MIDEL® 7131 is a dielectric insulating fluid for transformers, tap changers, and electrical control equipment. It is a synthetic ester-based fluid specifically formulated to provide a safe, superior alternative to traditional fluid and dry-type transformers that can be used in both outdoor and indoor locations. MIDEL 7131 offers increased fire safety, greater environmental protection, and improved moisture tolerance. MIDEL 7131 conforms to IEC 61099:1992 “Specifications for Unused Synthetic Organic Esters for Electrical Purposes.” It is classified as type T1, a halogen-free pentaerythritol ester.