Sodium Polyacrylate
Sodium polyacrylate is regulated by FDA primarily as an indirect (food-contact) additive under 21 CFR 172/176/177 in specified limited applications and is not a typical direct food ingredient. Its high molecular weight means systemic absorption is negligible, but presence as a direct ingredient in a food is unusual and likely a labeling error or non-food product.
What it is
A super-absorbent sodium salt of polyacrylic acid (CAS 9003-04-7); polymeric.
Generally not used directly in food; used in food packaging absorbent pads (meat/poultry trays), diapers, and as a thickener in some industrial formulations. May be permitted as an indirect food additive in specific contexts.
Why it's flagged
- non-food-typical ingredient
- potential mislabeling
- polyacrylic acid residual monomer limits in food contact
What regulators actually say
"Sodium polyacrylate may be safely used as a boiler water additive... in compliance with the requirements of this section."
"Annex I of Regulation (EU) No 10/2011 contains the Union list of authorised monomers, other starting substances... which may be used in the manufacture of plastic materials."
Regulatory status
United States — FDA
Listed in food contact substance regulations, e.g., 21 CFR 173.73 and 175.105 for limited indirect uses.
European Union — EFSA
Polyacrylic acid sodium salt is not authorized as a food additive in EU food (Regulation 1333/2008); allowed in food contact under Regulation 10/2011 with restrictions.
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