 Home > Inorganic Chemistry > Inorganic Salts > Sodium sulfite for Sale > Hot Sale 98% 97% Sodium Sulphite Na2so3 Anhydrous Sodium Sulfite

Hot Sale 98% 97% Sodium Sulphite Na2so3 Anhydrous Sodium Sulfite buy - large image1

Hot Sale 98% 97% Sodium Sulphite Na2so3 Anhydrous Sodium Sulfite buy - image1

Hot Sale 98% 97% Sodium Sulphite Na2so3 Anhydrous Sodium Sulfite buy - image2

Hot Sale 98% 97% Sodium Sulphite Na2so3 Anhydrous Sodium Sulfite buy - image3

Hot Sale 98% 97% Sodium Sulphite Na2so3 Anhydrous Sodium Sulfite buy - image4

Hot Sale 98% 97% Sodium Sulphite Na2so3 Anhydrous Sodium Sulfite

32 Inquiries

Unit Price: Get Latest Price 

CAS No.:

7757-83-7

Grade:

Industrial Grade

Content:

97%

Port:

Shanghai,Tianjin,qingdao

Brand:

ruisunny

Packaging:

25Kg / 50Kg / 200Kg / 1000 Kg or as your request

Price valid (until):

2023-12-31

Contact Supplier

 Chat Now

Wuhan Rui Sunny Chemical Co., Ltd.

Company Type:

Trader

Location:

China

Qualification:

Main Products:

Oxalic Acid,Trisodium Phosphate,ammonium bicarbonate,Cocoa Powder,Trichloroisocyanuric Acid,Sodium Percarbonate

 Visit Store

Product Description
Seller Information
Inquiry History

Description

Product Detail

Sodium sulfite is a white crystalline powder with a sulfurous odor. It is soluble in water and slightly soluble in alcohol. Its chemical formula is Na2SO3, and its molecular weight is 126.04 g/mol. Sodium sulfite is a reducing agent and can easily lose sulfur dioxide gas when exposed to air. Sodium sulfite is commonly used as a reducing agent and antioxidant in various industries, including food and beverage, water treatment, and photography. It is also used in the production of paper and pulp, as well as in the textile industry for dyeing and bleaching processes. Sodium sulfite is known to be a skin and eye irritant and can be harmful if ingested or inhaled in large quantities.

Certificate of Analysis

Items	Standard	Analytical result
Main content (Na2SO3)	96% min	96.80%
Fe	0.005%max	0.00%
Free alkali	0.1% max	0.10%
Sulfate (as Na2SO4)	2.5%max	2.00%
Water insolubles	0.02% max	0.01%
Conclusion	The goods up to the requirement of standard

Packaging&Shipping

APPLICATIONS

Food industry: Sodium sulfite is used as a food preservative to prevent the growth of bacteria and fungi. It is commonly used in dried fruits, wines, and meat products.
Photography: Sodium sulfite is used in developing solutions for photographic films and papers. It helps to remove the unexposed silver halides from the film, preventing further development.
Water treatment: Sodium sulfite is used in water treatment plants to remove excess chlorine from water. It acts as a reducing agent and helps to neutralize the chlorine, making the water safe for consumption.
Textile industry: Sodium sulfite is used as a bleaching agent and a reducing agent in the textile industry. It helps to remove color impurities from fabrics and improves the dyeing process.
Pulp and paper industry: Sodium sulfite is used in the production of pulp and paper. It helps to break down lignin, a natural polymer present in wood, and aids in the delignification process.
Chemical industry: Sodium sulfite is used in various chemical reactions as a reducing agent. It is also used in the production of dyes, chemicals, and pharmaceuticals.
Cosmetics industry: Sodium sulfite is used in some cosmetic products as a preservative and an antioxidant. It helps to prevent the growth of bacteria and oxidation of the product.
Gas scrubbing: Sodium sulfite is used in gas scrubbing processes to remove sulfur dioxide (SO2) from industrial flue gases. It reacts with SO2 to form sodium sulfate, which can be easily removed.

Basic Info

Product Name:

Sodium sulfite

Other Name:

Sulfurous acid,sodium salt (1:2);Sulfurous acid,disodium salt;Anhydrous sodium sulfite;Disodium sulfite;Sodium sulfite (Na2SO3);Sodium sulfite anhydrous;Sodium sulfite;Disodium sulfite (Na2SO3);S-WAT;E 221;68135-69-3

CAS No.:

7757-83-7

Molecular Formula:

H2O3S.2Na

InChIKeys:

InChIKey=YKZJGZHPDUVUKN-UHFFFAOYSA-N

Molecular Weight:

126.037

Exact Mass:

125.936356

EC Number:

231-821-4

UNII:

VTK01UQK3G

ICSC Number:

1200

DSSTox ID:

DTXSID2044260

NCI Thesaurus Code:

C28205

Color/Form:

Small crystals or powder|White hexagonal crystals|White crystals or powder

HScode:

28321000

Categories:

Inorganic Salts

Characteristics

PSA:

82.4

XLogP3:

-4

Appearance:

Sodium sulfite is a white odorless powder. Density 2.633 g / cm3. Moderately toxic. Sinks in water and dissolves slowly. Also transported as a heptahydrate Na2SO3.7H2O.

Density:

2.63 g/cm³

Melting Point:

>500°C

Boiling Point:

Decomposes (NTP, 1992)

Refractive Index:

1.484

Water Solubility:

H2O: 23 g/100 mL (20 ºC)

Storage Conditions:

Sodium sulfite should be stored in a well-closed container in a cool, dry, place. In solution, sodium sulfite is slowly oxidized to sulfate by dissolved oxygen; strong acids lead to formation of sulfurous acid/ sulfur dioxide. On heating, sodium sulfite decomposes liberating sulfur oxides.

Vapor Pressure:

Negligible (NTP, 1992)

Toxicity:

Non-toxic

Odor:

Odorless

Taste:

Saline, sulfurous taste

PH:

8,5-11,5 (anhydrous: 10 % solution; heptahydrate: 20 % solution)

Experimental Properties:

Density: 1.539. MP: decomposes; loses 7 H2O at 150 °C /Sodium sulfite heptahydrate/|Efflorescent crystals. Unstable, oxidizing in air to sulfate. Soluble in 1.6 parts water, about 30 parts glycerol; sparingly soluble in alcohol. Aqueous solution is alkaline and dissolves sulfur; pH approximately 9 /Sodium sulfite heptahydrate/

Air and Water Reactions:

Soluble in water. Reacts with hot water, steam or acids to produce corrosive material.

Reactive Group:

Sulfite and Thiosulfate Salts

Reactivity Alerts:

Strong Reducing Agent

Reactivity Profile:

SODIUM SULFITE is a reducing agent, particularly under basic conditions. Reacts with oxidizing agents such as peroxides, epoxides, oxoacids. Emits toxic fumes of sodium oxide and oxides of sulfur if heated to decomposition [Lewis, 3rd ed., 1993, p. 1174].

Autoignition Temperature:

Not flammable (USCG, 1999)

See More Sodium sulfite Properties 

Hazard Identification

Classification of the substance or mixture

Not classified.

GHS label elements, including precautionary statements

Precautionary statement(s)
Pictogram(s)	No symbol.
Signal word	No signal word
Hazard statement(s)	none
Prevention	none
Response	none
Storage	none
Disposal	none

Other hazards which do not result in classification

no data available

Handling and Storage

Precautions for safe handling

Handling in a well ventilated place. Wear suitable protective clothing. Avoid contact with skin and eyes. Avoid formation of dust and aerosols. Use non-sparking tools. Prevent fire caused by electrostatic discharge steam.

Conditions for safe storage, including any incompatibilities

Separated from strong oxidants and acids. Store in an area without drain or sewer access.

See More Sodium sulfite Safety Data Sheet 

Seller Information

Business Type:
Trader

Main Products:
Oxalic Acid,Trisodium Phosphate,ammonium bicarbonate,Cocoa Powder,Trichloroisocyanuric Acid,Sodium Percarbonate

Location:
22 Floor,Optical Valley lnternational Business Building A,NO.2-2Guandong Yuan Road,East Lake HI-TECH Development District Wuhan City,HubeiChina.

Payment Terms:
TT against copy of documents,D/P,L/C,TT against B/L draft before shipment,100% TT in advance

Average lead Time:
15

Total Annual Revenue:
$25 million-$50 million

Total Employees:
101-200

Year of Establishment:
2010

Certifications:
SGS,Hazardous chemical operating licence,Quality Management System Certificate Award,SGS

Company Profile
Wuhan Rui Sunny Chemical Co., Ltd. was established in 2010, which is a trading company specializing in the import and export of chemicals. The company mainly deals in water treatment agents, food additives, organic silicones, basic organic and inorganic chemicals, etc.

The company has a supporting logistics team and warehousing facilities, has a production base in Huanggang, Hubei Province, and an office in HA NOI, Vietnam. The company has ISO9000 certification, as well as a dangerous goods Business License.

We have built a foreign trade team that dares to fight hard based on the business philosophy of integrity, durability and Win-Win, and we have received the support from a large number of domestic and foreign customers. Driven by the marketing of main products, the company is determined to forge ahead, strive to develop, and the scale of market sales continues to expand. We operate more than 80 varieties of products, which have been exported to more than 60 countries or regions around the world. The product quality and service have been widely praised in the same industry.

Look forward to cooperate with you.

Inquiry History

32 Inquiries

Country	Product	Purchase Quantity	Date Posted
India	Sodium Sulfite anhydrous 98 %	200.00 KG	Apr 19, 2024
United States	SODIUM SULFITE NA2SO3 20% WT WATER 80% WT	400.00 L	Jun 23, 2026
Egypt	96% Sodium Sulfite	40 MT	Apr 30, 2026
South Africa	Sodium Sulphite	50 MT	Feb 18, 2026
India	Sodium sulphite	10.00 MT	Feb 11, 2026
United States	Sodium Sulfite	1 MT	Nov 26, 2025
Qatar	Sodium Sulphite (Na2SO3)	10.00 MT	Jun 20, 2025
Saudi Arabia	Sodium Sulfite	1 KG	Jun 5, 2025
India	sodium sulfite	20.00 TON	Apr 1, 2025
Qatar	Sodium Sulphite	25 TON	Dec 23, 2024
Kuwait	Sodium Sulfite Anhydrous	12800 MT	Jul 25, 2024
Vietnam	Sodium Sulphite	27 TON	Jul 1, 2024
India	Sodium sulphite	1.00 MT	Jun 26, 2024
India	Sodium Sulphite	20.00 MT	May 20, 2024
Myanmar	SODIUM SULFITE	26 TON	Jan 24, 2024
United Arab Emirates	Sodium sulfite 96%	25.00 KG	Jul 24, 2025
Russia	sodium sulfite, anhydrous	100 TON	Jul 23, 2025
Kuwait	ANHYDROUS SODIUM SULPHITE	12800 MT	Jul 25, 2024
Trinidad and Tobago	Sodium sulfite 98% white powder	31.2 MT	Nov 3, 2023
India	Allyl bromide	4000 KG	May 11, 2026

Go to Page

Post an enquiry for this product

More Choices Find All Products for Sale 

Product Name	Grade / Content	Price	Supplier Name	Details
Sodium Sulphite - Tech Grade	Industrial Grade/	$525-575/MT FOB	Aditya Birla Chemicals Thailand Limited	Inquiry
Sodiumsulfite Food Grade	Food Grade /		BOYU CHEMICAL CO., LIMITED	Inquiry
Sodiumsulfite bulk sell	Industrial Grade/		Zhuzhou Jinqiao Zinc Industrial Co.,Ltd	Inquiry
Sodiumsulfite Technical Grade	Industrial Grade/		Yueyang Sanxiang Chemical Co.,Ltd	Inquiry
90% 92% Industry Food Grade Na2so3 7757-83-7 Powder Sulphite Sodium Sulfite Price	Industrial Grade/96	$390-507/MT FOB	Mudanjiang Fengda Chemicals Imp.& Exp. Corp.	Inquiry

Sodium sulfite Market Price

Hot Related Products



Feedback & Suggestions

Send Message

Thank you for your feedback. If you require further assistance, please contact us by email at info@echemi.com or call us at +86-532-55729510.