Magnesium Sulphate Paste is used as an ointment for drawing out boils. Stir well before use. For use on the the skin only. Adults- the elderly and children apply liberally to the affected part. Do not use repeatedly. Not for use on infants. Ingredients: Magnesium sulphate 38.5- w-w- phenol BP 0.5- w-w- glycerol (E422).