Description

Transformer Oil CAS NO 64742-53-6 is a highly refined mineral insulating oil specifically engineered for electrical insulation and cooling in power transformers and other high-voltage equipment. Its primary value lies in its exceptional dielectric strength, thermal stability, and oxidation resistance, which are critical for ensuring the long-term reliability and safety of electrical grids. This product is essential for manufacturers and maintenance providers in the power generation, transmission, and distribution sectors, as well as for industrial facilities operating large electrical apparatus.

Application

• Power Transformer Insulation and Cooling: The primary function as a dielectric fluid and heat transfer medium in oil-filled power and distribution transformers.
• Circuit Breaker and Switchgear Fluid: Used as an arc-quenching and insulating medium in high-voltage circuit breakers and other switchgear.
• Capacitor Impregnation: Employed to impregnate paper and film dielectrics in power capacitors to enhance dielectric performance.
• High-Voltage Cable and Bushing Insulation: Serves as an insulating fluid in some types of high-voltage cables and transformer bushings.
• Hydraulic Fluid for On-Load Tap Changers (OLTC): Acts as both an insulating and operating fluid in the tap-changer mechanisms of transformers.
• Retrofitting and Maintenance: Used for refilling, topping up, or replacing oil during the servicing and refurbishment of existing electrical equipment.

Basic Information

Product Name	Transformer Oil
CAS No.	64742-53-6
Molecular Formula	Complex hydrocarbon mixture
Molecular Weight	N/A (Mixture)
Synonyms	Mineral Insulating Oil; Transformer Fluid; Insulating Oil; Electrical Insulating Oil; Naphthenic Oil (paraffinic/naphthenic base); Dielectric Oil; Unused Mineral Insulating Oil; High-Voltage Transformer Oil; ASTM D3487 Type I/II Oil; IEC 60296 Oil
EINECS	Contact for details

Quality Control

Our Transformer Oil is manufactured and tested to meet or exceed major international standards, including ASTM D3487, IEC 60296, and BS 148. Each batch undergoes rigorous quality testing for key parameters such as dielectric breakdown voltage, acidity, interfacial tension, oxidation stability (RBOT), and viscosity. A Certificate of Analysis (COA) detailing all test results is provided with every shipment to ensure full traceability and compliance.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area away from heat sources and open flame. Recommended storage temperature is between 15°C and 25°C. Keep containers tightly sealed when not in use to prevent moisture absorption and contamination. Store away from strong oxidizing agents.

Specification

Item	Specification
Appearance	Clear, bright, free from suspended matter
Color (ASTM)	< 0.5
Density @ 20°C (kg/m³)	~ 880
Kinematic Viscosity @ 40°C (cSt)	< 12
Pour Point (°C)	< -40
Flash Point (PMCC) (°C)	> 140
Dielectric Breakdown Voltage (kV)	> 30 (New, Unprocessed)
Acidity (mg KOH/g)	< 0.01
Interfacial Tension (mN/m)	> 40
Oxidation Stability (RBOT) (min)	> 200
Water Content (mg/kg)	< 30

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.