AQUANOX® A4625N – Cleaning Agent for Removing Flux Residues After Soldering
AQUANOX® A4625N from KYZEN is a high-performance water-based cleaning agent developed for effective removal of modern lead-free flux residues in electronics manufacturing. The product is particularly suitable for cleaning printed circuit boards (PCBs), electronic assemblies, and components after soldering processes where high demands are placed on cleanliness, process stability, and reliability.
A4625N is designed for use in spray-in-air washing systems and is effective against more than 90% of the solder pastes used in the electronics industry today. The product removes no-clean flux, rosin-based flux residues, and water-soluble contaminants, while leaving solder joints with a beautiful, bright, and mirror-like finish.
Effective Cleaning of Lead-Free and No-Clean Flux
Modern electronics manufacturing places increasingly high demands on the cleaning process. Tightly packed components, low stand-off heights, and advanced soldering processes necessitate a cleaning chemistry that can penetrate under components and effectively dissolve even difficult flux residues.
AQUANOX A4625N is developed with a unique combination of solvents that have affinity for resin-based flux residues while also functioning effectively in water-based processes. This provides a high cleaning effect on both ionic and non-ionic contaminants.
The product is low-foaming, has a long bath life, and is suitable for continuous operation in both batch and in-line cleaning processes.
Lower Operating Costs and High Process Stability
A4625N is developed with a focus on low total cost of ownership. The product works effectively at relatively low concentrations and temperatures, which can reduce both chemical and energy consumption. At the same time, its long bath life contributes to fewer bath changes and less waste management.
The optimized stabilizer package makes the product suitable for multi-pass applications where process stability and consistent results are crucial for product quality.
Suitable for Electronics Manufacturing
AQUANOX A4625N is compatible with the materials typically used in electronics manufacturing, including copper, gold, silver, stainless steel, and the most commonly used lead-free solder alloys such as SAC and SnCu alloys.
The product is typically used for:
• Cleaning printed circuit boards after reflow soldering
• Removing no-clean flux residues
• Cleaning lead-free solder paste
• Cleaning electronic assemblies
• High-reliability production in industry, energy, medical technology, and defense
• In-line and batch washing systems for PCB cleaning
Environmentally Friendly Cleaning Chemistry with Focus on Compliance
AQUANOX A4625N is developed with a focus on both the environment and the work environment. The product is RoHS-compliant and halogen-free, making it suitable for companies with high demands for documentation and compliance.
The low VOC burden and effective cleaning at relatively low concentrations also contribute to a more sustainable cleaning process without compromising cleaning results.
Benefits of AQUANOX A4625N
• Effective against modern lead-free flux residues
• Cleans more than 90% of the solder pastes on the market
• Suitable for no-clean, rosin-based, and water-soluble fluxes
• Provides bright and mirror-like solder joints
• Low-foaming formulation
• Long bath life
• Suitable for spray-in-air cleaning systems
• Compatible with most materials in electronics manufacturing
• RoHS-compliant and halogen-free
• Low total cost of ownership
Technical Specifications
Manufacturer: KYZEN
Product Name: AQUANOX® A4625N
Product Type: Water-based cleaning agent for electronics manufacturing
Application: Cleaning of PCBs and electronic assemblies after soldering
Flux Types: No-clean, rosin-based, and water-soluble fluxes
Process: Spray-in-air cleaning systems
Recommended Concentration: 5-25% depending on contamination type
Recommended Process Temperature: 55-65 °C
pH (10 g/L): 9.8
Boiling Point: 157 °C
VOC at 10% concentration: 91.6 g/L
Color: Yellow
Odor: Mild
RoHS Compliant: Yes
Halogen-Free: Yes