SMT Equipment

AQUANOX® A4625 - Aqueous In-Line Cleaning Solution

Company Information:

A leading supplier of precision cleaning chemistries to the worldwide electronics, metal finishing, medical, semiconductor, and optical industries.

Nashville, Tennessee, USA


  • Phone 615-831-0888
  • Fax 615-831-0889

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AQUANOX® A4625 - Aqueous In-Line Cleaning Solution

AQUANOX® A4625 - Aqueous In-Line Cleaning Solution


AQUANOX® A4625 - Aqueous In-Line Cleaning Solution


Cleaning Agents

Offered by:

KYZEN Corporation


AQUANOX® A4625 - Aqueous In-Line Cleaning Solution Description:

AQUANOX® A4625 is a versatile aqueous cleaning chemistry designed to clean the latest lead-free residues while providing brilliant mirrored solder finishes.

Easy to use, AQUANOX® A4625 is environmentally friendly, has a long tank life and is safe for multi-pass applications.

  • Successful at Low Concentrations and Low Temperatures
  • Eco Friendly; Low VOC Solution
  • Effective on All Flux Types Including No-Clean and Pb-Free Residues
  • Provides Low Cost of Ownership
  • Excellent Material Compatibility

AQUANOX® A4625 is a highly dispersive cleaning agent engineered to remove lead-free no-clean flux residues. AQUANOX® A4625 is formulated with high dispersive, moderate polarity, and moderate hydrogen bonding forces. AQUANOX® A4625 is effective on greater than 90% of the solder pastes in production today. A4625 is commonly used to clean rosin and no-clean flux residue types but will also clean water soluble soils.

AQUANOX® A4625 solvency make-up is engineered with a mixture of oxygenated alcohol-ether compounds, which are partially soluble in water. The solvents were selected on their ability to dissolve rosin and resin structures. The solvents provide a unique hydrophobic (rosin/resin loving) and hydrophobic (water loving) balance. The operating concentration range for water soluble soils is 5-10%, 10-15% for rosin-based soils, and 13-18% for no-clean soils.

The concentrated AQUANOX® A4625 contains no water or inorganic salts. The high level of solvency within the A4625 concentrate provides high dispersive values at the dilution concentration ranges. The solvent micro-droplets at operating wash temperatures ranging from 130-155°F provide high affinity for non-polar resin and rosin structures.

AQUANOX® A4625 contains low levels of a polar organic reactive solvent with one side of the molecule inducing the ion-dipole on non-polar resins and the other portion of the molecule providing dispersive forces. These unique properties provide affinity for both ionic and non-ionic solutes. Functional additives are added to reduce interactions on metallic alloys, anodized aluminum, and conversion coatings. The pH ranges from 9.5-10.5 dependent on the in use concentration.

AQUANOX® A4625 is designed for use in spray-in-air cleaning equipment. The operating concentration varies with the soil type. A4625 is a low foam cleaning agent that is commonly monitored based on the solvent / water ratio. Wash time is a function of the soil, component geometry and Z-axis gap. Lower Z-axis gaps under components typically require longer wash times.


AQUANOX® A4625 has proven compatible with all materials commonly used in electronic assembly manufacturing and cleaning processes. For specific compatibility information, please contact your Kyzen representative.


pH (10 g/L) 10.3-11.3
Flash Point 212°F~100°C
Boiling Point 338°F~170°C
Water Soluble Complete
VOC, @10% 94.2 g/L

Typical Processes:

Application In-Line
Operating Concentration <15%
Temperature <140°F~60°C
Rinse Hot DI Water
Dry Hot Air


AQUANOX® A4625 is available in 1, 5, and 55 gallon (5, 25, 200 liters) containers.

Storage and Handling:

  • Packaged in Polyethylene Containers
  • Store at 5-30°C/41-86°F in Original Container
  • Standard Chemical Handling Practices Required
  • Shelf Life of 5 Years, in Sealed Containers of 5 gallons / 25 liters or More

Environmental Regulations:

AQUANOX® A4625 is a non-hazardous, biodegradable aqueous solution. It contains no CFC’s or HAP’s.

Free Cleaning Trials and Process Optimizations:

Kyzen will conduct free trials at your factory or one of our global Applications Laboratories in North America, Asia or Europe. Our engineers and lab technicians have developed, optimized and evaluated thousands of customer cleaning processes over the last twenty years. Kyzen’s Applications Labs are unrivaled in the industry and staffed with experts that have an average of thirty years technical experience.

Aquanox® Family of Cleaning Chemistries

KYZEN’s Aquanox line of chemistries are concentrated aqueous cleaning chemistries designed for the Electronic Assembly, Aerospace and Automotive industries.  Each product in the line has been specially formulated for a variety of cleaning processes and purposes such as cleaning circuit boards and printed circuit board cleaning.

AQUANOX® A4625 - Aqueous In-Line Cleaning Solution was added in Jul 2015

AQUANOX® A4625 - Aqueous In-Line Cleaning Solution has been viewed 2966 times

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