Anhydrous Sodium Sulfite Overview
Anhydrous sodium sulfite with 96%+ purity for photographic developing, pulp bleaching and wastewater treatment. Buyers usually compare grade, packing, destination port, sample approval and required documents before confirming a quote.
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Specifications
| Item | Details |
|---|---|
| Grade | Industrial |
| Purity | 96%+ |
| Main Use | Developing, bleaching, wastewater treatment, synthesis |
| 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 Sulfite Supplier Proof and RFQ Checklist
Before sending a purchase order, buyers should confirm the supplier can match the exact Na2SO3 assay, insoluble matter, iron limits, anhydrous grade, oxygen scavenger use, and packaging protection. This section is designed for procurement teams comparing real bulk supply, not casual retail purchases.
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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 Sulfite Procurement Decision Guide
Use this section to qualify sodium sulfite 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.
- Na2SO3 assay
- sulfate
- chloride
- iron
- water insoluble matter
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 |
|---|---|
| Anhydrous sodium sulfite | Confirm assay, appearance, moisture and target application before comparing offers. |
| industrial grade by order | Confirm assay, appearance, moisture and target application before comparing offers. |
| food or technical inquiry by requirement | Confirm assay, appearance, moisture and target application before comparing offers. |
Application Fit
| Application | What to confirm |
|---|---|
| Oxygen Scavenger | 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. |
| Pulp And Textile Processing | Share process conditions, target market and required documents so the correct grade can be matched. |
| Dechlorination | 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 Sulfite Orders
Define the process need
Sodium sulfite for oxygen scavenging, dechlorination, textile or pulp processing should be checked against the process conditions. Share dosage target, water quality or application background when possible.
Check stability items
Compare Na2SO3 assay, sulfate, chloride, iron, moisture and appearance. Storage and packing also matter because product quality can change if bags are exposed to air and humidity for too long.
Set a sampling rule
For a new supplier, request a recent COA and sample before confirming repeat bulk orders. Keep the same testing method for future shipments so changes are easier to detect.