Preservation — Process Challenge

Metabisulfite & Sulfites for Enzymatic Browning

Polyphenol oxidase drives enzymatic browning and oxidative spoilage in wine, dried fruit and cut produce; need a sulfiting agent to release SO2
Why It Matters
Polyphenol oxidase drives enzymatic browning and oxidative spoilage in wine, dried fruit and cut produce; need a sulfiting agent to release SO2
Solution Approach

Polyphenol oxidase drives enzymatic browning and oxidative spoilage in wine, dried fruit and cut produce; need a sulfiting agent to release SO2 RawSource supplies the base chemicals that go into these programs. We can help with product selection, grade matching, and sourcing from multiple origins for supply security.

Typical Treatment Workflow
1
System Assessment
Characterize operating conditions—fluid composition, temperature, pressure, flow rates—and benchmark current treatment performance.
2
Chemistry Selection
Match base chemicals to your operating envelope. Factor in compatibility with existing programs, regulatory constraints, and downstream impacts.
3
Dosage & Delivery
Determine optimal treat rates through jar testing or field trials. Configure packaging (drums, totes, ISO tanks) to match consumption and storage logistics.
4
Monitoring & Adjustment
Track KPIs—coupon rates, residuals, separator performance, water quality. Adjust chemistry and dosage as conditions change.
Recommended Chemistries (3)
Potassium Metabisulfite (Technical/Food Grade)
CAS 16731-55-8
Specialty Additives
Preservation
1759 (POTASSIUM METABISULFITE) · Class
Releases SO2 that scavenges oxygen and inhibits polyphenol-oxidase browning in wine, dried fruit and juices
Melting Point: Decomposes at approximately 150 °C   Density: 2.3 g/cu cm   Solubility: Freely soluble in water; insoluble in alcohol
Full Details
Sodium Bisulfite
CAS 7631-90-5
Specialty Additives
Preservation
3260 (SODIUM BISULFITE) · Class
Bisulfite supplies SO2 for anti-browning and antimicrobial sulfiting of fruit, vegetables and beverages
Melting Point: Decomposes   Boiling Point: Decomposes   Density: 1.48 at 20 °C
Full Details
Sodium Sulfite, Anhydrous (Granular)
CAS 7757-83-7
Specialty Additives
Preservation
Sulfite scavenges oxygen to protect color and inhibit oxidative spoilage
Melting Point: Decomposes   Boiling Point: Decomposes   Density: 2.633 at 15 °C
Full Details

Need help selecting the right chemistry?

Our team can help with grade selection, dosage guidance, and multi-origin sourcing.

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