酢酸銀(I) 化学特性,用途語,生産方法
外観
白色〜わずかにうすい褐色, 結晶〜粉末
溶解性
水に溶ける。
用途
アクリル繊維染色改良剤，農薬原料。
用途
ファインセラミックスの製造原科。
用途
酢酸銀(I)（さくさんぎん いち、英: silver(I) acetate）は、主に農薬として使われる感光性の物質である。タバコの煙と反応して不快臭が生まれるので、禁煙補助のチューインガムに使われている。
使用上の注意
純度は金属ベースで差数法によって算出したもので、重量又は容量分析等の化学的方法によるものではありません。使用目的により、正確な含量が必要な場合は、それらの方法によって測定する必要があります。
説明
Silver acetate is an organic compound with the empirical formula CH
3COOAg (or AgC
2H
3O
2). It is a photosensitive, white crystalline solid. It is a useful reagent in the laboratory as a water soluble source of silver lacking an oxidizing anion. It has been used in some antismoking drugs.
化学的特性
Off-White/Brown Crystalline Powder
使用
In the health field, silver acetate-containing products have been used in gum, spray, and lozenges to deter smokers from smoking. The silver in these products, when mixed with smoke, creates an unpleasant metallic taste in the smoker's mouth, thus deterring them from smoking. Lozenges containing 2.5 mg of silver acetate showed "modest efficacy" on 500 adult smokers tested over a three-month period. However, over a period of 12 months, prevention failed. In 1974, silver acetate was first introduced in Europe as an over-thecounter smoking-deterrent lozenge (Repaton) and then three years later as a chewing gum (Tabmint).
反応性
3 – 1 - Carbonylation Silver acetate, when combined with carbon monoxide (CO), can induce the carbonylation of primary and secondary amines. Other silver salts can be used but the acetate gives the best yield.
2 R
2NH + 2 AgOAc + CO → [R
2N]
2CO + 2 HOAc + 2 Ag
3 – 2 - Hydrogenation Silver acetate in a solution of pyridine absorbs hydrogen and is reduced to metallic silver.
3 – 3 - Direct ortho - arylation Silver acetate is a useful reagent for direct ortho-arylation (to install two adjacent substituents on an aromatic ring) for of benzylamines and N-methylbenzylamines. The reaction is palladiumcatalized and requires a slight excess of silver acetate.This reaction is shorter than previous ortho-arylation methods.
世界保健機関（WHO）
Silver acetate has been used as a disinfectant and as an antismoking
aid. It was refused registration in Cyprus on the grounds that prolonged use of silver salts can cause permanent argyria and that no well-controlled trials
have been performed to establish the safety and efficacy of the preparation. It
remains registered as an aid to stopping smoking in Canada and the United States.
一般的な説明
White crystalline plates. Light sensitive. Density 3.26 g / cm3.
空気と水の反応
Slightly soluble in water.
反応プロフィール
Silver acetate is freely soluble in dilute nitric acid [Merck]. Can serve as an oxidizing agent.
危険性
Toxic material.
健康ハザード
Inhalation of dust irritates nose and throat. Contact with eyes or skin causes irritation. If continued for a long period, ingestion or inhalation of silver compounds can cause permanent discoloration of skin (argyria).
安全性
The LD
50 of silver acetate in mice is 36.7 mg/kg. Low doses of silver acetate in mice produced hyper-excitability, ataxia, central nervous system depression, labored breathing, and even death. The U.S. FDA recommends that silver acetate intake be limited to 756 mg over a short period of time; excessive intake may cause argyria.
純化方法
Shake it with acetic acid for three days, and the process is repeated with fresh acid. The solid is then dried in a vacuum oven at 40o for 48hours. It has also been recrystallised from water containing a trace of acetic acid, and dried in air. Store it in the dark. [Beilstein 2 IV 112.]
酢酸銀(I) 上流と下流の製品情報
原材料
準備製品