Sodium Metabisulfite Overview
Food and industrial grades with 96.5%+ purity for food preservation, bleaching, water treatment and flotation. Buyers usually compare grade, packing, destination port, sample approval and required documents before confirming a quote.
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Specifications
| Item | Details |
|---|---|
| Grade | Food / Industrial |
| Purity | 96.5%+ |
| Main Use | Preservative, bleaching, water treatment, flotation |
| Packing | 25kg bags |
What Buyers Confirm Before Ordering
Before sampling or bulk supply, most importers confirm the target grade, particle form, export packing, destination market documents and whether the product is intended for industrial or food-related use.
Export Packing and Documents
Sodium Metabisulfite Supplier Proof and RFQ Checklist
Before sending a purchase order, buyers should confirm the supplier can match the exact assay, SO2 content, heavy metals, food or industrial grade, water treatment or mining use, and document requirements. This section is designed for procurement teams comparing real bulk supply, not casual retail purchases.
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Procurement Guides and Applications
Get a Quote
Share the target purity, packing, destination port and order quantity. We will reply with a quotation soon.
Bulk Buyer Decision Guide
Sodium Metabisulfite Procurement Decision Guide
Use this section to qualify sodium metabisulfite supplier offers before requesting a formal quotation. The goal is to compare suppliers on the same basis: grade, specification, application fit, packing, documents, delivery terms and after-sales communication.
Grade and Specification Checks
Do not compare price only by product name. Confirm the exact grade and the limits that affect your process.
- Na2S2O5 assay
- SO2 content
- iron
- water insoluble matter
- pH by solution
Packing and Export Documents
Ask for packing photos, label language and palletizing details before shipment. Final loading quantity should be confirmed by product density, bag size and destination requirements.
- 25kg bags
- 50kg bags
- palletized packing by order
- COA, SDS, packing list, invoice and other export documents by order requirement
Common Grade Comparison
| Option | Buyer check |
|---|---|
| Industrial grade sodium metabisulfite | Confirm assay, appearance, moisture and target application before comparing offers. |
| food grade by requirement | Confirm assay, appearance, moisture and target application before comparing offers. |
| mining flotation grade by order | Confirm assay, appearance, moisture and target application before comparing offers. |
Application Fit
| Application | What to confirm |
|---|---|
| Mining Flotation | Share process conditions, target market and required documents so the correct grade can be matched. |
| Water Treatment | Share process conditions, target market and required documents so the correct grade can be matched. |
| Food Preservative By Regulation | Share process conditions, target market and required documents so the correct grade can be matched. |
| Textile And Industrial Reducing Agent | Share process conditions, target market and required documents so the correct grade can be matched. |
RFQ Checklist
Send product name, grade, quantity, destination port, packing, trade term, required documents and target delivery window.
Price Factors
Bulk price changes with assay, form, packing, order volume, freight route, pallet requirement and seasonal demand.
Sample Review
For new suppliers, request a sample or recent COA before bulk order confirmation when your application is sensitive.
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Buyer Notes for Sodium Metabisulfite Supply
Confirm grade and use
Sodium metabisulfite for water treatment, mining flotation, food-related inquiry or industrial use should be checked against the required grade, document basis and destination rules.
Check freshness factors
Review assay, SO2 content, iron, clarity, appearance and packing date when relevant. Moisture and air exposure can affect product condition, so sealed packing and storage matter.
Prepare document needs
Tell the supplier if you need COA, SDS, certificate wording, label language or destination-specific documents. Early confirmation avoids shipment delays caused by paperwork mismatch.