Amine derivatives which can be used for the manufacture of phenethanolamine

1-(4-hydroxy-3-(hydroxymethyl) phenyl)-2-amino-1-ethanol derivs. of formula (I) and their salts and solvates are new. In(I) m = 2-8 and n = 1-7, provided that m+n = 4-12; Ar = phenyl opt. substd. by 1 or 2 of halogen, 1-3C alkyl and 1-3C alkoxy or by O(CH2)pO, where p = 1 or 2; R1 and R2 = H or 1-3C alkyl, provided that the total no. of C atoms in R1 and R2 is not more than 4.