Resulting from the anaerobic decomposition of organic matter, hydrogen sulfide is present in many water supplies.
_x000D_ Sewage and industrial wastes are other sources of sulfide pollution. Highly toxic, this compound has a characteristic rotten egg odor, which can be detected long before harmful concentrations are reached.

• Sulfide reacts with colorimetric reagents to form a blue color, which is measured with a color disc
• Color disc/Methylene blue
• 0-0.55, 0-2.25, 0-11.25 mg/L range
• 8.8x6.5x5.8 inch Blue Polypropylene Carrying Case