Ferrous Ammonium Sulfate, 0.1N (0.1M)

Features:

• Robust Stoichiometric Results: The $0.25\text{N}$ concentration allows for the analysis of samples with higher oxidant concentrations without the need for excessive burette refills.Stable Reduction Potential: Meticulously stabilized in a dilute sulfuric acid matrix to prevent the hydrolysis and oxidation of $Fe^{2+}$ ions.
• Method Accuracy: Ideal for environmental laboratories following standard methods for high-range COD testing, providing sharp, unambiguous endpoints when used with Ferroin indicator.
• Increased Lab Safety: Eliminates the inhalation risk of crystalline dust and the exothermic heat generated when mixing concentrated solutions from scratch.

Safety & Regulatory Information:

WARNING! Irritant: This solution may cause irritation to the skin, eyes, and respiratory tract. Contact with the eyes may cause redness and discomfort.

• Personal Protection: Wear nitrile gloves, safety splash goggles, and a protective lab coat. Use in a well-ventilated area.
• Storage: Store in a cool, dry area (15°C to 30°C). Keep the container tightly sealed. This solution should be protected from light and excessive air exposure to maintain its 0.25N titer.
• Quality Tip: In high-precision environments, it is best practice to re-standardize the solution against Potassium Dichromate on the day of use to account for any trace oxidation that may have occurred during storage.