Sodium sulfite CAS 7757-83-7

Product name:Sodium sulfite
CAS：7757-83-7
MF：Na2O3S
MW：126.04
EINECS:231-821-4

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Model:
7757-83-7
Brand:
futurechem
Code:
7757-83-7

Product Description

Product Description

Product name:Sodium sulfite

CAS：7757-83-7

MF：Na2O3S

MW：126.04

EINECS:231-821-4

Applicatiuon：

Used as a developer, preparation of cellulose sulfite ester, preparation of sodium thiosulfate, preservative for dried fruits and meat, deoxidizer in printing and dyeing industry, and as reducing chemical reagent, used in chemical industry and laboratory production and synthesizing

Specifications :

Item	Quality Index
	Industry Grade	Food Grade
Purity ( As Na2SO3)	96.0% min	98.0% min
Sodium sulphate ( SO4)	2.0% max	1.2% max
Chlorides ( As NaCL)	0.5% max	0.08% max
Arsenic ( As )	-	0.0002% max
Heavy metals ( As Pb )	-	0.0005% max
Iron (Fe)	0.005% max	0.003% max
Water insoluble	0.05% max	0.01% max

公司信息

Sodium sulfite CAS 7757-83-7 Na2O3S

Quality Assurance

Full-Process Quality Control: From incoming raw material inspection to in-process monitoring and final outgoing checks, every batch is inspected at each production stage against strict acceptance standards.
Third-Party Certified & Tested: Our quality management system is certified to ISO 9001, and products are regularly tested by accredited laboratories (e.g. SGS, TÜV). Test reports are available on request.
100% Batch Traceability: Each batch carries a unique lot number that links raw material records, production parameters, and test results, enabling complete traceability from factory to final delivery.
Pre-Shipment Inspection: Every order passes a final pre-shipment inspection, with inspection photos and reports shared before dispatch.

FAQ From Customers

Q1: What is the minimum order quantity?

A: There is no quantity limit for the first sample or trial order. Just tell us the actual quantity you need.
Q2: How can I confirm that the quality meets the requirements?

A: Provide your specifications, and our technical team will check them or customize them for you; we can provide TDS, MSDS, and COA, and accept third-party testing.
Q3: How do you ensure stable quality?

A: We manufacture under an ISO 9001 quality system, test every batch before release, and retain samples for 24 months for traceability.
Q4: Do you provide samples?

A: Yes — Free samples are available; freight is at buyer's expense for express delivery.