Ethyl 2-Amino-4,5-bis(2-methoxyethoxy)benzoate Hydrochloride is acidic salt of 2-Amino-4,5-bis(2-methoxyethoxy)benzoic Acid Ethyl Ester(A602006); an intermediate in the synthesis of Erlotinib (E625000, HCl); a selective epidermal growth factor receptor (EGFR)-tyrosine kinase inhibitor and antineoplastic agent.