A high resolution gas chromatography method for the analysis of the aromatised product of n-heptane has been developed. The individual aromatics were separated on OV-101 and OV-275 capillary columns. The qualitative analysis was done using correlation between Retention data vs, boiling point and the literature data available. Quantitation was achieved using flame ionisation detector assuming that the relative response for all aromatics is same. Packed column of OV-275 gave group type distribution of saturate (1.2%), monoaromatics (76.6%) diaromatics 21.9% and triaromatics 0.3%. Data generated are presented as individual components, hydrocarbon groups and according to carbon number distribution.