Sigma-Aldrich Sodium hydroxide, pellets for analysis EMSURE®

Sigma-Aldrich EMSURE® Sodium Hydroxide in pellet form is a high-purity analytical reagent designed for precision chemical analysis, synthesis, and titration applications. With an assay of ≥99% and low trace metal and anion contamination, this sodium hydroxide is suitable for use in USP, EP, ACS, and SM 4500-NH3 compliant protocols.

Key Features

• Analytical Reagent Grade (EMSURE®) – Meets high-purity standards for quality control and analytical workflows
• ≥99% Assay (acidimetric) – Reliable for titrations and quantitative analysis
• Low Impurities – Strict control of trace cations, anions, and heavy metals
• Highly Soluble – Solubility of 1090 g/L in water
• Versatile Lab Use – Suitable for synthesis, neutralization, pH adjustment, and reagent preparation

Specifications

Impurity Profile (Maximum Levels)

Anion Traces:

• Carbonate (Na₂CO₃): ≤1.0%
• Chloride (Cl⁻): ≤0.012%
• Phosphate (PO₄³⁻): ≤0.0005%
• Sulfate (SO₄²⁻): ≤0.010%
• Silicate (SiO₂): ≤0.001%

Cation & Heavy Metal Traces:

• Aluminium (Al): ≤0.0005%
• Arsenic (As): ≤0.0001%
• Calcium (Ca): ≤0.0005%
• Copper (Cu): ≤0.0002%
• Iron (Fe): ≤0.0005%
• Lead (Pb): ≤0.0005%
• Magnesium (Mg): ≤0.0005%
• Nickel (Ni): ≤0.00025%
• Potassium (K): ≤0.05%
• Zinc (Zn): ≤0.001%
• Total Nitrogen (N): ≤0.0003%

Applications

• Analytical Chemistry – Titrations and standardizations
• Chemical Synthesis – Base-catalyzed reactions and saponification
• Water Testing – SM 4500-NH3 compliant workflows
• Nanomaterial Synthesis – Used in the preparation of ZIFs, NiO, ZnCr₂O₄
• Sample Digestion and Neutralization – pH adjustment in prep protocols

Ordering Information

Sigma-Aldrich Sodium Hydroxide EMSURE® Pellets deliver ultra-pure performance for analytical, industrial, and academic laboratory needs. With precise impurity control and robust solubility, this reagent supports demanding chemical applications and ensures reproducibility in high-stakes experiments.