Cleaning Power of Solstice PF with Methanol

Solstice® PF-2A is an azeotropic mixture of Solstice PF (98 weight percent) and methanol (2 weight percent) that balances cleaning performance with environmental and safety performance. It combines the cleaning power of Solstice PF with methanol, which yields an azeotropic fluid that can solubilize ionic contaminants in hydrocarbon-based oils and water soluble soils.

Some benefits include:

  • Excellent and fast cleaning
  • Non-volatile residue (NVR): < 10 ppm
  • Good solvency towards cutting oils
  • Low surface tension provides good wetting of parts
  • Good stability and materials compatibility
  • Considered a replacement for HCFC, HFC, TCE, nPB, HFE, and others


Based on hydrofluoro-olefin (HFO) technology, Solstice PF-2A is a highly effective cleaning solution. It is nonflammable (ASTM E681 and AU E11), has favorable toxicity properties, and an ultra-low global warming potential of 1. It also exhibits low surface tension and a high degree of solvency, making it suitable for cleaning tight spaces.

As an azeotropic blend, Solstice PF-2A will not segregate by distillation in a standard vapor and solvent degreaser process. The solvent has been shown to provide excellent cleaning performance in degreasing equipment with low loss rates.


Solstice PF-2A is an azeotrope specifically formulated to remove polar soils, such as emulsified oils and inks. Some of its benefits include:

  • Superior wetting for excellent cleaning of tight spaces
  • Swiftly cleans parts with small, intricate channels
  • Compatible with a large number of commonly-used polymers and elastomers, such as PET, PTFE, polycarbonate, DuPont™ Viton®, and DuPont™ Neoprene
  • Compatible with common metals i.e. stainless steel, cold rolled steel, galvanized steel, copper, iron and aluminum, with or without excess water
  • No stabilizers needed
  • Vapor pressure facilitates rapid drying of cleaned parts
  • Can be recovered or recycled by simple flash distillation

Cleaning Power

Solstice PF-2A is specifically formulated to remove polar soils, such as emulsified oils and inks. It is very effective in cleaning a wide variety of soils, including:

  • Mineral oils
  • Ionic contaminants
  • Silicone oils and greases
  • Heavy greases
  • Cutting oils
  • Emulsified oils
  • Fingerprints


Favorable health, safety, and environmental attributes:

  • Nonflammable (ASTM E-681 and EU A11)
  • Ultra-low GWP of 1
  • Listed under the Significant New Alternatives Policy (SNAP) per U.S. EPA
  • Non-ozone-depleting
  • VOC-exempt (per U.S. EPA and California’s South Coast Air Quality Management District)
  • Low order of toxicity: OEL-800 ppm (WEEL)
  • Very low MIR and POCP values