The use of immersion oils in light microscopy increases the resolving power of the microscope by replacing the air gap between the immersion objective lens and cover glass with a high refractive index medium and reducing light refraction.

Cargille Immersion Oils: Cargille was first to introduce PCB-Free immersion oils in 1972. Though all immersion oils are now PCB free, no other immersion oil meets FDA criteria; and Cargille's exceeds ISO, DIN and all instrument manufacturer's standards.

Type A and B: Normal light microscopy 
Type 37: Elevated temperatures (>23°C to 37°C) 
Type 300: Automated haematology systems
Type NVH or OVH: Inverted, inclined, projection, and long focus instruments
Type LDF and HF: Fluorescence microscopy, extremely low fluorescence
Type FF: Nearly fluorescence-free Immersion oil (not ISO compliant)

EMS Immersion Oils: EMS have introduced a complete new line of immersion oils. This new family includes 5 unique types.

  • Critical use
  • Synthetic
  • High viscosity
  • Low viscosity with R.I 1.480 (Synthetic)
  • Low refractive index (1.455) – suitable with aqueous media


Code Title Option 1 Option 2 Option 3 Availability* Price