Sodium Gluconate (Industrial Grade, ≥98%) is the sodium salt of gluconic acid, widely used as a concrete retarder, water reducer, PCE compounding ingredient, and steel surface chelator. Definly Chemicals supplies industrial-grade sodium gluconate directly from our Shandong factory to PCE compounders, ready-mix concrete producers, and metal-cleaning service companies across India, Southeast Asia, the Middle East, and Europe.
Thank you for reading this post, don't forget to subscribe!Unlike food- or pharmaceutical-grade sodium gluconate, our industrial grade is produced specifically for high-performance construction and metal-treatment applications, with controlled iron content and tight Total Reducing Substance (TRS) limits for clean PCE compounding.
Quick Facts
| Chemical Name | Sodium Gluconate |
| CAS Number | 527-07-1 |
| EINECS | 208-407-7 |
| Molecular Formula | C₆H₁₁NaO₇ |
| Grade | Industrial / Concrete Admixture |
| Appearance | White to off-white crystalline powder |
| Purity | ≥98.0% |
| Packaging | 25 kg PP-laminated bags or 1000 kg jumbo bags |
| MOQ | 1 MT sample / 20 MT bulk FCL |
| Lead Time | 10–15 days |
| Origin | Shandong, China |
Technical Specifications
| Parameter | Specification | Test Method |
|---|---|---|
| Assay (Sodium Gluconate) | ≥98.0% | HPLC |
| Reducing Substances | ≤0.7% | Titration |
| Heavy Metals (as Pb) | ≤10 ppm | AAS |
| Iron (Fe) | ≤10 ppm | AAS |
| Sulfate | ≤0.05% | Titration |
| Loss on Drying | ≤0.5% | 105°C, 2h |
| pH (10% solution) | 6.5–7.5 | pH meter |
Applications
Industrial-grade sodium gluconate is one of the most cost-effective multi-functional admixtures used across heavy industry. Typical applications include:
- Concrete retarder & water reducer — extends setting time, improves workability, and reduces the water/cement ratio in ready-mix concrete, mass concrete, and self-consolidating concrete.
- PCE admixture compounding — serves as a synergistic component in finished superplasticizer formulations for slump retention.
- Steel and aluminum surface cleaning — chelates iron oxide and other metal oxides under alkaline conditions, replacing more aggressive acid-pickling routes.
- Glass bottle washing — sequesters Ca²⁺ and Mg²⁺ in alkaline cleaning baths used in beverage container reclaim systems.
- Textile and oilfield — sequestering agent in alkaline scouring of cotton; fluid-loss control additive in oilwell drilling muds.
Why Choose Definly Chemicals for Sodium Gluconate
- Direct manufacturer pricing — no middleman, FOB Qingdao prices typically 8–15% below European distributor offers.
- Concrete-grade focused — controlled iron and TRS for clean PCE compounding without dosing variability.
- Container-load logistics — 20 MT and 28 MT FCL options with full export documentation (CO, COA, MSDS, Form E/F).
- One-stop PCE supply chain — pair sodium gluconate with our PCE macromonomer, 2-HEA, and finished PCE admixture in a single shipment.
- Technical support — dosage and formulation guidance for compounders integrating gluconate into water-reducer blends.
Frequently Asked Questions
What is the difference between industrial-grade and food-grade sodium gluconate?
Industrial-grade sodium gluconate is produced for construction, metal cleaning, and similar non-edible applications. Specifications are optimized for chelation power, low iron content, and consistent water-reducing performance. It does not carry food safety certifications such as FSSC 22000, Halal, or Kosher; food and pharmaceutical applications require higher-purity grades.
What is the typical dosage in concrete admixtures?
As a stand-alone retarder and water reducer, sodium gluconate is typically dosed at 0.05% to 0.25% by weight of cement. As a component in finished PCE superplasticizer, it is commonly used at 1% to 5% of the finished admixture formulation. Validate dosage with mortar and concrete trial mixes for your specific cement and aggregate combination.
Can sodium gluconate replace gluconic acid?
For most concrete and metal-cleaning applications, yes. Sodium gluconate offers easier handling (it is a stable solid versus gluconic acid which is supplied as a 50% solution) and equivalent chelation performance. Gluconic acid is preferred only when the application requires acidic pH or where added sodium ions are undesirable.
Is your sodium gluconate REACH compliant for export to Europe?
Yes. Sodium gluconate (CAS 527-07-1) is on the EINECS list (208-407-7) and does not require REACH pre-registration. We provide a full Safety Data Sheet compliant with EU Regulation 1907/2006 and labeling under CLP Regulation 1272/2008.
What is your MOQ and lead time?
Minimum order is 1 MT for sample orders and 20 MT for bulk container shipments. Standard lead time is 10 to 15 days from payment confirmation for stock material. We offer FCL (20-foot and 40-foot) and LCL options worldwide.
What documents come with each shipment?
Each shipment is accompanied by Commercial Invoice, Packing List, Bill of Lading, Certificate of Origin (Form E for ASEAN, Form F for Pakistan, GSP Form A), Mill Test Certificate / Certificate of Analysis, MSDS, and Fumigation Certificate where required.
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Need Food or Feed-Grade Sodium Gluconate?
Definly Chemicals supplies industrial-grade sodium gluconate for concrete and construction use. For food-grade and feed-grade sodium gluconate, calcium gluconate, ferrous gluconate, and other mineral gluconates, our group manufacturer WIS Biotech produces these directly in Shandong, China under ISO 9001/14001/45001 with Halal and Kosher recognition. See the WIS Biotech gluconate range or our group structure for combined gluconate and PCE sourcing.