Molekula
Alginic acid
Supplying 4,500+ customers in over 80 countries
ISO 9001:2015 & ISO 14001:2015 certified · Supplying laboratories and industry since 2000 · Listed pack sizes are a starting point — we manufacture, source and repack to the quantity you need
Alginic acid is a natural polysaccharide derived from brown seaweed, widely used as a thickening, stabilizing, and gelling agent in food, pharmaceuticals, and cosmetics. It forms viscous solutions in water and is essential in products like ice cream, dressings, and wound dressings due to its gel-forming properties. Alginic acid has a CAS number of 9005-32-7, a molecular formula of C6H8O6, and a molecular weight of 176.10. It can be stored at ambient conditions and carries no signal word for hazard classification. Molekula supplies alginic acid from research to bulk quantities with full documentation and ISO 9001:2015 traceability.
Example image for illustration only. Other packaging and pack sizes are available.
Pricing & pack sizes
These pack sizes aren't a limit. Molekula manufactures, sources and repacks to order — if you need 500 kg and only see 1 kg listed, . We quote from grams to multi-tonne.
Need a different size? Add the nearest pack and change the size in your basket — we price it at the same rate per unit.
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100 g — £30.90 per pack ex VAT · £37.08 inc. VAT
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500 g — £91.90 per pack ex VAT · £110.28 inc. VAT
Need a different quantity or pack?
Tell us how much you need and when — drums, IBCs, sacks or a one-off bulk lot. We'll manufacture or source it and come back with a price.
Prices exclude VAT/sales tax and shipping.
Specifications
| Property | Value |
|---|---|
| Appearance | Pale yellow to White powder |
| Heavy metals | ≤0.004% |
| Viscosity | According to need |
| pH | 1.5 - 3.5 |
| Loss on Drying | ≤15.0% |
| Acidity | ≥230 |
| Residue on Ignition | ≤5.0% |
| Mesh | 100 |
| Iron (Fe) | ≤0.05% |
| Arsenic (As) | ≤0.0004% |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Flash Point | 100 °C |
| Transport Class | Not regulated |
| Acidity | Acid |
Identification
| Property | Value |
|---|---|
| SKU | 15543584 |
| CAS Number | 9005-32-7 |
| EC Number | 232-680-1 |
| Molecular Formula | [C6H8O6]n |
| Molecular Weight | 176.10 |
| SMILES | C[N+](C)(C)C1=COC=C1.[I-] |
| REACH Code | Y113 |
| TSCA Listed | Yes |
| HTS Code | 3913.10.0000 |
| Tariff Code | 3913100090 |
Safety & GHS
Precautionary statements
- P280 Wear protective gloves/protective clothing/eye protection/face protection
Documents
Safety Data Sheets (SDS)
Available in English, German, Spanish, French, Italian, Portuguese, Arabic, Dutch.
Certificate of Analysis (CoA) by batch
Enter a lot or batch number to retrieve the CoA for that specific batch. We can generate one from spec data if no PDF is on file.
Synonyms
No alternate names recorded for this product.
Frequently asked questions
What is alginic acid commonly used for?
Alginic acid is primarily used in food and pharmaceutical industries as a gelling agent, thickener, and stabilizer, particularly in products like desserts, dairy alternatives, and wound dressings.
What is the chemical formula and molecular weight of alginic acid?
The chemical formula is **C₆H₈O₆**, and the molecular weight is **176.10 g/mol**.
How should alginic acid be stored?
Store alginic acid at **ambient temperature** in a dry, well-ventilated area, away from moisture and direct sunlight.
What grades of alginic acid does Molekula supply?
Molekula supplies **food-grade and pharmaceutical-grade alginic acid**, meeting industry standards for purity and safety.
Can Molekula supply alginic acid in bulk quantities?
Yes, Molekula offers alginic acid in **bulk quantities** (e.g., 25kg drums, 50kg bags, or larger custom packaging) for industrial and commercial use.
What documentation comes with an order of alginic acid?
Each order includes a **Certificate of Analysis (CoA)**, **Material Safety Data Sheet (MSDS)**, and **batch-specific documentation** to ensure compliance and traceability.
Ready to order or need a custom pack?
Tell us the product, grade, and quantity — Molekula usually responds within one working day with pricing and lead time.