Shandong Huashang Chemical Co., Ltd. is a high-tech enterprise focused on industry of fine chemicals research and develop, produce and sale. Shandong Huashang Chemical Co., Ltd. is located in Shan Dong Ji Nan China. we have the ability to provide you high quality products. More than 90 % of our products are exported to developed countries and regions such as north America, Europe, Japan, South Korea and the Middle East.
1. Basic Product Information
- Full Name: Sodium Alginate
- Aliases: Alginic Acid Sodium Salt, Algin
- CAS No.: 9005-38-3
- EINECS No.: 232-680-1
- Molecular Formula: (C6H7NaO6)n
- Molecular Weight: Polymeric macromolecule, variable molecular weight according to viscosity grade
- Chemical Classification: Natural water-soluble polysaccharide, seaweed extract, food thickener, biopolymer additive
- Core Product Features
Natural polysaccharide extracted from brown seaweed, excellent thickening, gelling, film-forming and stabilizing properties. Non-toxic, biodegradable, wide viscosity grades available, forms firm thermo-irreversible gel with calcium ions. Complies with FCC, E401, USP, food and cosmetic safety standards, widely applied in food, printing, textile, medical and cosmetic industries.
2. Detailed Physical & Chemical Properties
2.1 Physical Properties
- Appearance: White or light yellow fibrous powder, uniform texture, no caking
- Odor: Odorless, tasteless or slight seaweed faint smell
- Solubility: Freely soluble in cold and hot water to form viscous colloidal solution; insoluble in ethanol, acetone, ether and organic solvents
- pH Value (1% aqueous solution): 6.0 ~ 8.0, weak alkaline
- Melting Point: No fixed melting point, decomposes above 200℃
- Boiling Point: Thermal decomposition occurs before boiling
- Hygroscopicity: Moderately hygroscopic, needs sealed storage to avoid absorbing moisture and agglomeration
- Gel Characteristic: Cross-links with Ca2?, Ba2?, Sr2? to form insoluble alginate gel
2.2 Chemical Properties
- Structural Feature: Linear anionic polysaccharide composed of mannuronic acid and guluronic acid units
- Acid-Base Stability: Stable in neutral and weak alkaline systems; precipitates as insoluble alginic acid under pH < 4.0
- Thermal Stability: Stable under normal food sterilization temperature; long-time heating above 150℃ causes molecular chain degradation and viscosity drop
- Ion Reaction: Reacts with divalent metal cations to form gel; incompatible with high-concentration calcium salt added directly into aqueous solution
- Biodegradability: Completely degraded by marine and soil microorganisms, eco-friendly raw material
- Safety Property: Edible, no cumulative toxicity, approved for food, oral and external medical use
3. Comprehensive Product Applications
3.1 Food Industry (Core Application, E401)
Thickener, stabilizer, gelling agent and film-forming agent for beverages, ice cream, jelly, pudding, canned food, noodles, meat surimi and bionic seafood. Improves product texture, prevents water separation, and forms edible fresh-keeping coating on fruit surfaces.
3.2 Textile & Printing Industry
Printing paste thickener for reactive dye printing, replaces starch; provides clear printing outline, easy washing, no hardening of fabric. Sizing agent for yarn to increase fiber toughness.
3.3 Medical & Pharmaceutical Industry
Raw material for wound dressing, hemostatic alginate dressing, slow-release drug carrier, oral capsule excipient, medical tablet binder. The gel absorbs wound exudate and promotes skin tissue repair.
3.4 Cosmetic & Daily Chemical
Thickening stabilizer for facial mask, cream, body lotion and essence; forms moisturizing protective film on skin, mild and non-irritating.
3.5 Other Industrial Fields
Water treatment flocculant, ceramic blank binder, fertilizer sustained-release coating, 3D printing biological material, microcapsule wall material.
4. Full Parameter Specification Table
| Item | Detailed Standard Specification |
| CAS No. | 9005-38-3 |
| Molecular Formula | (C6H7NaO6)n |
| Molecular Weight | Polymeric macromolecule, viscosity graded |
| Appearance | White / light yellow fibrous powder |
| Melting Point | Decompose above 200℃, no fixed melting point |
| Boiling Point | Decompose before boiling |
| Viscosity Grade | Low / Medium / High Viscosity (20–1000 mPa·s, 1% solution) |
| Moisture Content | ≤15.0% |
| Ash Content | 18.0% ~ 24.0% |
| Heavy Metal (Pb) | ≤10 ppm (food grade) |
| Insoluble Matter | ≤0.3% |
| Bulk Packaging | 25kg kraft paper bag with PE inner liner |
| Sample Packaging | 1kg / 5kg sealed plastic bag |
| Storage Condition | Sealed cool dry warehouse, avoid humid environment and strong acid |
| Transportation Standard | Natural food additive, non-dangerous goods, waterproof packaging required |
| Shelf Life | 24 months under intact original sealed packaging |
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