Product Overview

Sulfo Orange is a specialized azo dye used as a metal ion indicator, particularly effective in detecting barium (Ba²⁺) and strontium (Sr²⁺) in complexometric and precipitation-based analyses. When bound to specific alkaline earth metals, Sulfo Orange forms intensely colored complexes—typically transitioning from orange to red or purple depending on the metal and pH environment.

Its strong visual contrast and reactivity make it useful in water hardness determination, ion-selective analyses, and inorganic chemistry teaching labs where reliable identification of divalent cations is required.

Key Features:

• Highly sensitive to barium, strontium, and similar metal ions
• Produces vivid color changes upon complex formation
• Stable in solid form and easily prepared as an aqueous or alcoholic solution
• Effective in moderately acidic to neutral pH ranges
• Compatible with visual and photometric detection methods

Applications:

• Detection of Ba²⁺ and Sr²⁺ in environmental and industrial samples
• Ion analysis in inorganic and coordination chemistry
• Teaching labs demonstrating selective metal-binding indicators
• Qualitative spot testing or semi-quantitative colorimetric analysis
• Support reagent in gravimetric or titrimetric workflows

Sulfo Orange is a valuable reagent for detecting specific divalent cations, offering clear visual confirmation and dependable performance in a range of analytical chemistry contexts.