Propylene Glycol Alginate E405
Propylene Glycol Alginate, also known as PGA or E405, is a food-grade modified alginate used by manufacturers as a thickener, stabilizer, suspension aid, texture modifier and emulsification support ingredient. It is valued in industrial formulations where viscosity control, acid stability, particle suspension, foam support, mouthfeel and process tolerance are important. This page is prepared as a detailed sourcing and technical review guide for purchasing, R&D, QA and regulatory teams.
Product identity
| Product | Propylene Glycol Alginate |
|---|---|
| Common names | PGA; E405; Propylene Glycol Ester of Alginic Acid |
| Category | Hydrocolloids, Gums & Gelling Agents |
| Function | Thickener, stabilizer, suspension aid, texture modifier, foam support and emulsion stabilizer |
| E / INS number | E405 |
| CAS / identity | 9005-37-2 |
| Typical chemistry | Propylene glycol ester of alginic acid derived from alginate chemistry |
| Typical form | Fine powder, granule or instantized grade |
| Functional profile | Hydration, viscosity development, acid-system stabilization, suspension, mouthfeel and foam support |
| Grade options | Different viscosity, esterification, mesh size and dispersion profiles depending on supplier and application |
Application fit
Potential use areas may include food systems where hydrocolloid stability, viscosity and suspension performance are required:
- Acidic dairy drinks, fermented beverages and protein-containing drink systems
- Fruit beverages, juice drinks, beverage emulsions and cloud systems
- Sauces, dressings, condiments and pourable culinary products
- Desserts, toppings, creams and spoonable dairy or non-dairy products
- Foam-stabilized systems and selected beverage foam applications
- Meat alternatives, plant-based systems and structured processed foods
- Industrial premixes requiring consistent hydration and viscosity control
Technical overview
Propylene Glycol Alginate is a modified alginate hydrocolloid designed to provide viscosity, stabilization and texture control in selected food systems. Compared with some conventional alginates, PGA is often evaluated where better performance in acidic environments, improved compatibility with certain food matrices or enhanced stabilization of dispersed phases is needed. Its final performance depends on molecular structure, degree of esterification, viscosity grade, particle size, hydration conditions, pH, ionic strength and interaction with proteins, minerals, sugars and other hydrocolloids.
In industrial formulations, PGA is not selected only by product name. Manufacturers normally compare viscosity grade, hydration speed, dispersion behaviour, acid stability, thermal process tolerance, particle suspension performance, mouthfeel and finished product stability. Small differences between supplier grades can affect mixing time, viscosity build, syneresis control, sedimentation, foam retention, emulsion stability and final product appearance.
Industrial functions
- Viscosity control: builds body and flow resistance in beverages, sauces, dressings and semi-solid products.
- Suspension support: helps reduce sedimentation of pulp, cocoa, spices, fibres, insoluble minerals or dispersed particles.
- Acid-system stabilization: useful in selected low-pH food and beverage systems where stable texture and suspension are required.
- Emulsion support: contributes to stabilization of oil droplets or dispersed phases when used with the correct emulsifier and homogenization system.
- Foam support: may help improve foam quality or retention in selected systems depending on formulation and process.
- Mouthfeel improvement: provides body, smoothness and controlled flow in drinkable, spoonable and pourable products.
- Water management: supports water binding and helps reduce separation, weeping or syneresis in compatible applications.
Specification review points
Industrial buyers should compare every offered grade against the intended food application and internal quality standard. Common review parameters include:
- Viscosity grade and test method
- Degree of esterification or esterification range where declared
- Particle size, mesh profile and dispersibility
- Moisture content and water activity-related handling risks
- Ash content and insoluble matter
- pH of solution or dispersion
- Appearance, colour, odour and foreign matter limits
- Heavy metals, lead, arsenic or other elemental impurity limits where applicable
- Microbiological limits including total plate count, yeast, mould and pathogens where required
- Batch traceability, shelf life and storage stability
Hydration and processing behaviour
Correct hydration is essential for Propylene Glycol Alginate performance. As with many hydrocolloids, poor dispersion can cause fish-eyes, lumps, incomplete hydration and inconsistent viscosity. Production teams should define whether PGA will be added directly into water, pre-blended with sugar or other dry ingredients, dispersed under high shear, hydrated in a premix tank or added as part of a stabilizer blend.
Hydration performance may be affected by water temperature, agitation speed, order of addition, solids level, sugar concentration, pH, calcium or mineral content, protein content and the presence of other gums or emulsifiers. Instantized grades may improve dispersion in some systems, while standard powder grades may require stronger mixing or dry blending before hydration.
Process and formulation considerations
- Check whether the grade is intended for cold dispersion, hot hydration or pre-blending with dry ingredients.
- Define the required viscosity at the actual process pH, solids level and temperature.
- Evaluate compatibility with proteins, minerals, acids, sugars, stabilizers, emulsifiers and preservatives.
- Measure viscosity after full hydration, after heat treatment and after storage.
- Assess sedimentation, phase separation, creaming, syneresis and mouthfeel over shelf life.
- Run pilot trials before changing supplier, viscosity grade or particle-size profile.
Quality assurance checklist
- Confirm supplier, manufacturer, country of origin and production traceability.
- Check Certificate of Analysis values against the approved specification.
- Verify viscosity method, solution concentration, temperature and measurement conditions.
- Review allergen, GMO, BSE/TSE, halal, kosher and vegan declarations where required.
- Confirm microbiological criteria for the target product category.
- Check packaging integrity, lot coding, expiry or retest date and storage conditions.
Application-specific purchasing guidance
For beverage manufacturers, the most important parameters are usually hydration behaviour, viscosity at target pH, suspension stability, clarity or turbidity impact, compatibility with pulp or cloud systems, heat-treatment tolerance and long-term storage stability. In acidic dairy or protein-containing beverages, buyers should also evaluate protein stability, sediment control, mouthfeel and any interaction with minerals or stabilizer blends.
For sauces, dressings and condiments, PGA may be assessed for pourability, cling, yield behaviour, emulsion stability, spice suspension and separation control. The target viscosity should be defined under realistic processing conditions, not only as a standard laboratory value. For desserts and toppings, texture, spoonability, smoothness, syneresis control and freeze-thaw performance may be important depending on the final product.
For plant-based and meat-alternative systems, PGA should be tested as part of the total hydrocolloid, protein and fat system. Texture performance may depend on protein source, oil content, salt level, pH, heating profile, shear history and interaction with other gums or starches.
Compatibility with other ingredients
Propylene Glycol Alginate is commonly evaluated alongside other stabilizers and texturizing systems. Depending on the application, formulators may compare or combine it with xanthan gum, guar gum, carrageenan, pectin, cellulose derivatives, starches, mono- and diglycerides, lecithins or beverage emulsifier systems. The correct blend depends on whether the target is flow control, particle suspension, emulsion stability, protein protection, foam retention, mouthfeel or freeze-thaw stability.
PGA should not automatically be treated as a direct one-to-one replacement for sodium alginate or other alginate grades. Traditional alginates may be selected for calcium-reactive gelation, while PGA is often selected for different stabilization and viscosity functions. The buyer should confirm the technical purpose before approving substitution.
Typical physical forms
Propylene Glycol Alginate is usually supplied as a fine powder, granule or instantized grade. Fine powders may hydrate efficiently but can require careful dust control and dispersion management. Granular or instantized grades may improve handling and wet-out in certain production systems. The preferred form depends on the plant's dosing system, mixer type, hydration time, dust control requirements and premix design.
When requesting a quotation, buyers should specify whether the material will be used in manual addition, automatic powder dosing, dry blending, liquid premix preparation or high-shear hydration. This helps identify the correct particle-size profile and packaging format.
Storage and handling
Store Propylene Glycol Alginate in original, tightly closed packaging in a clean, dry, cool and well-ventilated warehouse. Protect the product from moisture, condensation, foreign odours, direct sunlight, pests and contamination. Because hydrocolloid powders may absorb moisture, opened packaging should be resealed immediately after use and handled according to the supplier's recommendations.
Before production release, check the product name, batch number, expiry or retest date, packaging condition, appearance, odour and any signs of caking, wetting or contamination. Production teams should follow FIFO or FEFO stock rotation and maintain traceability from warehouse receipt to finished product batch.
Packaging and logistics
Packaging depends on supplier, grade and order quantity. Common industrial formats may include multi-wall paper bags with inner liners, cartons, fibre drums or palletized export units. For international shipments, buyers should confirm net weight, gross weight, pallet dimensions, container loading plan, batch coding, label language, storage marks and document requirements before dispatch.
- Small sample packs for laboratory screening and formulation trials
- Bagged powder or granular grades for regular industrial production
- Fibre drums or cartons for sensitive grades or customer-specific packing
- Palletized export packing with batch labels and handling marks
- Container-load options for high-volume manufacturers and regular supply programs
Regulatory and compliance notes
Propylene Glycol Alginate is identified as E405 in food additive contexts, but permitted use is not universal across all countries, food categories or maximum levels. Buyers must verify the regulatory status of the ingredient in the destination market and confirm that the offered grade matches the final product category, use level, additive function and label declaration.
For export supply, customers may require halal, kosher, vegan, non-GMO, allergen, BSE/TSE, residual solvent, heavy metal, microbiological, origin and food safety declarations. The exact document package should be agreed before order confirmation, especially for retailer-controlled, private-label, infant, dairy, beverage or supplement-adjacent supply chains.
Documents to request
- Product specification or technical data sheet
- Certificate of Analysis for the available batch or lot
- Safety Data Sheet where applicable
- Food additive grade statement and E405 reference where applicable
- Viscosity method, concentration, temperature and testing condition details
- Origin, manufacturer, shelf-life and storage information
- Allergen, GMO, BSE/TSE, halal, kosher and vegan declarations where required
- Microbiological specification and contaminant information where required
- Heavy metal, lead, arsenic and elemental impurity information where applicable
- Label draft, packaging details, pallet configuration and batch traceability information
- Market-specific declarations requested by the destination country or final customer
Commercial sourcing guidance
When reviewing Propylene Glycol Alginate, compare the supplier specification against the intended food application, process conditions, target function, label expectations and local rules. For industrial purchasing, the most useful inquiry normally includes target viscosity grade, application, pH range, physical form, packaging size, quantity, destination, Incoterm, delivery schedule and document requirements.
If the product is used in a technical stabilizer system, the buyer should describe the complete application: beverage pH, solids level, heat process, protein content, pulp or particle load, target viscosity, storage temperature, packaging format and desired shelf life. This helps determine whether the correct PGA grade, blend or alternative hydrocolloid system should be evaluated.
How to request this product
Send the product name, E number, target grade, viscosity requirement, reference specification, application, pH range, quantity, destination country, packaging preference, expected shipment date and required documents. If you already purchase Propylene Glycol Alginate, attach or describe your existing specification, label, Certificate of Analysis or approved supplier standard so supplier options can be compared more accurately.
Useful answers
What is Propylene Glycol Alginate used for in food manufacturing?
Propylene Glycol Alginate E405 is typically used as a hydrocolloid thickener, stabilizer, suspension aid, texture modifier, foam support ingredient and emulsion stabilizer. It may help with viscosity, suspension, water binding, mouthfeel, acid-system stability and phase separation control. Exact suitability depends on grade, application, process, regulations and supplier documents.
Which applications commonly use E405?
E405 may be evaluated in acidic beverages, dairy drinks, fruit drinks, sauces, dressings, desserts, toppings, beverage emulsions, foam-stabilized systems, meat alternatives and plant-based products where a suitable hydrocolloid stabilizer is technically and legally appropriate.
Which documents should be requested?
Buyers commonly request a technical data sheet or specification, Certificate of Analysis, Safety Data Sheet, origin statement, shelf-life information, storage guidance, viscosity method, microbiological specification, allergen statement, GMO statement, halal or kosher documents where required, label details and packaging information.
Can Global Food Additives source Propylene Glycol Alginate?
Global Food Additives can review sourcing options for Propylene Glycol Alginate according to target specification, viscosity grade, application, quantity, destination, packaging and required documentation.
Is this product permitted in every country?
No. Food additive use depends on destination-market rules, food category, use level, function, label requirements and buyer responsibility. The buyer should verify regulatory status before commercial use.
How should buyers compare different PGA suppliers?
Buyers should compare viscosity grade, test method, esterification profile, particle size, hydration behaviour, application performance, Certificate of Analysis values, regulatory documents, microbiological limits, packaging, shelf life, minimum order quantity, lead time, origin, price stability and supplier change-control practices.
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Send product names, target specifications, quantity, destination country, packaging preference, delivery term, and document requirements. Our team will review your inquiry and respond from orders@foodgradeadditives.com.
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