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 inter-molecular aromatic C - H···π interactions give sheet structures parallel to [110].