select the longest-lasting piping, valve lining, or O-ring seal for Dichloromethane (DCM), 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) | C1-Fair | Caution: Short-Term or Emergency Use Only | 32°F to 180°F (0°C to 82°C) |
| 316 / 304 Austenitic Stainless Steel | B-Good | Acceptable with Operating Controls | -325°F to 800°F (-198°C to 426°C) |
| Viton® (FKM Fluoroelastomer) | B-Good | Acceptable with Operating Controls | -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) | D-Severe Effect | Incompatible — Immediate Failure Risk | 32°F to 140°F (0°C to 60°C) |
| PVDF (Kynar® / Polyvinylidene Fluoride) | B1-Good | Acceptable with Routine Inspection | -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) (Current Page) | C1-Fair | Caution: Short-Term or Emergency Use Only | -60°F to 140°F (-51°C to 60°C) |
Frequently Asked Questions (FAQ)
Is HDPE compatible with Dichloromethane (DCM)?
HDPE is rated C1-Fair (Caution: Short-Term or Emergency Use Only) with Dichloromethane (DCM) (Formula: CH2Cl2, CAS: 75-09-2). Induces moderate chemical attack, noticeable elastomeric swelling (10%–20%), loss of tensile modulus, or measurable metal pitting/etching (20–50 mpy). Not recommended for permanent pressurized piping or critical O-ring seals. Use only for short-duration flushing or non-critical gravity drain lines.
What is the best alternative material for handling Dichloromethane (DCM)?
If HDPE does not meet your temperature or pressure requirements for Dichloromethane (DCM), the highest-rated Grade A alternatives are PTFE. Always verify O-ring elastomers and metallic fasteners separately before full-scale deployment.
Technical Engineering FAQs: Dichloromethane (DCM) vs HDPE
Click any question below for chemical failure-mode specifics, thermal derating limits, and material selection rules: