Sodium Bisulfite 15% ACS Grade

Name: Quick Facts: Sodium Bisulfite 15% ACS Grade
Creator: Alliance Chemical
License: https://alliancechemical.com/policies/terms-of-service

Sodium Bisulfite

Active ingredient: sodium bisulfite, also known as sodium hydrogen sulfite · sodium bisulphite · sodium acid sulfite
CAS number: 7631-90-5
Formula: NaHSO3
Molecular weight: 104.06 g/mol
Concentration: 15%
Grade: ACS Reagent Grade
Appearance: Clear, colorless to pale yellow liquid with sulfur odor
Boiling point: 100°C (solution)

How it is classified for shipping

UN number: UN2693
Hazard class: 8 Corrosive
Packing group: III

Proper shipping name Bisulfites, aqueous solutions, n.o.s.

Hazards

Signal word Danger

Corrosive
Irritant

Summary only. Read the SDS and the container label for complete hazard and handling information.

SDS also in

Who uses it

Analytical testing laboratories, Research and development teams, Water treatment professionals, Industrial process operators

Water & Environmental

Representative industry photos.

Product quick facts

CAS 7631-90-5NaHSO3UN2693

Sodium Bisulfite 15% ACS Grade (CAS 7631-90-5) is a 15% ACS reagent-grade liquid with molecular formula NaHSO3 and a molecular weight of 104.06 g/mol, meeting American Chemical Society specifications for analytical use. Its active ingredient, sodium bisulfite, is also known as sodium hydrogen sulfite, sodium bisulphite and sodium acid sulfite. It ships as DOT Hazard Class 8. Alliance Chemical supplies this product in 7 container sizes from 1 Quart to 330 Gallon (16 pack options) with 1-2 business day shipping from Taylor, TX on in-stock orders, plus SDS and lot-specific Certificate of Analysis.

Pack sizes 7 container sizes (1 Quart to 330 Gallon) · 16 pack options
Purity / spec 15% ACS Reagent Grade
Lead time In-stock orders placed by Mon-Thu 2 PM CT / Fri 12 PM CT typically ship within 1-2 business days.
Regional availability View state-by-state shipping pages

Request Bulk Quote (512) 365-6838

Stock footage.

How it ships.

Regulated products are packed, marked, and labeled for hazmat transport, from one quart to a pallet of drums.

Most stocked orders ship in 1–2 business daysOrder cutoff: Mon-Thu 2 PM CT / Fri 12 PM CT
Hazmat packing, marking, and labelingPacked by staff trained under DOT rule 49 CFR 172.704
UPS Ground for bottles, jugs, and up to three pailsLTL freight for four or more pails, drums, and totes. Liftgate on request.

Ships with
FedEx Freight
Southeastern Freight Lines

Buying for a company or agency?

Pay by card at the listed price, or order on Net 30 terms once your credit is approved. For NSN and contract requirements, send an RFQ.

CAGE code: 1LT50
UEI: DCTCZDY3BLD3
Primary NAICS: 424690
Ownership: Woman-Owned
Federal supply: DLA Supplier
Terms: Net 30 on approved credit, W-9 on request

Apply for Net 30 Email a purchase order Vendor qualification documents

Gloved hands strapping four blue chemical drums to a pallet at a warehouse loading dock — Illustration.

Safety data sheets and certificates.

Find an SDS or TDS by product name or CAS number. Certificates of analysis are free on request.

Find an SDS or COA

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Description
Product Documents
Chemical Profile

Product Overview

Sodium Bisulfite 15% ACS Grade is a pre-diluted aqueous solution of sodium bisulfite (NaHSO3) prepared with high-purity deionized water. This 15% concentration provides a convenient, ready-to-use form that eliminates the need for on-site dilution of concentrated stock. Appearance: Clear, colorless to pale yellow liquid with sulfur odor. Meeting ACS Reagent Grade specifications, this product is suitable for analytical and laboratory applications requiring controlled purity and documented impurity limits.

Supplied by Alliance Chemical in sizes ranging from 1 quart to 330-gallon IBC totes, this solution is ideal for operations requiring consistent 15% strength with minimal handling risk compared to higher concentrations.

Key Properties

Chemical Name: Sodium Bisulfite
Synonyms: Sodium Hydrogen Sulfite, NaHSO3
Chemical Formula: NaHSO3
CAS Number: 7631-90-5
Molecular Weight: 104.06 g/mol
Concentration: 15% (w/w)
Grade: ACS
Specific Gravity (20°C): 1.130
Boiling Point: 100°C (solution)
Flash Point: N/A
Appearance: Clear, colorless to pale yellow liquid with sulfur odor
Solubility: Highly soluble in water

Common Applications

Dechlorination: Removes residual chlorine from treated wastewater and process water prior to discharge or reuse.
Water Treatment: Oxygen scavenger used in boiler feedwater treatment and cooling systems to prevent corrosion.
Food Preservation: Antioxidant and preservative used to prevent browning and microbial growth in food products.
Pulp & Paper Processing: Bleaching agent and lignin solubilizer in pulp production and paper manufacturing.
Photography & Developing: Fixing agent and preservative in photographic processing solutions.

Safety Precautions

Sodium Bisulfite solutions release sulfur dioxide gas, which is irritating to the respiratory tract. Handle in well-ventilated areas. Do not mix with acids — this accelerates SO2 release. Store in tightly sealed HDPE containers in a cool, dry location.

PPE Requirements: Wear chemical-resistant gloves, safety goggles, and respiratory protection if ventilation is inadequate. In case of inhalation, move to fresh air immediately. In case of skin or eye contact, rinse with water for at least 15 minutes. Refer to the Safety Data Sheet (SDS) for full handling and emergency procedures.

Shipping: UN 2693, Bisulfites, aqueous solutions, Class 8, PG III.

Benefits

Ready-to-Use Solution: Pre-diluted concentration simplifies dosing and reduces exposure to concentrated reagent.
Reliable Reducing Power: Consistent bisulfite content for predictable dechlorination and oxygen scavenging performance.
Scalable Supply: Available from small containers to bulk totes for any treatment or processing operation.

Frequently Asked Questions About Sodium Bisulfite 15% ACS Grade

What is Sodium Bisulfite 15% ACS Grade and what is its chemical formula?

Sodium Bisulfite 15% ACS Grade is listed under CAS 7631-90-5 (PubChem reference search). The catalog formula is NaHSO3. The listed molecular weight is 104.06 g/mol. For solutions and blends, identity values may describe a constituent; consult the product SDS for composition.

What are the physical properties of Sodium Bisulfite 15% ACS Grade?

Catalog reference information for Sodium Bisulfite 15% ACS Grade: form: Liquid; appearance: Clear, colorless to pale yellow liquid with sulfur odor; melting point: -9 °C (16 °F), freezing point (aqueous solution); boiling point: 100°C (solution); specific gravity: 1.13; solubility: Highly soluble in water; reference values may describe a pure substance rather than the supplied concentration or blend. Confirm applicable conditions and specifications in the product documents; these values are not batch test results.

What grade and purity of Sodium Bisulfite 15% ACS Grade does Alliance Chemical offer?

Alliance Chemical lists Sodium Bisulfite 15% ACS Grade in ACS reagent grade with a concentration or assay of 15%. Check the product specification for the measurement basis and acceptance limits. A grade label alone does not establish certification or suitability for a regulated application. For batch results, request a COA using the product name and lot number.

What are common industrial applications of Sodium Bisulfite 15% ACS Grade?

Catalog industry categories for Sodium Bisulfite 15% ACS Grade include Food & Agriculture, Water & Environmental. To evaluate it for your process, compare the listed grade, concentration and product specifications with your requirements. Contact Alliance Chemical to confirm any application-specific documentation or certification before ordering.

What are the hazards of Sodium Bisulfite 15% ACS Grade and where do I find handling guidance?

Per its GHS classification (SDS Section 2), Sodium Bisulfite 15% ACS Grade carries the signal word Danger and the following hazard statements: H302 HARMFUL IF SWALLOWED; H318 CAUSES SERIOUS EYE DAMAGE; EUH031 CONTACT WITH ACIDS LIBERATES TOXIC GAS. Product-specific first aid, fire-fighting, spill response, handling, storage, exposure controls/PPE, and disposal guidance are in SDS Sections 4-8 and 13 — always consult the SDS before use. Download the SDS.

What is the DOT shipping classification for Sodium Bisulfite 15% ACS Grade?

The catalog transport entry lists UN2693, hazard class 8, packing group III. Consult SDS Section 14 and confirm the requirements for your selected pack size and shipping destination with Alliance Chemical.

How must Sodium Bisulfite 15% ACS Grade waste be disposed?

Consult SDS Section 13 for disposal information for Sodium Bisulfite 15% ACS Grade. Disposal requirements depend on the resulting waste, contamination and location. Have your site's responsible waste professional determine the appropriate waste classification and disposal method. View the SDS.

Does Alliance Chemical provide an SDS and COA for Sodium Bisulfite 15% ACS Grade?

Search the document library for Sodium Bisulfite 15% ACS Grade. The SDS is also available here. A sample COA describes specifications and does not establish the results for your shipment. To request a lot-specific COA or confirm document availability, contact Alliance Chemical with the product name and lot number.