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Sodium Bisulfite NaHSO3 CAS 7631-90-5 Assay 58.5%-67.4% (Titration, as SO2) Featured Image
  • Sodium Bisulfite NaHSO3 CAS 7631-90-5 Assay 58.5%-67.4% (Titration, as SO2)
  • Sodium Bisulfite NaHSO3 CAS 7631-90-5 Assay 58.5%-67.4% (Titration, as SO2)

Sodium Bisulfite NaHSO3 CAS 7631-90-5 Assay 58.5%-67.4% (Titration, as SO2)

Short Description:

Chemical Name: Sodium Bisulfite

Synonyms: Sodium Hydrogen Sulfite; NaHSO3

CAS: 7631-90-5

Assay: 58.5%-67.4% (by Titration, as SO2)

Appearance: White to Off-White Crystalline Powder

Reducing Agent Food Preservatives and Bleaching Agent

Contact: Dr. Alvin Huang

Mobile/Wechat/WhatsApp: +86-15026746401

E-Mail: alvin@ruifuchem.com


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7631-90-5 - Description:

Shanghai Ruifu Chemical is the leading manufacturer of Sodium Bisulfite (NaHSO3) (CAS: 7631-90-5) with high quality, used as a reducing agent, food preservative and bleaching agent. Ruifu Chemical has been supplying Sodium Bisulfite more than 15 years, can provide worldwide delivery, competitive price, excellent service.
Purchase Sodium Bisulfite (NaHSO3), please contact us by e-mail: alvin@ruifuchem.com

7631-90-5 - Chemical Properties:

Chemical Name Sodium Bisulfite
Synonyms Sodium Hydrogen Sulfite; NaHSO3
Stock Status In Stock, Production Capacity 80000 Tons per Year
CAS Number 7631-90-5
Molecular Formula NaHSO3
Molecular Weight 104.06 g/mol
Melting Point 150℃
Density 1.48
Water Solubility  Soluble in Water 
Odor Slight Odor of Sulfur Dioxide
Storage Temperature Store Long-Term in a Cool and Dry Place
Stability Stable. Incompatible With Strong Oxidizing Agents, Strong Acids.
COA & MSDS Available
Sample  Available
Origin of Product    Shanghai, China
Brand Ruifu Chemical

7631-90-5 - Specifications:

Items Specifications  Results
Appearance White to Off-White Crystalline Powder  White Crystalline Powder 
Assay / Analysis Method 58.5%-67.4% (by Titration, as SO2)   65.2%
Water Insoluble Matter  ≤0.03% ≤0.02%
Chloride (Cl) ≤0.05% ≤0.04%
Iron (Fe)    ≤0.004% ≤0.001%
Heavy Metals (Pb) ≤0.001% <0.001%
Arsenic (As) ≤0.002% <0.0002% 
pH Value (500g/L Solution) 4.0-5.0 4.8
Conclusion The product has been tested and complies with the given specifications

7631-90-5 - Package/Storage/Shipping:

Package: Package: 2-layer PE bag, Net Weight Per Bag: 25kgs or 1250kgs, or according to requirement.
Storage Condition: Keep the container tightly closed. Store in a cool, dry and well-ventilated warehouse away from incompatible substances. Keep away from sunshine; avoid fire and heat sources; avoid moisture.
Shipping: Deliver to worldwide by air, by FedEx / DHL Express. Provide fast and reliable delivery. 

7631-90-5 - Advantages:

Sufficient Capacity: Sufficient facilities and technicians

Professional Service: One stop purchasing service

OEM Package: Custom package and label available

Fast Delivery: If within stock, three days delivery guaranteed

Stable Supply: Maintain reasonable stock    

Technical Support: Technology solution available

Custom Synthesis Service: Ranged from grams to kilos

High Quality: Established a complete quality assurance system

7631-90-5 - FAQ:

How to Purchase? Please contact Dr. Alvin Huang: sales@ruifuchem.com or alvin@ruifuchem.com 

15 Years Experience? We have more than 15 years of experience in the manufacture and export of a wide range of high quality pharmaceutical intermediates or fine chemicals.

Main Markets? Sell to domestic market, North America, Europe, India, Korea, Japanese, Australia, etc.

Advantages? Superior quality, affordable price, professional services and technical support, fast delivery.

Quality Assurance? Strict quality control system. Professional equipment for analysis include NMR, LC-MS, GC, HPLC, ICP-MS, UV, IR, OR, K.F, ROI, LOD, MP, Clarity, Solubility, Microbial limit test, etc.

Samples? Most products provide free samples for quality evaluation, shipping cost should be paid by customers.

Factory Audit? Factory audit welcome. Please make an appointment in advance.

MOQ? No MOQ. Small order is acceptable.

Delivery Time? If within stock, three days delivery guaranteed.

Transportation? By Express (FedEx, DHL), by Air, by Sea.

Documents? After sales service: COA, MOA, ROS, MSDS, etc. can be provided.

Custom Synthesis? Can provide custom synthesis services to best fit your research needs.

Payment Terms? Proforma invoice will be sent first after confirmation of order, enclosed our bank information. Payment by T/T (Telex Transfer), PayPal, Western Union, etc. 

7631-90-5 - Risk and Safety:

Hazard Symbols Xn - Harmful
Risk Codes
R22 - Harmful if swallowed
R31 - Contact with acids liberates toxic gas
R41 - Risk of serious damage to eyes
R52 - Harmful to aquatic organisms
Safety Description
S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice.
S39 - Wear eye / face protection.
S46 - If swallowed, seek medical advice immediately and show this container or label.
S25 - Avoid contact with eyes.
UN IDs UN 2693
WGK Germany 1
RTECS UX8225000
HS Code 2832100000
Packing Group III

7631-90-5 - Application:

Sodium Bisulfite (NaHSO3) (CAS: 7631-90-5) is used as reducing agent, food preservative and bleaching agent.
Sodium Bisulfite is used for the bleaching of cotton fabrics and organic materials.
And used as a reducing agent in dyestuff, papermaking, tanning, chemical synthesis and other industries.
In the pharmaceutical industry, it is applied to produce intermediates of metamizole and aminopyrine.
Serves as bleaching agent, preservative, and antioxidant food grade products.
And used as a plating additive in the treatment of chromium-containing waste water. 

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