Ethyl N-[2-(4-phenoxyphenoxy)ethyl]-carbamate

The title compound, C17H19NO4, which is a non-toxic insect growth regulator with the common name fenoxycarb, contains two independent and conformationally different molecules in the asymmetric unit. Although the inter-ring dihedral angles are similar [62.21 (15) and 63.00 (14) ], the side-chain orientations differ. In the crystal, the molecules are linked through N—H O hydrogen-bonding associations, giving chains which extend along [110], while intra- and intermolecular aromatic C—H interactions give sheet structures parallel to [110].