ヘキサフルオロシリカート·2ナトリウム 化学特性,用途語,生産方法
外観
白色～ほとんど白色, 結晶性粉末～粉末
溶解性
水に難溶 (0.67g/100ml, 20℃)。水にやや溶けにくく、エタノールにほとんど溶けない。
用途
ガラス、釉薬原料、飲料水のふっ素化剤、防腐剤、殺虫剤。
化学的特性
white powder
使用
In enamels for china and porcelain; manufacture of opal glass; as insecticide, rodenticide; mothproofing of woolens. Fluoridating agent for drinking water. Intermediate in production of synthetic cryolite.
一般的な説明
Fine, white, odorless, powdered solid. Toxic by ingestion, inhalation and skin absorption. Used as a rodenticide.
空気と水の反応
Water soluble.
反応プロフィール
Sodium fluorosilicate has weak oxidizing or reducing powers. Redox reactions can however still occur. The majority of compounds in this class are slightly soluble or insoluble in water. If soluble in water, then the solutions are usually neither strongly acidic nor strongly basic. These compounds are not water-reactive.
危険性
Toxic by ingestion and inhalation, strong
irritant to tissue.
健康ハザード
Inhalation of dust may irritate nose and throat. Ingestion causes symptoms similar to fluoride poisoning; compound is highly toxic; initial symptoms include nausea, cramps, vomiting, diarrhea, and dehydration; in severe cases, convulsions, shock, and cyanosis are followed by death in 2-4 hr. Contact with eyes causes irritation. Contact with skin causes rash, redness, and burning, sometimes followed by ulcer formation.
火災危険
Behavior in Fire: Decomposes at red heat
工業用途
Sodium fluorosilicate (Na2SiF6) is a white, isomorphous powder. Solubility in water is similar to that of NaF. In
acid pH, solubility improves.
Commercially, Na2SiF6 is produced by treatment of fluorosilic acid with sodium chloride,
as shown in the following reaction:
H
2SiF
6 + 2NaCl = Na
2SiF
6 + 2HCl
安全性プロファイル
Poison by ingestion and
subcutaneous routes. A skin and severe eye
irritant. An insecticide. When heated to
decomposition it emits very toxic fumes of
Fand Na2O.
職業ばく露
Sodium hexafluorosilicate is as a rodenticide; as an intermediate in production of synthetic cyrolite; as an insecticide in delousing and in mothproofing of woolens.
輸送方法
UN2674/Sodium fluorosilicate, Hazard Class: 6.1; Labels: 6.1-Poisonous materials.
純化方法
Crystallise it from hot water (40mL/g) by cooling.
不和合性
Reacts with acids to produce hydrogen fluoride, a highly corrosive and poisonous gas.
ヘキサフルオロシリカート·2ナトリウム 上流と下流の製品情報
原材料
準備製品