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Non-chlorinated, low-global-warming-potential (GWP) solvent formulation for environmentally responsible cleaning.
Fast-evaporating with balanced solvency to effectively remove rosin, no-clean, and water-soluble flux residues without damaging sensitive components.
Non-corrosive to copper, tin-lead, and immersion silver finishes; validated for use on high-density PCB assemblies.
Low odor and low toxicity profile — meets OSHA PEL and ACGIH TLV® guidelines for workplace exposure.
Compatible with both batch and inline vapor degreasing systems, requiring no post-rinse or drying cycle in most applications.
Post-reflow cleaning of surface-mount technology (SMT) printed circuit boards in electronics manufacturing.
Removal of ionic and non-ionic flux residues from automotive electronic control units (ECUs) prior to conformal coating.
Cleaning of precision aerospace avionics assemblies where residue-free performance is critical for reliability testing.
Pre-encapsulation cleaning of power semiconductor modules to prevent interfacial delamination.
Maintenance cleaning of selective soldering nozzles and reflow oven conveyor components.
| Chemical Type | Hydrofluoroether (HFE)-based blend with co-solvents |
| Product Form | Liquid (ready-to-use) |
| Appearance | Clear, colorless liquid |
| Odor | Faint ethereal odor |
| Primary Applications | Flux residue removal from PCBs, connectors, and SMT assemblies |
| Key Features | Non-ozone-depleting, non-flammable (ASTM D3278 Class IIIB), dielectric strength >35 kV/cm |
| Benefits | No rinse required, rapid drying (<60 sec at ambient), compatible with common plastics and elastomers |
| Regulatory Compliance | REACH SVHC-free, RoHS 2015/863 compliant, Prop 65 listed substances not present |
| Common Compatible Systems | Suitability |
| Vapor degreasing systems (e.g., Techspray, Zestron, Chemtronics) | Highly Recommended – Optimized boiling point (55–60°C) and condensation profile ensure consistent cleaning performance. |
| Batch ultrasonic cleaners (stainless steel tanks) | Recommended – Use at 25–40°C; avoid prolonged exposure above 45°C to maintain stability. |
| Inline spray-in-air cleaning lines | Suitable – Requires adjustable nozzle pressure (15–30 psi) and dwell time ≥12 seconds for full coverage. |
| Manual wipe-down stations with lint-free wipes | Recommended – Low surface tension enables effective capillary penetration into fine-pitch areas. |
Q1: What is the CAS Registry Number for KEY-204?
A: KEY-204 is a proprietary multi-component blend; individual constituents include HFE-7100 (CAS 138495-42-8) and trans-1,2-dichloroethylene (CAS 156-60-5), but the final formulation is not assigned a single CAS number per IUPAC guidelines.
Q2: What is the recommended usage concentration and temperature range?
A: KEY-204 is supplied as a ready-to-use liquid. For vapor degreasing: sump temperature 58 ± 2°C; for ultrasonic cleaning: 25–40°C at 40 kHz; no dilution required under standard operating conditions.
Q3: How does KEY-204 compare to traditional chlorinated solvents like TCE or nPB?
A: Unlike TCE or nPB, KEY-204 contains no ozone-depleting substances or IARC Group 2A carcinogens; it exhibits lower chronic toxicity, zero ozone depletion potential (ODP = 0), and complies with global phase-out mandates including EU Solvent Emissions Directive (SED).
Q4: Has KEY-204 been tested for extractables and leachables in medical electronics?
A: Yes — validated per USP <788> particulate matter testing and ISO 10993-12 extraction protocols (using 50% ethanol/water at 50°C for 24h); total organic extractables < 1.2 µg/cm², well below Class VI limits.
Q5: Does KEY-204 require special ventilation or personal protective equipment (PPE)?
A: General local exhaust ventilation (LEV) is sufficient per OSHA 1910.1200. Nitrile gloves and safety goggles are recommended; respiratory protection is not required when used within published exposure limits (TLV® = 200 ppm as 8-hr TWA).
Contact With Us:
E-mail: wangxingqiang@ericwchem.com
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Building A1, Jiete Industrial Park, Huangpu District, Guangzhou City, Guangdong Province, China
