PROPYLENE GLYCOL ALGINATE- ▸ Food & beverage: Thickener and stabilizer (E405)
- ▸ Emulsions: Emulsion stabilizer in dressings and sauces
- ▸ Brewing: Foam (head) stabilizer in beer
- ▸ Cosmetics: Thickening and stabilizing agent
A grade-specific Safety Data Sheet (SDS) — with the complete hazard classification, handling precautions, and transport information — is supplied with every shipment and available on request. Confirm all safety and regulatory details against the SDS for your specific grade.
Request SDS →Propylene glycol alginate (CAS 9005-37-2) is a propylene glycol ester of alginic acid, a polysaccharide derived from brown seaweed. It is used as a thickener, stabilizer, and emulsifier in food and beverage systems and as a foam stabilizer in beer.
Regulatory & registration requirements
- TSCA (US):
- REACH (EU): Not determined from public registry
- EC number: 618-414-0
TSCA Inventory flag XU: a substance exempt from reporting under the Chemical Data Reporting Rule (40 CFR 711) (EPA flag legend).
Source: EPA TSCA Inventory (July 2025 release) · ECHA CHEM — retrieved 2026-07-12
Solutions Using This Product
Process-solution guides on this site that specify this chemistry:
Frequently Asked Questions
What is propylene glycol alginate used for?
Propylene glycol alginate (CAS 9005-37-2, E405) is a propylene glycol ester of alginic acid from brown seaweed, used as a thickener, stabilizer, and emulsifier in food and beverage systems. It is also a foam (head) stabilizer in beer and a thickening agent in cosmetics.
What is the difference between propylene glycol and propylene glycol alginate?
Propylene glycol (CAS 57-55-6) is a small-molecule diol, whereas propylene glycol alginate (CAS 9005-37-2) is a high-molecular-weight seaweed polysaccharide partially esterified with propylene glycol. They are chemically distinct: one is a solvent/humectant, the other a hydrocolloid thickener.
What is propylene glycol alginate made from?
It is made by esterifying alginic acid, extracted from brown seaweed, with propylene oxide to attach propylene glycol groups along the polymer chain. The degree of esterification affects its solubility and emulsifying performance.
What grades and packaging of propylene glycol alginate are available?
RawSource supplies food/beverage-grade propylene glycol alginate (E405) to manufacturers in bags and bulk, with viscosity and esterification specs confirmed on the CoA. Submit your target quantity and viscosity spec for a bulk quote.
What is the HS code for propylene glycol alginate?
It is classified under HS 3913.10 (alginic acid, its salts and esters). Confirm the exact tariff line with your customs broker for the destination country; an SDS is provided for handling information.
What is the REACH and TSCA regulatory status of Propylene Glycol Alginate (PGA, E405)?
Propylene Glycol Alginate (PGA, E405) (CAS 9005-37-2) is listed as Active on the U.S. EPA TSCA Inventory; its REACH registration status is not determined from the public ECHA registry.