9004-30-2 CARBOXYETHYL HYDROXYETHYL CELLULOSE CMHEC Carboxymethyl 2-hydroxyethylcellulose ether Carboxymethyl hydroxyethyl cellulose Carboxymethyl hydroxyethylcellulose Cellulose, carboxymethyl 2-hydroxyethyl ether Cellulose, carboxymethyl hydroxyethyl ether Cellulose, carboxymethyl hydroxyethyl mixed ether Cellulose, carboxymethyl-2-hydroxyethyl ether, sodium salt HSDB 959 SPX 5338 Sodium carboxymethyl hydroxyethylcellulose Tylose CH 50