OECD TG 115: Surface Tension of Aqueous Solutions
Quantifying interfacial activity to predict environmental spreading and biological interaction.
Surface tension is a fundamental property that describes the cohesive forces at the liquid-gas interface. It dictates how a substance wets surfaces and interacts with biological membranes. At Weshin Inspection Tech we provide high-precision surface tension measurements in strict accordance with OECD Test Guideline 115 (TG 115).
The Importance of Surface Tension Data
Surface tension measurement is a key component of chemical characterization and regulatory compliance:
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Surfactant Identification: A substance is generally considered surface-active if its aqueous solution has a surface tension of less than 60 mN/m.
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Formulation Performance: Crucial for optimizing the wetting, spreading, and adhesion properties of pesticides, detergents, and industrial coatings.
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Ecological Risk Assessment: Evaluating the potential impact on aquatic surface ecosystems and the substance's tendency to form surface films.
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Global Regulatory Compliance: Fulfilling the mandatory physico-chemical data requirements for REACH, agrochemical registrations, and GHS classification.
Our Testing Methodologies
Weshin Inspection Tech utilizes industry-standard instrumentation to deliver accurate results:
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Du Noüy Ring Method: Measuring the maximum force required to lift a platinum-iridium ring from the liquid surface.
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Wilhelmy Plate Method: Measuring the force exerted on a vertically suspended plate, ideal for studying equilibrium surface tension over time.
Why Partner with Weshin Inspection Tech?
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Exceptional Precision: Our equipment provides high-resolution data down to 0.1 mN/m, ensuring reliability for even weakly surface-active substances.
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Rigorous Temperature Control: All measurements are performed in temperature-stabilized environments (standardized at 20°C) to ensure data reproducibility.
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Comprehensive Reporting: We provide detailed test reports including solution concentration, pH, and equilibrium time, fully aligned with international regulatory submission formats.
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