Sodium Sulfite Na2SO3 CAS 7757-83-7 Industrial Grade
Industrial grade sodium sulfite candidate, CAS 7757-83-7, Na2SO3, offered as powder with stated purity range 90%-99%. Buyer should verify grade, assay basis, impurity limits, packing, SDS/COA readiness, and export classification before RFQ confirmation.
Quick buying facts
Identify the grade, package, and import market before comparing suppliers.
Use this page to check the product identity, common specification points, document scope, package notes, and destination-market questions before sending a China sourcing request.
CAS 7757-83-7; formula Na2SO3; EINECS 231-821-4Inorganic salt; sodium sulfite powderCandidate for RFQ with document and spec verification
Share target market, quantity, packaging scope, artwork status, delivery destination, and required documents so CHN Chemicals can prepare a cleaner supplier comparison.
Questions to confirm
What exact assay and grade can be supplied for this lot?
Can you share recent COA with impurity and moisture limits?
What packing sizes are available for export orders?
Is the shipment classified as DG or non-DG by your SDS?
What MOQ, lead time, Incoterms, and sample policy apply?
Checks before quote
Request current SDS, COA, TDS, and packing list draft
Confirm HS code, export controls, and destination import rules
Verify DG status with SDS and carrier before shipment
Check any food, pharma, or water-treatment claims separately
Do not rely on marketplace ISO claim without certificate copy
Next step
Send the product page with your target quantity and market. A sourcing manager can then confirm sample options, supplier fit, packaging details, and open document gaps.