KESTER 2331-ZX Soldering Flux
Harmonization Code : 29051200 | Propan-1-ol (propyl alcohol) and propan-2-ol (isopropyl alcohol)

Main features
- Neutral pH
- Minimal foaming
- Low-odor emission
Product Description
Kester 2331-ZX solder lfux has an organic acid water-soluble chemistry, formulated specifically for soldering circuit board assemblies. Its neutral pH formulation delivers exceptional performance and cleanliness, making 2331-ZX a trusted choice across multiple industries.
Product Key Features
- Neutral pH formulation, ensuring ionic cleanliness.
- Minimal foaming
- Low-odor emission
- Classified as ORH1 per industry standards.
Applications
- Ideal for high-performance and sensitive circuit assemblies.
Note: Due to changes in REACH Regulations, this product is no longer sold into Europe or to European customers.
Packaging
TDS, SDS & Technical Documents
- 2331-ZX Soldering Flux and Flux Pen TDS
- 2331-ZX Soldering Flux and Flux Pen SDS
Technical Specifications
General Properties
Thermal Properties
Additional Information
Flux Application
2331-ZX can be applied to circuit boards by a dip, foam or wave process. An air knife after the flux tank is recommended to remove excess flux from the circuit board and prevent dripping on the preheater surface.
Recently viewed products

OPTOLINQ GT-W170MG | White Epoxy Mold Compound
- High light reflectance and excellent light shielding
- Low yellowing at high temperature
- High MSL performance

BMI-3000 Gel Bismaleimide (Imide Extended)
- Superior thermal stabilty
- Hydrophobic
- Toughener

JNC PI-6322-001 | Insulating Polyimide Ink
- Thermal Curable
- Heat Resistance
- Low Temperature Curing

PIT1N-DCS | 1-mil Die Cut Polyimide (Kapton) Film | Squares

PI-6324-001 | Insulating Polyimide Ink
- Thermal Curable
- Heat Resistance
- Low Temperature Curing