Attempts were made to investigate compositional constraints in the synthesis of 4A molecular sieves using metakaolin from the gel composition Al2O3: 7.1SiO2: 5.8 Na2O: 150 H2O in the temperature 100oC for 6-8h. Use of other clay materials in 4A synthesis is nullified. XRD and FT-IR spectra in framework region of 4A synthesized using metakaolin in autogeneous pressure are having similar pattern to the reported one. Scanning electron microscopic picture of the both are varies kaolin and 4A varies. MASNMR shows the presence of tetrahedral aluminium and Si:4Al, Si:3Al:Si and Si:4Si species.