Brief: Innospec Q1 sales USD 509.6 million
May 3 (Reuters) - Innospec Q1 gross profit USD 147.8 million. * Q1 operating income USD 41 million * Q1 net income USD 33.2 million * Q1 sales USD 509.6 million * Q1 pretax profit USD 45 million * Q1 EPS USD 1.33 * Q1 adjusted EPS USD 1.38