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AuLeach™ GDA: Eco-Friendly Gold Leaching Agent | Non-Toxic Sodium Cyanide Substitutepicture1
AuLeach™ GDA: Eco-Friendly Gold Leaching Agent | Non-Toxic Sodium Cyanide Substitutepicture2

AuLeach™ GDA: Eco-Friendly Gold Leaching Agent | Non-Toxic Sodium Cyanide Substitute

AuLeach™ Series: The Revolutionary 1:1 Seamless Substitute for Sodium Cyanide, High-Recovery Green Mining Reagents: HS Code 3824999999
CASNot Applicable (Non-Cyanide System)
MFComplex Organic Compound
Technical specifications≥ 98%+ Components
  • Levels of danger：Non-hazardous (Common Chemicals)
  • UN NUMBER：Not Required
  • HS code：3824999999
  • MW：Mixture
  • Density：1.20–1.35 g/cm³
  • Appearance：White Powder
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United Chemical AuLeach™ 

GDA Gold Leaching Agent

High-Recovery Cyanide Substitute – The Global Standard for Non-Toxic Gold Leaching

Revolutionizing gold extraction with a 1:1 seamless replacement for Sodium Cyanide.

Engineered for Profit, Certified for Safety, and Built for a Green Mining Future.

HS Code
3824999999
CAS No.
Non-Cyanide System
Hazards
Common Chemical
Leaching Rate
92% - 95%

Expert Insight: Breaking the "Cyanide Constraint"

As global environmental regulations tighten, the "hidden costs" of Sodium Cyanide—including specialized transport, armed escorts, complex permitting, and high tailings treatment expenses—can severely erode your project's profitability.

"AuLeach™ is not just a reagent; it is an industrial-strength solution designed to reach the theoretical ceiling of gold extraction without the regulatory burden. It offers a 1:1 seamless substitute, allowing mines to bypass the 'Red Tape' of cyanide management while maintaining premium recovery rates."

Technical Data Sheet (AuLeach™ GDA Series)

AuLeach™ GDA Technical White Paper

Deep Component Analysis: From Molecular Synergy to Mine Profitability

I. Core Active Components: Multi-Dimensional Molecular Synergy System

AuLeach™ is not a singular chemical reagent, but a precisely calculated "Synergistic Complexation Matrix." Each component plays an indispensable role in the gold extraction process:

1Cyanuric Acid Trisodium Salt - 70%

Technical Interpretation: Acts as the primary Chelating Agent. Its molecular structure possesses strong electron-donor capabilities, forming ultra-stable ring-shaped chelates with gold atoms.

Mine Benefit: Provides up to 95% of the leaching driving force, ensuring gold is thoroughly dissolved. Its stability in complex water conditions far exceeds traditional eco-reagents.

2Sodium Sulfate - 20%

Technical Interpretation: Serves as an electrolyte accelerator. By increasing the ionic strength of the slurry, it effectively lowers the activation energy required for the reaction.

Mine Benefit: Significantly boosts leaching kinetics and shortens reaction cycles. Under identical production conditions, throughput can increase by 10% - 15%.

3Sodium Citrate - 7%

Technical Interpretation: A multi-functional auxiliary that acts as both a pH buffer and a Masking Agent for interfering metal ions.

Mine Benefit: Effectively passivates interfering ions (Copper, Zinc, Iron), preventing them from consuming the reagent. This reduces chemical loss and improves the purity of the pregnant solution.

4Iron Carbide - 3%

Technical Interpretation: A proprietary Electron Transfer Catalyst unique to the AuLeach™ formulation.

Mine Benefit: Accelerates the oxidation (electron loss) of gold. In refractory ores or sulfur-bearing ores, this catalytic effect efficiently breaks down the passivation layer that hinders extraction.

II. Operational Value of Key Technical Indicators (Why it Matters)

Toxicity Rating (LD50 > 2000 mg/kg): Eliminating "Compliance Anxiety"

Technical Interpretation: An LD50 value exceeding 2000mg/kg classifies AuLeach™ as "Practically Non-Toxic" by international standards.
               Professional Value: Mines can bypass the heavy administrative costs of Sodium Cyanide. No armed escorts, no specialized high-security bunkers, and no complex monthly reporting for toxic substances. This reduces logistics compliance costs by 30% - 50% and significantly boosts the mine's ESG rating.

Solubility & Stability (>10°C): Cross-Climate Operational Standard

Technical Interpretation: The gray-white micro-granular treatment increases the specific surface area for rapid dissolution.
               Professional Value: Solves the pain point of slow leaching in cold climates common with other eco-reagents. AuLeach™ maintains peak chemical activity as long as water temperature is above 10°C, providing a stable recovery curve for high-altitude or seasonal mining operations.

Versatile Applicability: The Solution for Complex Ores

Technical Interpretation: Full coverage for Oxide, Semi-oxide, Sulfide ores, and Cyanide Tailings.
               Professional Value: When treating high-sulfur or high-arsenic ores, AuLeach™ is more "selective" than Sodium Cyanide. It avoids violent side reactions with impurities, meaning higher selectivity leads to reagent consumption savings of over 10% in complex geological conditions.

"We don't sell reagent parameters; we deliver operational certainty in the face of environmental regulations."

AuLeach™ GDA has been field-tested in over 200 gold mines across 77 countries. It simplifies complex chemical reactions into user-friendly operations, transforming hazardous chemical environments into safe, green production facilities.

A. Seamless Process Integration

Designed for "Drop-in Replacement." You do not need to modify existing CIP, CIL, or Heap Leaching infrastructure. Maintain your standard pH (10.5–11.5) and alkalinity controls while simply switching the reagent.

B. Accelerated Kinetics

Field data from 77 countries shows AuLeach™ can shorten adsorption equilibrium time by 2–4 hours. This increases plant throughput and optimizes the efficiency of our AuCarb™ Activated Carbon.

C. 30%-50% Logistics Savings

Classified as a common chemical, AuLeach™ eliminates the need for armed escorts, hazardous storage bunkers, and complex environmental discharge permits. It is a "Common Cargo" for sea and rail.

Usage Method & Performance Optimization

Alkalinity Management

Adjust pH to 11 ± 1 using lime or caustic soda. Stable alkalinity ensures the complex organic compounds in AuLeach™ stay active and prevents passivation of the gold surface.

Dosage Reference

Typical dosage: 0.5 - 1.0 kg per Ton of ore. The high selectivity of AuLeach™ reduces interference from harmful substances like arsenic and sulfur, stabilizing the recovery curve.

Packaging & International Logistics

Unit Packaging: 25 KG/Bag

Material: PE Paper-Plastic Composite with internal moisture-proof film.

Security: Tamper-proof and heavy-duty for rugged transit.

Container TypeMax Net Weight
20' FCL26,000 KG (26 MT)
40' FCL28,000 KG (28 MT)

Why Partner with United Chemical?

Born in the heart of China’s gold industry, we provide more than just reagents. We deliver a technical synergy where AuLeach™ (Leaching), AuCyan™ (Booster), and AuCarb™ (Adsorption) work in molecular harmony to secure an extra 2%-5% recovery gain for your mine.

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