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Barium chloride dihydrate and barium chloride are two common compounds with important application value in fields such as chemistry and medicine. Although they have only one word difference in name, there are significant differences in physical properties, chemical properties, uses, and safety

Barium chloride dihydrate (BaCl2 · 2H2O) is a dihydrate, also known as barium chloride hydrate. It is a colorless crystal that is soluble in water. Barium chloride dihydrate has hygroscopicity and is prone to absorbing moisture in the air, forming hexahydrates. It is often used as a reagent in chemical laboratories to detect the presence of sodium sulfate and determine the content of water. In addition, barium chloride dihydrate is widely used in industrial fields such as pharmaceutical manufacturing, textile industry, and leather manufacturing. However, barium chloride dihydrate is a toxic substance, and excessive ingestion or inhalation can cause serious harm to human health. Therefore, safety precautions should be taken during use

In contrast, barium chloride (BaCl2) is an anhydrous, colorless crystalline substance that is not easily soluble in water. Barium chloride has good hygroscopicity and solubility, and is soluble in organic solvents such as methanol and ethanol. Barium chloride is commonly used in industrial production for the preparation of barium salts, the production of metallic barium, and metal surface treatment. In addition, barium chloride can also be used as a precipitant, such as in barium salt water treatment systems, to remove sulfate ions from water. Unlike barium chloride dihydrate, barium chloride is non-toxic, but attention should still be paid to the safe operation of its dissolution solution and dust

Overall, there are significant differences between barium chloride dihydrate and barium chloride in terms of physical and chemical properties, application fields, and safety. Barium chloride dihydrate is commonly used in chemical laboratories, pharmaceutical manufacturing, and industrial fields, but it has certain toxicity. Barium chloride is widely used in industrial production, with good solubility and moisture absorption, but it is non-toxic in itself. Therefore, when using these two compounds, it is necessary to choose appropriate materials according to the actual situation and strictly follow safety operating procedures to ensure personal safety and the smooth progress of experiments or production.