Specifications Table

Product Name – Alginic acid sodium salt, high viscosity
Quantity/Pack Size – 1kg, 250g, 100g
Form – Powder
Grade – Laboratory
Application – Gel formation, encapsulation, biochemical assays

Product Overview

Alginic acid sodium salt (high viscosity) is a naturally derived polysaccharide extracted from brown algae, widely recognized for its exceptional gelling properties. This lab-grade sodium alginate forms stable, heat-reversible gels in the presence of calcium ions, making it indispensable for applications requiring controlled viscosity and structural integrity. The high molecular weight of this variant ensures superior gel strength and elasticity compared to standard grades, while its purity minimizes interference in sensitive biochemical processes. As a water-soluble polymer, it dissolves rapidly without clumping, providing consistent performance across various pH ranges (4-10). The powder’s fine particle size enables homogeneous dispersion, critical for reproducible experimental outcomes. Free from heavy metals and microbial contaminants, this sodium alginate meets stringent laboratory standards for reliability in research environments. Its biocompatibility and non-toxicity further extend its utility in systems requiring inert support matrices. The product’s moisture content is carefully controlled (<10%) to prevent premature gelation during storage, ensuring long-term stability when kept in airtight containers.

FAQs

1. What determines the gel strength when using this sodium alginate?

Gel strength primarily depends on the calcium ion concentration, alginate concentration in solution, and the pH of the medium. Higher alginate concentrations (1-3% w/v) and gradual calcium introduction produce firmer gels.

2. Can this high-viscosity alginate be autoclaved for sterile applications?

Autoclaving is not recommended as prolonged heat exposure degrades the polymer chains, reducing viscosity. For sterile applications, prepare solutions using sterile water and filter sterilize through 0.22µm membranes.

3. How does this compare to low-viscosity sodium alginate in encapsulation?

High-viscosity alginate creates thicker capsule walls and larger bead sizes, offering better protection for encapsulated materials but slower release rates compared to low-viscosity variants.

4. What’s the ideal storage temperature for maintaining product quality?

Store unopened containers at 15-25°C in low-humidity environments. Avoid refrigeration as condensation may cause premature gelation. Always reseal packages tightly after opening.

5. Are there any known incompatibilities with common lab reagents?

Sodium alginate precipitates in solutions containing multivalent cations (except calcium) or alcohols above 30% concentration. It remains stable in most aqueous buffers but may degrade in strongly acidic (pH11) conditions.