A salt of a pullulan aminoalkyl ether according to claim 1, wherein the salt-forming acid is hydrochloric acid, hydrobromic acid, sulfuric acid, nitric acid, acetic acid, or oxalic acid.

• 根据权利要求1的普鲁兰氨基烃基醚的盐，其中，由盐形成的酸为盐酸、氢溴酸、硫酸、硝酸、乙酸或者草酸。