Hydrochloric Acid 31% Technical Grade

Product Overview

Hydrochloric Acid 31% Technical Grade is a clear, colorless liquid solution of hydrogen chloride in water, designed for rigorous industrial use. With a typical assay of 31.5% HCl by weight and a precise density around 1.175 g/mL at 20°C, this technical grade reagent provides reliable acidity for pH adjustment, metal processing, and analytical workflows. The product is formulated under controlled conditions to minimize impurities while delivering consistent performance across production batches, supported by a documented gravimetric residue after ignition and a controlled APHA color profile to ensure clarity and repeatability in critical processes. Its vapor pressure, viscosity, and density characteristics align with standard operating procedures for handling and dosing in large-volume systems, enabling predictable reaction kinetics and process control in aqueous media.

Designed for applications spanning water treatment, industrial cleaning, chemical synthesis, laboratory titrations, and food processing, Hydrochloric Acid 31% Technical Grade serves as a versatile reagent in both manufacturing and R&D environments. The solution is processed to limit metal contaminants and residual impurities, ensuring compatibility with sensitive metal substrates and analytical instrumentation. Operators can rely on the product’s stability under storage and transportation conditions, provided in the accompanying SDS and batch-specific COA, which document assay, impurity profiles, and trace metals to support compliance with internal quality systems and external standards.

Key Properties

• Assay Weight Percent (min–max): 30–32%
• Chemical Formula: HCl
• Molecular Weight: 36.46 g/mol
• Boiling Point: 110–120°C
• Specific Gravity (20°C): 1.15–1.20 (typical 1.175)
• Residue After Ignition (max): 0.02%
• Chloride (ppm, max): 500 (typical 50)
• Nitrate (ppm, max): 50 (typical 5)
• Ammonium (ppm, max): 5 (typical 0.5)
• Sulfate (ppm, max): 100 (typical 20)
• Arsenic (ppm, max): 0.01 (typical 0.001)
• Heavy Metals as Pb (ppm, max): 0.5 (typical 0.05)

Common Applications

• Application Category: pH Adjustment – Water Treatment — Used to adjust acidity in municipal and industrial water treatment to maintain process efficiency and control corrosion in distribution systems.
• Application Category: Metal Cleaning – Industrial Manufacturing — Effective rust and scale removal on ferrous and non-ferrous metal surfaces prior to plating, coating, or forming operations.
• Application Category: Chemical Synthesis – Chemical Manufacturing — Reagent in various acid-catalyzed and neutralization reactions within multi-step syntheses and production processes.
• Application Category: Laboratory Reagent – Research Laboratory — Standard reagent for Analytical Titrations, calibration standards, and buffer preparation in experimental workflows.
• Application Category: Food Processing – Food Industry — Used for pH control and sanitation-related processing steps where compliant acidity adjustments are required.

Safety Precautions

Handle and store the solution in a cool, dry, well-ventilated area using corrosion-resistant containers (HDPE or glass). Use appropriate PPE including chemical splash goggles, face shield if splashing is possible, chemical-resistant gloves, and acid-resistant protective clothing. Ensure containment and ventilation to prevent inhalation of vapors; store away from incompatible materials and reactive metals to minimize exothermic interactions.

In case of exposure, follow standard emergency procedures: for eyes or skin contact, rinse with copious water for several minutes and seek immediate medical attention; for inhalation, move to fresh air and monitor for respiratory distress; for ingestion, do not induce vomiting and seek medical guidance promptly. The product is designated as DANGER with corrosive hazards to skin and eyes, metal corrosion potential, and possible respiratory irritation; transport as UN 1789, Hydrochloric acid, Class 8, PG II.

Benefits

✔ Technical Grade Reliability – Consistent 31% HCl solution with controlled impurity profile for repeatable process control and analytical accuracy.
✔ Broad Industrial Compatibility – Suitable for pH adjustment, metal cleaning, synthesis, and laboratory applications with supportive QC data and trace metal monitoring.