Phenyl Hydrazine is a colourless to pale yellow liquid chemical with a fainted aromatic odour and having a density of 1.0978 grams per cubic centimetres. It becomes an oily liquid on melting at a temperature of 66 degree Fahrenheit. It is acutely toxic and auto ignites at a temperature value of 173 degree Celsius. Phenyl Hydrazinehas a chemical formula of C6H8N2 with an average molar mass of 108.14 grams per mol. It is commonly used to prepare indoles which is used as an intermediates in the synthesis of various dyes and pharmaceuticals. It boiling point is 243.5 degree Celsius and a magnetic susceptibility of -67.82 X 10^ -6 cubic centimetres per mol.