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

Microscopic observation

Passes test (if not pregelatinised)

Iodine staining

Passes test (dark blue to light red colour)

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