Safety Data Sheets DUROVAL® 1 drop=1°dH Duroval 1 drop=1°dH in german Duroval 1 drop=1°dH in english Duroval 1 drop=1°dH in french Duroval 1 drop=1°dH in dutch Duroval 1 drop=1°dH in danish Duroval 1 drop=1°dH in swedish Duroval 1 drop=1°dH in spanish Duroval 1 drop=1°dH in portuguese Duroval 1 drop=1°dH in polish Duroval 1 drop=1°dH in finnish