Objective: The objective of the investigation was to isolate mucilage from sweet basil seeds and explore its physicochemical properties for the development of pharmaceutical suspensions and surfactant-free stable emulsions.Methods: Possible applications of sweet basil seed mucilage in the pharmaceutical field for dosage form development are being explored. The physicochemical and functional properties of the mucilage from the seeds of the Ocimum basilicum L. (Sweet basil) have been investigated for stabilization of suspensions and emulsions. The following analyses were performed: FTIR spectroscopy, phytochemical tests, XRD, swelling and rheological studies.Results: The analyses showed that the mucilage is rich in glucose, mannose, and xylose. High swelling index values varying from 100±10 to 200±13%, high water-holding capacity of 97.5±2.4 g/g mucilage and reasonable oil holding capacity of the mucilage (13.2±1.3 g/g mucilage) makes it an ideal candidate for utilization as viscosifier and stabilizer of suspensions and surfactant-free emulsions. Adult and paediatric paracetamol suspension formulations with 1%w/v mucilage have exhibited flocculated nature and good stability owing to its high sedimentation volume(F= 0.85-0.98) and good redispersibility. Sunflower oil emulsions prepared with 0.25%w/v mucilage demonstrated emulsion stability index of 105.714 on 5th day and extremely low creaming rate of 0.0004 cm/h thus confirming maximum stability compared to emulsions developed with 0.3-0.5% w/v mucilage.Conclusion: The mucilage isolated from Ocimum basilicum L. seeds may be regarded as a functional biomaterial for pharmaceutical use to ensure quality and stability of liquid dosage forms.