Sodium sulfite
32 Inquiries
7757-83-7
99%
Bottle,barrel,cargo,container,etc.
2026-08-11
Intermediates,Building blocks,API,Silicones,Peptides,Lab chemicals
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Product Description
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Seller Information
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Inquiry History
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DescriptionKeywords
7757-83-7
Sodium sulfite
Na2SO3
Quick DetailsProName:Sodium sulfite
CasNo:7757-83-7
Molecular Formula:Na2SO3
Appearance:powder, or liquid
Application:Pharmaceuticals, intermediates, APIs, custom synthesis, chemicals
DeliveryTime:5-7 Days
PackAge:Bottle, barrel, cargo, container, etc.
Port:Shanghai
Purity:99
Storage:Stored in room temperature, ventilated place
Transportation:By air, ship, express, etc.
LimitNum:0
Grade:Industrial Grade
SuperiorityBest Seller, High Quality, Competitive Price, Fast Delivery, Quick Response
DetailsLEAPChem supplies high quality Pharmaceuticals, intermediates, APIs, custom synthesis, fine chemicals and other industrial chemicalsBasic 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:
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)
Hazard IdentificationClassification of the substance or mixture
Not classified.
GHS label elements, including precautionary statements
Pictogram(s) No symbol. Signal word No signal word
Hazard statement(s) none
Precautionary statement(s) Prevention none
Response none
Storage none
Disposal none
Other hazards which do not result in classification
no data available
Handling and StoragePrecautions 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.
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Seller Information
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Business Type:
Trader
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Main Products:
Intermediates,Building blocks,API,Silicones,Peptides,Lab chemicals
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Location:
Room A, 23rd Floor, No. 609 Yan'an Road, Gongshu District, Hangzhou, Zhejiang
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Payment Terms:
TT against copy of documents,D/P,L/C
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Average lead Time:
5
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Total Annual Revenue:
Above $100 million
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Year of Establishment:
2020
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Certifications:
ISO
">Company ProfileLEAPChem is a specialized fine chemical supplier for research, development and production.
LEAPChem provides nearly 200,000 rare and innovative chemical products to support the evolving needs of our customers in research & bulk manufacturing activities.
As a highly customer-oriented enterprise, we are committed to providing high-quality customer services and products to our global customers in a cost-effective and efficient manner.
Our client list includes many major pharmaceutical and science companies, universities, research institutions and chemical catalogue companies.
Methodology: Sound & Stable; Active & Innovative.
Attitude: Conscientious; Ingenious.
Goals: Customer's Satisfaction
We regard client's success as our success.
At LEAPChem, we strive to be the preferred supplier for efficiency increasing and cost lowering in your Research & Production.
To achieve this strategic vision, we always push ourselves to exceed our customer's requirement. By focusing on the aim of 'Beyond Your Expectation', we continually expand our product lines, and enhance our systematic management and human resources.
Welcome to contact us and we look forward to becoming your reliable and preferred partner.
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Inquiry History32 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 Post an enquiry for this product
