Sodium Hydroxide 25% ACS Grade

Product Overview

Sodium Hydroxide 25% ACS Grade is a high-purity aqueous solution of Sodium Hydroxide (NaOH), also commonly known as Caustic Soda or Lye. This ACS Reagent Grade formulation is manufactured to meet rigorous American Chemical Society specifications, ensuring low impurity levels required for sensitive analytical and industrial applications. Unlike technical grade alternatives, this solution provides a verified assay for consistent performance in titration, pH buffering, and chemical synthesis.

The solution appears as a clear, colorless liquid with a density of approximately 1.2 g/mL at 25°C. It serves as a strong base (pKa ~14.0) capable of effective neutralization and alkalinity control. Industrial users and laboratory professionals rely on this 25% concentration for its stability and ease of dosing in automated systems. Traceability and quality assurance documentation accompany this product to satisfy compliance requirements for manufacturing and research environments.

Key Properties

• Chemical Formula: NaOH
• Grade: ACS Reagent Grade
• Concentration: 25% w/w
• Appearance: Clear, colorless liquid
• CAS Number: 1310-73-2
• Density: ~1.2 g/mL @ 25°C
• Molecular Weight: 40.00 g/mol
• Solubility: Completely soluble in water
• Boiling Point: > 100°C

Common Applications

• Laboratory Analysis: Used as a primary standard or titrant in analytical chemistry for acid-base titrations due to its high purity profile.
• pH Control: Precise pH adjustment in water treatment and industrial effluent systems where contaminant introduction must be minimized.
• Chemical Synthesis: Serves as a reactant in the production of organic compounds, high-purity soaps, and detergents.
• Surface Preparation: Utilized in critical cleaning and degreasing operations for metal finishing and electronics manufacturing where residue-free surfaces are required.
• Ion Exchange Resin Regeneration: Effective for regenerating anion exchange resins in demineralization plants.

Safety Precautions

Sodium Hydroxide 25% is a corrosive basic solution (Class 8 Corrosive). It causes severe skin burns and eye damage upon contact. Personnel must wear appropriate Personal Protective Equipment (PPE), including chemical-resistant gloves, splash goggles, and face shields. Ensure work areas are well-ventilated.

Store in a cool, dry place in compatible containers (HDPE or mild steel) away from strong acids and reactive metals like aluminum, zinc, and tin. In the event of a spill, contain with inert absorbent material and neutralize carefully according to local regulations. Refer to the Safety Data Sheet (SDS) for detailed handling and emergency procedures.

Benefits

• ACS Purity: Minimizes interference in analytical results and catalytic reactions.
• Ready-to-Use: Pre-mixed 25% solution eliminates the heat and hazard of dissolving solid pellets.
• Versatile Packaging: Available in lab-scale quantities (Quarts/Gallons) up to industrial bulk (Drums/Totes).
• Quality Assurance: Manufactured under strict controls to ensure lot-to-lot consistency.

Related Products

• Ammonium Hydroxide 29% ACS Grade
• Ammonium Hydroxide 29% Technical Grade
• Sodium Hydroxide 25% (Standard Grade)
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