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The IBEX Sciences N/10 Sodium Hydroxide Solution (NaOH) is a pre-standardized, ready-to-use volumetric reagent heavily relied upon in clinical, analytical, and industrial laboratories. [1, 2]
The “N/10” designation indicates a 0.1 Normal (0.1 N) concentration. Because sodium hydroxide is a strong base, this precisely calibrated solution is an indispensable baseline tool for quantitative chemical analyses. [1, 2, 3, 4, 5]
Chemical Principles & Specifications
- Molarity vs. Normality: Sodium hydroxide is a monoprotic base, meaning each molecule yields exactly one hydroxyl ion (OH⁻) when dissociated in water. Because it donates a single equivalent per mole, a 0.1 Normal (N/10) solution is exactly equal to a 0.1 Molar (0.1 M) solution. [1, 2, 3, 4]
- Gram Profile: The molecular weight of sodium hydroxide is approximately 40.00 g/mol. To yield an N/10 concentration, exactly 4.00 g of pure NaOH are dissolved per liter (1000 mL) of high-purity distilled or deionized water. [1, 2]
- Carbonate-Free Formulation: Prepared sodium hydroxide solutions naturally absorb carbon dioxide (CO₂) from the air, creating sodium carbonate, which alters the base’s active strength. Standard volumetric lines from IBEX Sciences are engineered to minimize dissolved gases, ensuring strict normality retention. [1, 2]
Core Laboratory Applications
- Volumetric Titrations (Acid-Base): Serving as the benchmark alkaline solution, it is universally used to determine the exact concentration of unknown acids (such as hydrochloric, acetic, or nitric acids) via quantitative colorimetric or potentiometric titrations.
- pH Adjustment & Buffer Preparation: Extensively used across biochemical workflows, microbiology media assembly, and cell-culture steps to incrementally raise fluid pH to highly exact targets without introducing foreign salt variables. [1, 2]
- Standardization Pairing: It acts as the direct basic counterpart to the IBEX Sciences N/10 Oxalic Acid Solution, and the two are commonly paired together to verify laboratory titration calibrations.
Critical Storage & Handling Precautions
- Caustic Hazard: Even at a diluted N/10 concentration, sodium hydroxide remains a strong, corrosive base. It can cause chemical burns to the skin or localized tissue irritation. Personal protective equipment (PPE)—including splash goggles, lab coats, and nitrile gloves—is mandatory.
- Corrosive to Glass: Alkaline solutions slowly attack silicate glass over extended storage periods, which can lead to white silica flaking and a drift in titration accuracy. For this reason, it is packaged and must be stored in high-density polyethylene (HDPE) or compatible plastic containers.
- Airtight Sealing: The bottle must be capped immediately after use to prevent ambient air exposure, which triggers carbonation degradation and degrades the volumetric precision of the fluid. [1, 2, 3, 4]
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