Product identity and grade
State exact identity, grade, concentration or form, process role, quantity, packing, destination and documents.
Mining chemical · Reducing agent and oxygen scavenger
Sodium Metabisulfite (SMBS) for Mining & Mineral Processing
Sodium metabisulfite is a reducing sulfite reagent evaluated for flotation depression, dissolved-oxygen control, dechlorination and selected hydrometallurgical operations.
- Identity
- CAS 7681-57-4; Na2S2O5
- Form
- Powder or solution prepared for controlled use
- Process basis
- Ore, water and flowsheet specific
- Specification
- Contact sales
Product image · confirm grade and packaging when ordering
Share exact chemistry, process role, ore or water context, quantity, destination and documents.
ApplicationOre and flowsheet specific
SpecificationAvailable privately from sales
ValidationLaboratory and pilot work required
ControlsSDS and site engineering required
Direct product answer
What is Sodium Metabisulfite (SMBS) used for in mining?
Sodium metabisulfite is a reducing sulfite reagent evaluated for flotation depression, dissolved-oxygen control, dechlorination and selected hydrometallurgical operations.
Performance depends on the exact commercial grade, mineralogy, liberation, pulp and recycle-water chemistry, upstream and downstream reagents, equipment and control strategy. This page supports procurement screening and is not a plant operating instruction.
Procurement snapshot
- Product
- Sodium Metabisulfite (SMBS)
- Identity
- CAS 7681-57-4; Na2S2O5
- Form
- Powder or solution prepared for controlled use
- Process role
- Reducing agent and oxygen scavenger
- Qualification
- Ore, water and circuit specific
- Product specification
- Request the offered grade’s specification
Procurement checklist
How to source Sodium Metabisulfite (SMBS) for mining
Compare the offered grade, application requirements and commercial terms before requesting a sample or placing an order.
Quotation and delivery basis
Compare private specification, active or assay basis, representative COA, transport classification, Incoterm and lead time.
Application and process requirements
Share mineralogy, flowsheet stage, water chemistry, existing reagent suite, target response and test protocol.
Technical and quality documents
Request current SDS, private specification or TDS, methods, batch COA, traceability and source-specific documents.
Process screening
Sodium Metabisulfite (SMBS) mining application guide
These are testwork areas—not universal recommendations, dosage instructions, recovery guarantees or permit approvals.
Sulfide or non-sulfide flotation test programs
Select representative ore and confirm the proposed reagent's specific role. Hold grind, solids and water conditions constant when comparing sources.
Collector, frother, activator or depressant screening
Specify the single duty required from this material in the reagent suite. Compare candidates for that duty rather than treating all flotation reagents as interchangeable.
Rougher, scavenger and cleaner circuit optimization
Identify the circuit stage and its recovery or selectivity target. Measure the impact on downstream stages as well as the immediate cell response.
Ore-specific reagent-suite development
Test compatibility with the approved collector, frother and modifier program. Record addition order, conditioning and changes in froth transport.
Technical selection
Questions to resolve before approving Sodium Metabisulfite (SMBS)
Exact reagent chemistry and active concentration
Specify the individual chemistry or formulation and its active-content basis. Do not use an acronym or commercial family name as the only acceptance criterion.
Ore mineralogy, liberation and pulp-water chemistry
Provide representative mineralogy, particle-size distribution and process-water analysis. Include seasonal or recycle-water changes that can alter the comparison.
PH, Eh, conditioning order and reagent interactions
Record pH, redox where relevant, addition sequence and conditioning time. Use matched operating conditions to separate grade effects from process variation.
Concentrate quality, recovery, tailings and aquatic risk
Assess concentrate grade and recovery together with tailings and water quality. Confirm the site's environmental acceptance criteria for the proposed reagent.
Private technical documentation
Request the current Sodium Metabisulfite (SMBS) product specification
Bespring Chemical does not publish product specifications for this mining chemical online. Contact sales for the current source-specific specification or TDS and confirm its revision, methods and acceptance criteria.
Product documents
Request the signed current specification or TDS, SDS, analytical methods, representative COA and batch COA.
Safety and logistics
Confirm hazard and transport classification, compatible packing, storage segregation, shelf life and emergency controls.
Authoritative context
Review the US EPA hardrock-mining source book, the EPA ore-mining and dressing technical document, USGS mineral-processing context and NIH PubChem.
Mining-process note: A raw-material identity does not establish recovery, selectivity, dosage or environmental acceptability. Use representative metallurgical or water testwork, qualified engineering, site permits and monitored residue, effluent, air and worker controls.
Storage and handling
Handle Sodium Metabisulfite (SMBS) under the current SDS
- Source instructionsFollow the current SDS and private specification for storage temperature, ventilation, segregation and shelf life.
- IncompatibilitiesKeep away from incompatible acids, alkalis, oxidants, reductants, moisture, ignition sources or metals identified for the exact product.
- Engineered controlsUse suitable closed transfer, dust or vapor control, containment, PPE, gas monitoring where relevant and trained emergency procedures.
Mining buyer questions
Sodium Metabisulfite (SMBS) FAQ
What is Sodium Metabisulfite (SMBS) used for in mining?
Sodium metabisulfite is a reducing sulfite reagent evaluated for flotation depression, dissolved-oxygen control, dechlorination and selected hydrometallurgical operations. Suitability must be established for the specific ore, water, flowsheet and site.
Which Sodium Metabisulfite (SMBS) grade should mining buyers specify?
CAS 7681-57-4; Na2S2O5; Powder or solution prepared for controlled use. State the exact chemistry, grade, active concentration, physical form and critical impurity limits.
Why is there no public specification?
Bespring Chemical does not publish specifications for this mining chemical online. Contact sales for the current source-specific specification or TDS, methods and representative COA.
Does this page provide a mining reagent dosage?
No. Reagent selection, dosage, conditioning order and control limits require representative mineralogical, metallurgical or water-treatment testwork and qualified site engineering.
What should the mining RFQ include?
Provide the exact identity, grade or concentration, process role, ore or water context, critical limits, quantity, packing, destination, documents, Incoterm and delivery date.
Content updated 2026-09-13.
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Specification-led mining supply
Request a Sodium Metabisulfite (SMBS) specification and quote
Share identity, grade or concentration, process role, ore or water context, critical limits, quantity, packing, destination and documents.
- Current private specification or TDS
- Representative and batch COA
- SDS, packing and transport confirmation
- Source-specific documents on request
Product documents
Request documents
Tell us your grade and destination market so we can confirm which documents are available for your order.
An external reference is not a batch certificate or a Bespring product specification.