Surfynol 485 is a non-ionic surfactant derived from ethoxylated acetylenic glycol, produced by the addition of 85% ethylene oxide (30 mol EO) to Surfynol 104 (tetramethyl decynediol). Its unique molecular structure provides ultra-low dynamic/static surface tension, high hydrophilicity (HLB = 17), and non-hemolytic properties, making it a key functional additive in in vitrodiagnostic reagents for achieving efficient wetting, stabilizing latex systems, and optimizing whole blood detection performance.
•Ultra-Low Surface Tension: Rapidly reduces liquid-solid interfacial tension, promoting uniform spreading and penetration of reagents on hydrophobic surfaces (e.g., nitrocellulose membranes, plastic microplates).
•Non-Hemolytic Property: Acts gently on red blood cell membranes, avoiding hemolysis-induced interference in optical detection (e.g., direct lateral flow or colorimetry with whole blood).
•Enzyme Compatibility: Does not disrupt enzyme activity, making it suitable for enzyme-containing reaction systems (e.g., ELISA, chemiluminescence) and improving detection stability.
•Low Foaming and Defoaming: Suppresses foam generation during reagent mixing or automated pipetting, ensuring accurate signal reading.
•Latex Particle Stabilization: Prevents aggregation of latex/colloidal gold particles through synergistic steric hindrance and electrostatic repulsion, enhancing the uniformity of turbidity signals.
•Lateral Flow Immunoassay Strips: Added to the sample pad treatment solution to accelerate the penetration of whole blood/serum, inhibit red blood cell retention, and reduce background interference.
•Latex-Enhanced Immunoturbidimetry: Pre-mixed in latex microparticle suspensions to enhance particle dispersibility and improve detection sensitivity and linear range.
•Direct Whole Blood Detection Reagents: Serves as a component of red blood cell adsorption materials for gentle plasma-cell separation, eliminating bias from high-hematocrit (HCT) samples.
•Microfluidic Chip Wetting Agent: Coated onto hydrophobic microchannels to optimize the flow uniformity of blood samples and prevent cell clogging or bubble retention.
•Enzyme Reaction System Stabilizer: Added to enzyme preservation solutions to reduce enzyme inactivation during lyophilization/reconstitution and extend reagent shelf life.
Surfynol® is manufactured by Air Products.