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Formic acid (chemical formula HCOOH, molecular formula CH2O2, molecular weight 46.03), commonly known as formic acid, is the simplest carboxylic acid.A colorless liquid with a pungent odor.Weak electrolytes, melting temperature 8.6 ℃, the boiling point of 100.8 ℃.It is highly acidic and corrosive, which can irritate the skin and cause blistering.It is found in bee, some ant and caterpillar secretions.Is an organic chemical raw material, also used as a disinfectant and preservative.
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It is easy to form peroxides, which will explode during shaking. Therefore, the peroxides produced should be treated with sodium sulfite solution before use.P -Benzyl-AminophEnol or hydroquinone are often added as stabilizers.It is miscible with ethanol and ether and slightly soluble in water.Relative density (d204)0.7258.Refractive index (n23D)1.3678.Flash point (cup) - 9 ℃.Flammable.It's stimulating.
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Dioctyl fat is a chemical substance, colorless and transparent oily liquid, molecular formula is C24H38O4. Insoluble in water, soluble in ethanol, ether, mineral oil and most other organic solvents and hydrocarbons. Dioctyl phthalate can be used as a plasticizer in thermoplastic molding to improve its processability.
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It is the monohydroxy alcohol with the simplest structure. It is soluble in water and miscible in organic solvents such as alcohols, diethyl ether etc. As a kind of colorless and volatile liquid with alcohol smell, it can be obtained by the reaction between carbon monoxide and hydrogen.
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Colorless and transparent liquid with pungent smell. It consists of 45%~70% m-xylene, 15%~25% p-xylene and 10%~15% o-xylene. Miscible randomly with ethanol, chloroform or diethyl ether, insoluble in water. Low toxicity. It is prone to combustion and may burn or explode when encounters open flame or high temperature. It has a violent reaction with oxidant. If flow velocity is too fast, static electricity may appear. Its vapor is heavier than the air and can spread in lower position to quite far place, and catches on fire when encounters open flame.
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