1,3-ジフェニル-2-チオ尿素 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, アセトン, エタノールに難溶。エーテル, 酢酸エチルに可溶。エタノール及び水に溶ける。
用途
加硫促進剤、硫化染料、クロロプレンゴム用加硫促進剤
用途
有機合成原料。
説明
Diphenylthiourea is a rubber chemical used as an
accelerator and stabilizer in neopren.
化学的特性
white powder
使用
Vulcanizing accelerator; sulfur dyes.
一般的な説明
White to off-white powder.
空気と水の反応
Insoluble in water.
反応プロフィール
An organosulfide amide. Organosulfides are incompatible with acids, diazo and azo compounds, halocarbons, isocyanates, aldehydes, alkali metals, nitrides, hydrides, and other strong reducing agents. Reactions with these materials generate heat and in many cases hydrogen gas. Many of these compounds may liberate hydrogen sulfide upon decomposition or reaction with an acid. Organic amides/imides react with azo and diazo compounds to generate toxic gases. Flammable gases are formed by the reaction of organic amides/imides with strong reducing agents. Amides are very weak bases (weaker than water). Imides are less basic yet and in fact react with strong bases to form salts. That is, they can react as acids. Mixing amides with dehydrating agents such as P2O5 or SOCl2 generates the corresponding nitrile. The combustion of these compounds generates mixed oxides of nitrogen (NOx).
健康ハザード
ACUTE/CHRONIC HAZARDS: When heated to decomposition 1,3-Diphenyl-2-thiourea emits highly toxic fumes.
火災危険
Flash point data for 1,3-Diphenyl-2-thiourea are not available. 1,3-Diphenyl-2-thiourea is probably combustible.
工業用途
Thiocarbanilide (diphenyl thiourea) is a crystalline compound, only marginally soluble
in water. In solution, it can assume a tautomeric form, typical of thiocarbanilide.
The first tautomer has acidic characteristics. The hydrogen can easily react with cations from
the mineral surface and therefore can act as a collector. The second form (II) does not have
collecting properties. Thiocarbanilide is a very effective and selective collector for galena.
Diphenylthiocarbazide (C
6H
5–NH–NH)
2–C=S. This collector also appears in two forms;
in the active form the hydrogen is connected to sulfur. This reagent can be both anionic
and cationic. This collector can be utilized for flotation of nickel and cobalt minerals after
treatment of the pulp with copper sulfate.
接触アレルゲン
It is a rubber chemical used as an accelerator and stabilizing
agent in neoprene
安全性プロファイル
Moderately toxic by
ingestion and intraperitoneal routes.
Experimental reproductive effects. When
heated to decomposition it emits highly
toxic fumes of SOx, and NOx,.
純化方法
Crystallise the thiourea from boiling EtOH by adding hot water and allowing to cool. [Beilstein 12 H 394, 12 IV 810.]
1,3-ジフェニル-2-チオ尿素 上流と下流の製品情報
原材料
準備製品