Abstract: A starch product which comprises gelatinized starch sulphamate and gelatinized starch phosphate is useful as a binder, particularly for coal briquettes. The product may be made by mixing preformed starch sulphamate and preformed starch phosphate but may also be prepared by heating gelatinized starch, gelatinized starch and a gelatinous starch sulphamate or gelatinized starch, and a gelatinized starch phosphate with, respectively a sulphamate and a phosphate, a phosphate or a sulphamate. Briquettes made from coal and the starch product having good bonding strength and carbonize with a clear flame.