POTASSIUM METABISULFITE Bulk Supply for Industrial Use
China Factory Direct
 |
|
| CAS number | 16731-55-8 |
| Product name | POTASSIUM METABISULFITE |
| Stock | Stock readily available; annual supply capacity exceeding 1,000 tons. |
| Grade | Industrial Grade |
| Packaging | 25KG/bag500KG/bag1000KG/bag |
| Sample | Test Samples Available (Click to Request Samples) |
| COA | View COA |
| Price | Get Quote |
| Supply Type | Bulk / Contract manufacturing / OEM |
| Shipping | FCL / LCL available |
| Payment Terms | Support FOB \ CIF \ EXW quotations, and accept Letter of Credit (L/C). |
| Manufacturer | Greenrock Chemical(China Factory) |
QUOTE TYPE
PACKAGING TYPE
TOTAL QUANTITY(KG)
PREFERRED SHIPPING METHOD
YOUR COMPANY
YOUR E-MAIL
Calculate Summary
Based on current marketvolatility and material availability.
Documents We Provide for POTASSIUM METABISULFITE
Post-sale: Full documentation is provided.
To request documents, please contact us via email at sales@GRchemical.com.
Bulk POTASSIUM METABISULFITE Supplier from China
17+ years in chemical exports.Fully compliant, reliable supply.Your B2B partner in bulk chemical procurement.
Industrial Applications of POTASSIUM METABISULFITE
| Industry | Application | Process |
|---|---|---|
| Food Processing | Preservative, Antioxidant | Used in wine, fruit juice, jams, and similar products to inhibit microbial growth and prevent enzymatic browning |
| Food Processing | Bleaching Agent | Applied during processing of dehydrated vegetables, candied fruits, and similar products for color retention and bleaching |
| Food Processing | Dough Conditioner | Used in biscuits, noodles, and other wheat-based products to improve dough quality |
| Aquaculture | Oxygenation Agent, Water Purifier | Releases oxygen to enhance dissolved oxygen levels in aquaculture water and regulate water quality |
| Pharmaceutical Industry | Active Pharmaceutical Ingredient (API) or Excipient | Used as a synthetic intermediate (e.g., in sulfonamide drug production) or as an excipient |
| Photographic Industry | Developing Solution Stabilizer | Acts as an antioxidant in film developing solutions to prevent oxidation of developing agents |
| Textile Dyeing and Printing | Deoxidizing Bleach Additive | Applied after fabric bleaching to remove residual hydrogen peroxide and prevent fiber damage |
| Pulp and Paper Industry | Lignin Removal Agent | Used during pulping or bleaching stages to facilitate lignin removal |
| Chemical Manufacturing | Reducing Agent | Employed as a reducing agent in various chemical synthesis reactions |
| Water Treatment | Corrosion and Scale Inhibitor | Used as a corrosion inhibitor in industrial recirculating cooling water systems |
Manufacturing Quality Control of POTASSIUM METABISULFITE
| Detection Item | Common Testing Method | Method Overview |
|---|---|---|
| Purity (K₂S₂O₅ Content) | Iodometric Titration (Redox Titration) | The potassium pyrosulfite releases SO₂ under acidic conditions, which reacts with a standard iodine solution in a redox reaction. Starch is used as an indicator, and the titration proceeds until the blue endpoint is reached. The content is calculated based on the iodine consumption. |
| Moisture Content | Karl Fischer Titration (Karl Fischer Method) | This method utilizes the specific reaction between Karl Fischer reagent and water in the sample. Water content is determined by either electrochemical or volumetric methods, suitable for precise measurement of trace moisture. |
| Residue on Ignition (Ash Content) | High-Temperature Incineration Method (GB/T 6435) | The sample is incinerated at high temperature (500–600°C) until constant weight. The ratio of residual mass to original sample mass represents the ash content, reflecting the level of inorganic impurities. |
| Lead (Pb) Content | Atomic Absorption Spectroscopy (AAS) or ICP-MS | After sample digestion, lead ion concentration is measured using AAS or Inductively Coupled Plasma Mass Spectrometry (ICP-MS), ensuring compliance with food/pharmaceutical heavy metal limits. |
| Arsenic (As) Content | Hydride Generation-Atomic Fluorescence Spectrometry (HG-AFS) | After sample digestion, arsenic is converted into arsine gas, which is detected via atomic fluorescence intensity. This method offers high sensitivity and is suitable for trace analysis. |
| Chloride (Cl⁻) Content | Silver Nitrate Titration (Mohr's or Volhard's Method) | In neutral or slightly alkaline conditions, chloride ions are titrated with standard silver nitrate solution, forming a silver chloride precipitate. Chromate potassium or ferric ammonium sulfate serves as an indicator to determine the endpoint. |
| Sulfate (SO₄²⁻) Content | Turbidimetry or Barium Salt Precipitation Method | The sample is acidified and treated with barium chloride solution to form a white barium sulfate precipitate. Sulfate content is calculated by measuring turbidity with a turbidimeter or by filtering and weighing the precipitate. |
| pH Value of Solution | pH Meter Method | A 1% aqueous solution is prepared and its pH is directly measured using a calibrated pH meter. Potassium pyrosulfite solutions typically exhibit weak acidity (pH 4.0–5.5). |
| Appearance and Particle Size | Visual Inspection + Sieving Method | Inspect the sample’s color (should be white or slightly yellow crystalline powder) and check for agglomeration. Particle size distribution is assessed using standard sieves (e.g., 80 mesh, 100 mesh). |
| Total Heavy Metals | Inductively Coupled Plasma Mass Spectrometry (ICP-MS) | After microwave digestion, multiple heavy metals (e.g., Cd, Hg, Cu, Zn) are simultaneously quantified using ICP-MS, meeting pharmacopoeial or food additive standards. |
| Released Sulfur Dioxide (SO₂) Content | Distillation-Titration Method (GB 5009.34) | SO₂ is released from the sample under acidic conditions upon heating and absorbed by hydrogen peroxide, converting it to sulfuric acid. The resulting solution is then titrated with standard sodium hydroxide solution to calculate the SO₂ equivalent. |
Technical Specifications of POTASSIUM METABISULFITE
| Test Item | Specification |
|---|---|
| Appearance | White crystal powder |
| K2S2O5 | ≥97.0% |
| SO2 | ≥56.0% |
| K2S2O3 | <0.1% |
| Na | ≦2.0% |
| Cl | ≤0.05% |
| Heavy metals | ≦10 ppm |
| As | ≦1 ppm |
| Cu | ≦1 ppm |
| Fe | ≦5 ppm |
| Hg | ≦0.1 ppm |
| Pb | ≦1 ppm |
| Se | ≦1 ppm |
| Zn | ≦1 ppm |
| pH(10% solution) | 3.8-4.8 |
Specifications vary by industry. Reach out to our technical experts for a COA tailored specifically to your application. Email:selse@GRchemical.com
|
|
Download COA of POTASSIUM METABISULFITE
| CAS/Product ID | *Required fields | |
| Lot/Batch Number | *Required fields | |
Packaging of POTASSIUM METABISULFITE
Industrial POTASSIUM METABISULFITE Procurement FAQ
1. How do you ensure product quality consistency?
We rely on a mature China-based manufacturing system and implement strict batch control and quality inspection for every shipment. Our production process complies with ISO 9001 standards, and a COA is provided for each batch to ensure consistent and reliable quality.
2. Do you offer competitive pricing for bulk orders?
Yes, as a China-based manufacturer and bulk supplier, we provide tiered pricing based on order volume. We support FOB and CIF quotations, as well as L/C payment terms for large transactions to meet international trade requirements.
3. Can you support large-volume or long-term supply?
We have stable production capacity and a well-established supply chain, enabling continuous bulk supply. We support ton-level and container-level orders, as well as long-term cooperation projects.
4. What is your typical lead time?
For in-stock products, shipment can be arranged within 1–3 days. For bulk packaging or customized orders, lead time depends on the specific quantity and production schedule.
5. What documents do you provide?
We can provide complete documentation upon request, including COA, SDS, TDS, and other compliance certificates, meeting industrial procurement and export requirements.
6. Can you customize product specifications or packaging?
Yes, we support customization of parameters such as purity, impurities, residual solvents, and heavy metals. We also offer various bulk packaging options, including 25kg bags, drums, and IBC tanks, suitable for industrial applications and transportation.
7. What shipping options do you support?
We support both FCL (Full Container Load) and LCL (Less than Container Load) shipments, and can flexibly arrange logistics solutions based on order size to meet bulk chemical export needs.
8. Do you provide technical or application support?
Yes, we provide basic application guidance and technical support based on industry experience to help customers optimize product usage.
9. How do you handle compliance and export regulations?
We are familiar with international trade and export regulations, ensuring all products comply with relevant requirements. We also provide complete documentation to support smooth customs clearance and global delivery.
Use Bulk
Supply Factory
Direct ISO 9001
Certified Samples
Available Stable
Supply