Sodium Sulfate as a Stabilizer for Bioprocesses
Overview:
Sodium sulfate (Na₂SO₄) is an inorganic salt commonly used in biochemical and biotechnological processes due to its stabilizing effects on proteins, enzymes, and certain microbial systems. While not an active biochemical itself, it plays an important supportive or conditioning role in maintaining osmotic balance, ionic strength, and enzyme stability in bioprocess environments.
Quality & Compliance
Manufactured under Good Manufacturing Practice (GMP) conditions.
Complies with Pharmacopoeial standards: USP / EP / BP / IP.
Non-toxic, non-reactive, and chemically stable under normal storage conditions.
Certificate of Analysis (CoA) provided with each batch.
* Functions in Bioprocesses
Protein and Enzyme Stabilization:
Sodium sulfate is a kosmotropic salt (structure-making ion) that stabilizes protein folding by strengthening water–protein interactions.
It can prevent protein denaturation or aggregation during fermentation and purification steps.
*Osmotic Balancer:
Helps maintain osmotic pressure in microbial or mammalian cell cultures.
Supports cell viability during stress conditions (e.g., pH or temperature shifts).
Buffer Component or Additive:
Often used alongside other stabilizers (e.g., sodium chloride, glycerol, or phosphate buffers) to control ionic strength and prevent precipitation of sensitive biomolecules.
Clarification and Downstream Processing:
Used in protein crystallization and precipitation processes — for example, in ammonium sulfate precipitation, sodium sulfate may serve as a milder alternative or complement.
pH and Ionic Strength Control:
Provides a stable ionic environment in enzyme reactions, fermentation media, or biocatalytic systems.
* Applications in Bioprocess Industries
Application AreaRole of Sodium SulfateFermentationEnhances microbial stability, maintains osmotic pressureEnzyme FormulationsPrevents enzyme denaturation, increases shelf lifeProtein PurificationAids in crystallization or selective precipitationPharmaceutical BioprocessingStabilizes therapeutic proteins and antibodiesIndustrial BiocatalysisImproves catalytic efficiency in aqueous-organic media
* Typical Concentrations
Usually employed in 0.05–0.5 M concentration range, depending on the process.
Higher concentrations may induce salting-out effects useful in protein precipitation.
*Handling and Compatibility
Purity: Use high-purity (analytical or bioprocess grade) sodium sulfate to avoid contamination.
mpatibility: Works well with phosphate, Tris, and acetate buffers.
Limitations: Excessive sulfate concentration can inhibit certain microbial strains or alter enzyme activity — optimization is required.
* Summary
Sodium sulfate serves as a cost-effective stabilizer in bioprocessing by:
Enhancing protein/enzyme stability
Maintaining osmotic and ionic balance
Assisting in purification and crystallization steps
Its often included in formulation buffers, fermentation media, or enzyme stabilization systems to improve overall process robustness and yield.
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Sodium Sulfate – Food & Pharma Grade
Packaging Information
Packaging Type Material Net Weight Details / Features
HDPE Bags with Inner Liner High-Density Polyethylene 25 kg Moisture-proof, tamper-sealed, suitable for export use
Kraft Paper Bags with LDPE Liner 3-ply Kraft paper 25 kg Eco-friendly, ideal for pharma & food applications
Jumbo Bags (FIBC) Woven polypropylene 500 kg – 1000 kg For bulk industrial and bioprocess customers
Custom Packaging As per customer requirement — Available on request (e.g., 10 kg, 20 kg, 50 kg bags, or drum packaging)
Storage & Handling
Store in a cool, dry, and well-ventilated area away from moisture and incompatible materials.
Avoid direct contact with strong acids or reducing agents.
Recommended shelf life: 2 years from manufacturing date under proper storage conditions.
Available Grades
Sodium Sulfate – Food Grade (Na₂SO₄, ≥99%)
Suitable for food processing, additives, and buffer preparation.
Sodium Sulfate – Pharma Grade (Na₂SO₄, ≥99.5%)
Used in pharmaceutical formulation
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Sodium Sulfate – Stabilizer for Bioprocesses
Molecular Formula: Na₂SO₄ | Molecular Weight: 142.04 g/mol | CAS No.: 7757-82-6
Product Overview
Sodium sulfate is a high-purity inorganic stabilizer widely used in biotechnological, pharmaceutical, and fermentation processes.
In bioprocess applications, it functions as a protein and enzyme stabilizer, osmotic regulator, and ionic strength modifier, ensuring optimal conditions for sensitive biological systems.
Key Functions
Protein & Enzyme Stabilization:
Maintains structural integrity of enzymes and proteins during fermentation, purification, and storage.
Osmotic Pressure Regulation:
Helps maintain cell viability and productivity in microbial or mammalian cultures.
Buffer & Medium Conditioning:
Adjusts ionic strength and supports consistent pH control in fermentation and biocatalysis.
Downstream Processing Aid:
Facilitates selective protein precipitation and crystallization for purification steps.
Applications
Industry Application Role
Biopharma / Biotech Stabilizer in enzyme formulations and fermentation media
Food Biotechnology Process additive and osmotic stabilizer
Enzyme Production Enhances enzyme activity and shelf life
Protein Purification Used for controlled precipitation and crystallization
Industrial Biocatalysis Maintains catalytic efficiency under process stress
Technical Specifications
Parameter Typical Value
Appearance White crystalline powder
Assay (Na₂SO₄) ≥99.5%
pH (5% solution) 6.0 – 8.0
Moisture ≤0.2%
Insoluble Matter ≤0.01%
Heavy Metals (as Pb) ≤5 ppm
Iron (Fe) ≤10 ppm
Complies with FCC / USP / EP standards (Food & Pharma Grade).
Packaging Options
Packaging Type Material Net Weight
HDPE Bags with Inner Liner Moisture-proof 25 kg
Kraft Paper Bags with LDPE Liner Eco-friendly 25 kg
Jumbo Bags (FIBC) For bulk use 500–1000 kg
Custom Packaging As per client request —
Storage & Shelf Life
Store in a cool, dry place away from moisture and direct sunlight.
Shelf life: 24 months under recommended conditions.
Typical Concentration in Use
0.05–0.5 M in bioprocess or enzyme stabilization systems
(Optimize based on specific process conditions.)
Product Advantages
- High purity and low heavy metal content
-Excellent compatibility with biological media
-Enhances process reproducibility and enzyme stability
-Suitable for both food and pharma bioprocessing applications
Storage & Shelf Life
Store in a cool, dry, and well-ventilated area, away from moisture and direct sunlight.
Shelf Life: 24 months from date of manufacture
Key Advantages
High assay purity (≥99.5%)
Chemically inert and physiologically compatible
Excellent flow and blending properties
Suitable for tablet, capsule, and powder formulations
Stable under compression and coating processes
Sodium Sulfate – Pharmaceutical Grade
(Inert Filler & Tablet Excipient)
Molecular Formula: Na₂SO₄ | Molecular Weight: 142.04 g/mol | CAS No.: 7757-82-6
