Sodium Gluconate

Construction Grade · Industrial Grade — Bulk supply across India & International Markets

What is Sodium Gluconate?

Sodium Gluconate is a versatile organic salt valued in the construction industry primarily as a concrete set retarder, helping extend the workable time of concrete in applications requiring delayed setting, such as hot-weather concreting or long-distance ready-mix delivery. It is a white to off-white crystalline powder that also functions as an effective chelating agent, capable of binding calcium, iron, and other metal ions, giving it valuable secondary roles in water treatment, metal cleaning, and various industrial applications beyond construction.

Polychem Industries supplies Sodium Gluconate in construction grade and industrial grade to ready-mix concrete companies, concrete admixture manufacturers, water treatment companies, and metal cleaning product formulators across India and internationally. Its dual function as both an effective concrete retarder and a strong, biodegradable chelating agent makes it a valuable specialty chemical across the construction and broader industrial chemicals sectors.

Available Grades

GradeFormPurityStandardApplications
Construction GradeWhite to off-white crystalline powder/granules98%+ (Construction / Industrial Grade)Construction / Concrete AdmixtureConcrete set retarder, water reducer, chelating agent
Industrial GradeWhite crystalline powder98%+IndustrialMetal cleaning, water treatment, textile processing

Applications & Uses

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Concrete Set Retarder

The primary construction application. Sodium Gluconate delays the setting time of concrete, valuable in hot-weather concreting where high temperatures can cause concrete to set too quickly, and in applications requiring extended workability such as long-distance ready-mix transport or large structural pours.

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Hot-Weather Concreting

Widely used to counteract the accelerated setting that occurs in concrete during hot weather conditions, helping maintain adequate working time for proper placement, consolidation, and finishing of the concrete.

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Mass Concrete & Large Pours

Used in mass concrete applications such as large foundations and dam construction, where extended setting time helps manage the heat of hydration and supports continuous, uninterrupted concrete placement across large pour volumes.

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Water Treatment & Scale Control

Used as a chelating agent in water treatment applications, helping sequester calcium, iron, and other metal ions that could otherwise cause scale formation or interfere with water treatment chemistry.

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Metal Cleaning & Surface Treatment

Used in metal cleaning and surface treatment formulations as a chelating agent, helping remove metal oxide deposits and improve the effectiveness of cleaning and pre-treatment processes.

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Textile Processing

Used in certain textile dyeing and finishing processes as a chelating agent, helping control metal ion interference with dye uptake and processing chemistry.

Technical Specifications

Sodium Gluconate — Key Properties

Chemical FormulaC6H11NaO7
CAS Number527-07-1
Molecular Weight218.14 g/mol
AppearanceWhite to off-white crystalline powder/granules
Purity98%+ (Construction / Industrial Grade)
Melting PointDecomposes above 200°C
Density / Bulk DensityBulk density: 0.7–0.9 g/cm3
pH6.0 – 8.0 (10% solution)
Packaging Available25 kg bags
StorageStore in cool, dry place away from moisture. Non-hygroscopic and chemically stable under normal storage conditions.

Why Source Sodium Gluconate from Polychem Industries?

  • Construction Grade and Industrial Grade available
  • Effective concrete set retarder for hot-weather concreting
  • Strong, biodegradable chelating agent for secondary industrial uses
  • Certificate of Analysis available on request
  • Reliable bulk supply for ready-mix and admixture manufacturers
  • Export documentation experience for international shipments

Frequently Asked Questions

Why is Sodium Gluconate used to retard concrete setting in hot weather?
High temperatures accelerate the chemical hydration reactions in cement, causing concrete to set and stiffen more quickly than desired, which can compromise proper placement, consolidation, and finishing, particularly for large pours or when transport time is significant. Sodium Gluconate interferes with this hydration process in a controlled way, extending the workable time of the concrete to allow adequate time for proper construction procedures even in challenging hot-weather conditions.
Can Sodium Gluconate be used in combination with superplasticizers?
Yes — Sodium Gluconate is often used in combination with superplasticizers such as SMF, SNF, or polycarboxylate ether products in complete concrete admixture systems, where the retarder controls setting time while the superplasticizer manages water reduction and workability. Compatibility testing through trial mixes is recommended when combining multiple admixture types in a specific concrete formulation.
Is Sodium Gluconate biodegradable?
Yes — Sodium Gluconate is generally considered readily biodegradable, making it an environmentally favourable chelating agent choice compared to some alternative chelators with more limited biodegradability, an increasingly important consideration in water treatment and industrial cleaning applications.
Do you export Sodium Gluconate outside India?
Yes. We export to Bangladesh, Sri Lanka, Nepal, Bhutan, and South Africa with full export documentation. Contact us for export pricing and lead times.

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