Replacement for Methylene Chloride and TCE
| Part # | Name | Size | Ordering |
|---|---|---|---|
| 2500000055 | BestSolv® nPB | 55 gal. drum |
Product Description
BestSolv® nPB is a powerful solvent for vapor degreasing and general-purpose cleaning, formulated for demanding applications that require residue-free performance. Used in industries such as medical device manufacturing, aerospace, and electronics, it effectively removes oils, greases, and other organic soils from components such as oxygen service lines, precision optics, and high vacuum parts.
As a drop-in alternative to methylene chloride and TCE, BestSolv® nPB offers strong solvency, low surface tension, and excellent material compatibility. This azeotropic formulation can be distilled and reused across multiple cycles, providing reliable cleaning performance in systems that rely on consistent throughput and minimal downtime.
Recommended Applications
- Heavy-duty cleaning solvent
- Vapor degreasing
- Immersion cleaning
- Ultrasonic cleaning
- Effectively cleans contaminants such as cutting oils, stamping oils, and hydraulic and mineral oils
- Powerful cleaning for applications including:
- Oxygen service systems
- Precision optics
- Medical devices
- High vacuum parts
- Electronics
Features and Benefits
- Drop-in replacement for methylene chloride and TCE
- Ideal for vapor degreasing and precision cleaning applications
- Superior cleaning power
- Stable, azeotropic solvent
- Leaves no surface residue
- Compatible with most metals and many plastics and elastomers
- Can be distilled and reused through numerous cycles before needing replacement
- Low surface tension
- Non-flammable
- No flash point
- Very low Global Warming Potential (GWP)
- Very low Ozone Depletion Potential (ODP)
- Replacement for phased-out solvents such as perchloroethylene and 1,1,1-trichloroethane
nPB Phase Out in Progress
Hazard alerts and phase-out actions have been issued for nPB by OSHA, NIOSH and other government agencies. Despite these risks, we recognize that some companies still rely on nPB for economic or short-term production needs—particularly when transitioning to a safer alternative takes time. That’s why we offer BestSolv® nPB as a lower-cost cleaning solvent for approved applications.
- Available now for customers still using nPB-based systems
- Lower cost than most drop-in replacements
- Ideal for organizations nearing transition or needing interim supply
We strongly encourage customers to treat this as a transitional solution only. Our long-term recommendation remains a shift to safer alternatives, such as BestSolv® Bravo.
BestSolv® Bravo replaces nPB
For companies ready to move beyond nPB, BestSolv® Bravo is a heavy-duty cleaning solvent that effectively cleans contaminants such as oils, greases, silicones, flux residues and waxes, while allowing businesses to align with environmental regulations.
- No EPA hazardous designation
- No OSHA hazard alert
- Not subject to European phase-out
- Drop-in performance with no equipment change required
Composition & Properties
| Composition | 1-bromopropane Nitromethane 1,2-Butylene oxide Proprietary stabilizer package |
| Cleaning Performance | Heavy Duty |
| Boiling Point | 158 °F / 70 °C |
| Stability | Azeotropic |
| Vapor Pressure | 134 mmHg @ 25 °C |
| Vapor Density | 4.2 |
| Liquid Density | 1.31 g/mL @ 75 °F |
| Surface Tension | Low |
| Heat Capacity | 0.26 cal/g @ 25 °C |
| Dielectric Strength | 21,000 AC Volts |
| Global Warming Potential (GWP) | Very Low (0.31) |
| Ozone Depletion Potential (ODP) | Very Low (0.005) |
| Volatile Organic Compound (VOC) Designation | 100% (nPB) |
| Flash Point (Closed/Open Cup) | None |
| Kauri-Butanol Value | 130 Kb |
Materials Compatibility
| Metals | Compatible with common metals and alloys, such as steel and stainless steel, aluminum, titanium, nickel and copper. Incompatible with strong alkalies, oxidizers, bases, and reactive metals. |
| Polymers/Plastics* | Compatible with many hard plastics and polymers, including polypropylene, nylon and epoxy resins. Incompatible with ABS, acrylic and polystyrene. |
| Elastomers* | Compatible with some elastomers, including butyl, ethylene propylene, and polyether urethane. Testing is recommended. Incompatible with natural rubber. |
*Material compatibility testing should always be performed with specific contaminants under process-specific conditions. A full compatibility chart is available on request.
Related Products
BestSolv® is distributed exclusively by Best Technology Inc.