ZnSe (Zinc selenide) is an optical material commonly used in mid-infrared spectroscopy either as a window for transmission optical cells or as a prism (crystal) for ATR (Attentuated Total Reflectance).  

ZnSe is a soft material and suitable mainly for pastes and liquids. Diamond is the common alternative to ZnSe as it is much harder and has a wider spectral range. Both have a moderately high refractive index of 2.4 making it suitable for a wide range of samples with a refractive index generally below 1.7.  

Materials with strongly absorbing chemical functional groups can have spectra that appear distorted on a ZnSe or Diamond prisms. However, running those samples on a Germanium ATR prism is an common solution and far superior to older algorithmic ATR correction algorithms.

ATR Infrared Spectroscopy users often require FTIR libraries and search software to help them identify a wide variety of chemicals.

We publish: 

1) numerous FTIR  and ATR/FTIR libraries, covering polymers, drugs, organic and inorganic compounds, and more, either individually, or in bundles, and

Browse and filter the FTIR & Raman libraries here. 

Browse the spectral library bundles here. 

Browse the FTIR accessory and spectral library KITs here.

2) the FDM SearchFaster™ software, for searching unknown spectra against the FDM FTIR libraries.

We offer our libraries and software via a one-time license fee or on a subscription basis.

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