Key words & phrases: propionaldehyde image and diagram explaining the infrared spectrum of propanal, complete infrared absorption spectrum of propanal, comparative spectra of propanal, prominent peaks/troughs for identifying functional groups in the infrared spectrum of propanal, important wavenumber values in cm-1 for peaks/troughs in the infrared spectrum of propanal, revision of infrared spectroscopy of propanal, fingerprint region analysis of propanal, how to identify propanal from its infrared spectrum, identifying organic compounds like propanal from their infrared spectrum, how to analyse the absorption bands in the infrared spectrum of propanal detection of aldehyde functional groups in the propanal molecule example of the infrared spectrum of a molecule like propanal with a functional group aldehyde propionaldehyde Diagram of absorption of wavenumber peaks in the infrared spectrum of propanal. Characteristic peak wavenumbers in the infrared spectrum of propanal. Finger print identification pattern using the infrared spectrum of propanal. Revision notes on the infrared spectrum of propanal. Matching and deducing the structure of the propanal molecule from  its infrared spectrum. How do you interpret the infrared absorption spectrum of propanal How to interpret the infrared spectrum of propanal Explanatory diagram of the infrared spectrum of the propanal molecule in terms of its molecular structure. Listing data of the prominent main wavenumber peaks troughs in the infrared spectrum of propanal. How to explain the infrared spectrum of propanal. Use of the infrared spectrum of propanal, identification of propanal from its infrared spectrum - fingerprint wavenumber pattern to identify the propanal molecule. The uses of the infrared spectrum of the propanal molecule. The distinctive features of the infrared spectrum of the propanal molecule explained interpretation diagram explaining the peaks-trough of the transmittance of the infrared spectrum of propanal what does the infrared spectrum tell you about the structure and properties of the propanal molecule? How is infrared spectrum of propanal used to identify propanal?