Grade

Nominal Phthalyl Content

pH Solubility

Regulatory Status

Application

HP-50

24%

?5.0

USP/EP/JP; DMF, CDMF available

·    Enteric coating; soluble at lower pH

·    Carrier for solid dispersions

HP-55

31%

?5.5

·    Regular grade enteric coating

·    Carrier for solid dispersions

HP-55S

·    Enteric coating with greater film strength