| Synonyms | |
| Definition | Hydroxypropyl starch is starch etherified with propylene oxide |
| Einecs | |
| Chemical name | |
| Chemical formula | |
| Molecular weight | |
| Assay | |
| Description | White or nearly white powder or granules or (if pregelatinised) flakes, amorphous powder or coarse particles |
| Identification | |
|---|---|
| Microscopic observation | Passes test (if not pregelatinised) |
| Iodine staining | Passes test (dark blue to light red colour) |
| Purity | |
| Loss on drying | Not more than 15,0 % for cereal starch Not more than 21,0 % for potato starch Not more than 18,0 % for other starches |
| Hydroxypropyl groups | Not more than 7,0 % (on an anhydrous basis) |
| Propylene chlorohydrin | Not more than 1 mg/kg (on an anhydrous basis) |
| Sulphur dioxide | Not more than 50 mg/kg for modified cereal starches (on an anhydrous basis) Not more than 10 mg/kg for other modified starches, unless otherwise specified (on an anhydrous basis) |
| Arsenic | Not more than 1 mg/kg |
| Lead | Not more than 2 mg/kg (on an anhydrous basis) |
| Mercury | Not more than 0,1 mg/kg |