Immersion oil, low fluorescence, type LDF

In most regards, this is our best immersion oil for fluorescence microscopy. It has extremely low background fluorescence (Cargille # 1-2). It has excellent optical values of refractive index (1.515 at sodium yellow 5893 angstroms and 1.518 at mercury green 5461 angstroms) and dispersion (41.3 for Abbe υD) for a sharp image. It has a medium viscosity of 500 cSt. It has an odour, (1-bromonaphthalene), that some people dislike.