SMT Equipment

AQUANOX® A4651US - Low pH Ultrasonic Immersion Cleaner

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® A4651US - Low pH Ultrasonic Immersion Cleaner

AQUANOX® A4651US - Low pH Ultrasonic Immersion Cleaner


AQUANOX® A4651US - Low pH Ultrasonic Immersion Cleaner


Cleaning Agents

Offered by:

KYZEN Corporation


AQUANOX® A4651US - Low pH Ultrasonic Immersion Cleaner Description:

AQUANOX® A4651US is a low pH aqueous cleaning solution designed exclusively for use in ultrasonic immersion cleaning systems.

AQUANOX® A4651US will provide brilliant solder joints with no sump side additives and cleans exceptionally well on the latest flux formulations in electronic assemblies.

  • Effective on All Flux Types
  • Produces Mirrored Solder Joints
  • Consistent Successful Cleaning Results with Minimal Bath Monitoring
  • Multi Metal Safe including Aluminum and Copper
  • Easy to use with a Low pH

AQUANOX® A4651US is a batch cleaning product specifically designed to remove flux residues from printed circuit assemblies while reducing the cavitation threshold. The engineered cleaning solution creates a strong affinity for post soldering flux residues using a combination of water loving and oil loving properties. The low surface tension and recommended operating temperature range (50-65°C) creates lower ultrasonic pressure amplitudes needed to achieve uniform cavitation.

AQUANOX® A4651US is effective at cleaning most lead-free and tin-lead no-clean, rosin-based, and water-soluble reflowed flux residues on production assemblies. Dependent on the flux type, AQUANOX® A4651US can be used “as is” or diluted. For most applications, A4651US is run at dilution rates in water of 15-30% concentration. Wash time is a function of wash temperature and ultrasonic cavitation.

Selecting the proper frequency for a particular application is critical. As components decrease in size, higher frequency levels provide milder scrubbing intensity and less potential for part damage. Sweep frequency changes the speed and magnitude of energy by allowing energy bursts along with soak periods. The combined effects allows for both chemical and mechanical energies needed to remove residues under bottom termination components.  These effects improve cleaning performance on highly dense assemblies.

AQUANOX® A4651US is engineered with a mixture of oxygenated and polar organic reactive solvents. Functional additives are added to protect metallic surfaces from chemical attack, surface tension reduction to improve wetting and penetration under low gap components, and reduce foam propagation. The features engineered into A4651US make for a highly effective ultrasonic cleaning product. The product is low in odor and contains no hazardous materials. The product has a wide material compatibility window on printed circuit boards, components, labels and metallic surfaces.


AQUANOX® A4651US 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): 9.7
  • Flash Point: None to Boiling
  • Boiling Point: 209°F~99°C
  • Water Soluble: Complete
  • VOC, @10%: 55.1 g/L

Typical Processes:

  • Application: Ultrasonic
  • Operating Concentration: Eutectic <25%, Lead Free <30%
  • Temperature: <150°F~66°C
  • Rinse: Hot DI Water
  • Dry: Hot Air


  • 1, 5, and 55 Gallon Containers
  • Asia & Europe: 5, 25 and 200 Liter Containters

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® A4651US 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® A4651US - Low pH Ultrasonic Immersion Cleaner was added in Aug 2015

AQUANOX® A4651US - Low pH Ultrasonic Immersion Cleaner has been viewed 1752 times

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