Analysis of organic reagent is determined for inorganic elements in the separation and analysis of precipitant for enrichment, extraction agent, chelating agent and indicator for organic compounds, and not to refer to the general solvent, organic acid and organic alkali. These organic reagents must have good sensitivity and selectivity. With the development of analytical chemistry and the chemical industry, will be developed this kind of reagent sensitivity and better selectivity, such as since 1967 for some metal (such as alkali metal, alkaline earth metal) crown ether compounds and ammonium ion complexing is such.
MSDS, international known as chemical safety information card, is the physical and chemical properties of the chemical manufacturers and distributors must provide according to the legal requirements of the chemicals (such as pH, flash, flammable, toxic, reactive etc.), environmental hazards, and health of users (such as carcinogenic, teratogenic) may produce a comprehensive document. It includes the harm of hazardous chemicals Flammable, explosive properties, toxicity and environmental hazards, and safety, emergency handling, the main physical and chemical parameters, the comprehensive laws and regulations on the information.
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