ASTM OIL NO. 1 Chemical compatibility with O-rings, rubbers, & plastics

ASTM Oil No. 1, also known as ASTM Reference Oil No. 1 or IRM 901 test oil, is a standardized petroleum-based fluid used for elastomer and material compatibility testing under ASTM specifications. It is commonly applied in evaluating O-rings, rubber compounds, and gaskets for changes in volume, hardness, and tensile properties after oil exposure. Frequently used in engine and lubrication performance assessments, ASTM Oil No. 1 requires proper handling, storage, and appropriate PPE to maintain safety and accurate rubber testing results.

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