EDTA Solution N/10 (0.1N)

EDTA Solution N/10 (0.1N) is a standardized solution of disodium ethylenediaminetetraacetate designed for laboratory use, especially for volumetric complexometric titrations involving metal ions.​

Properties

Concentration: 0.1N (N/10), equivalent to 0.025M; molecular formula: C₁₀H₁₄N₂Na₂O₈·2H₂O.​

Appearance: Clear, colorless, odorless liquid; miscible with water.​

pH (5% solution): Typically 4–5.​

Laboratory Use

Used as a titrant in complexometric analysis (especially water hardness, calcium, and magnesium quantification).​

Paired with indicators like Eriochrome Black T or solochrome black for endpoint detection.​

Accurate preparation and standardization are critical for reliable analytical results.​

Safety and Storage

Non-reactive, stable in normal laboratory conditions; not classified as hazardous or carcinogenic.​

Store tightly closed, away from direct sunlight and air to avoid concentration loss through evaporation.​

EDTA N/10 (0.1N) is a vital reagent in analytical and environmental laboratories for precise quantification of divalent and trivalent metal ions.