Hydrazine having chemical formula as N2H4 has numerous applications such as oxygen scavenger to other corrosion attack in the boilers circuits, for synthesis of various pesticides, in rockets fuels, etc. Aquagenix offers user friendly test method with ease of handling the relevant reagents and other equipment used in the analysis. For determination of hydrazine, this test relies on Lambert Bear’s Law of spectrometry where para-dimethylaminobenzaldehyde in acidic medium is allowed to react with hydrazine developing YELLOW color complex that is directly proportional to the hydrazine concentration in the solution in this test, wavelength for maximum absorbance is 455 nm for spectrophotometers and 420 nm for colorimeters.