エチレンチオ尿素 化学特性,用途語,生産方法
外観
白色の結晶性粉末
溶解性
水に微溶 (＞1%)。エタノール, DMFに可溶。水にやや溶けにくく、エタノールに極めて溶けにくく、アセトンにほとんど溶けない。
用途
塩素含有ゴム、特にポリクロロプレン、クロロスルホン化ポリエチレン用加硫促進剤。
用途
有機合成原料。
用途
加硫剤
説明
Ethylenethiourea, a thiourea derivative, is a rubber
chemical. It has caused contact dermatitis mainly in
rubber workers.
化学的特性
Ethylene thiourea is a white to light green, needle-like crystalline solid with a faint amine odor. It is very soluble in hot water;slightly soluble in cold water, methanol, ethanol, ethylene glycol, pyridine, acetic acid, and naphtha; and insoluble in acetone, ether, chloroform, and benzene.When heated to decomposition, ethylene thiourea emits toxic fumes of nitrogen oxides (NOx) and sulfur oxides (SOx).
Ethylene thiourea is available in the United States as crystals, as a powder, as an 80% dispersion of the powder in oil, or encapsulated in a matrix of compatible elastomers.
使用
elastomer accelerator;chlorinated polyethylene (CPE) rubber vulcanizing accelerator agent.
Ethylene thiourea is used primarily as an accelerator for vulcanizing polychloroprene (Neoprene®) and polyacrylate rubbers. Neoprene rubbers are used almost exclusively in industrial applications，e.g.. for mechanical and automotive products, in wire and cable production, in construction，and in adhesives. Polyacrylate rubbers are used in products such as seals, o-rings, and gaskets for automotive and aircraft applications. Ethylene thiourea is used in the manufacture of ethylene-bisdithiocarbamate pesticides, such as Maneb®, Mancozeb®, Metiram®,and Zineb®.Ethylene thiourea is also used in electroplating baths, as an intermediate in antioxidant production, in dyes， pharmaceuticals，and synthetic resins. However, there is no evidence that the compound is used commercially for any of these purposes (IARC V.7, 1974; Sax, 1987).
一般的な説明
White to pale green crystals or an off-white solid. Odorless when pure, but technical product may have an amine odor.
空気と水の反応
Slightly soluble in water.
反応プロフィール
Ethlenethiourea may be sensitive to prolonged exposure to light. 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. May react with acids to liberate hydrogen sulfide.
危険性
Questionable carcinogen.
健康ハザード
Ethylene thiourea (ETU) is an
antithyroid substance and animal carcinogen.
火災危険
Ethylene thiourea is combustible.
接触アレルゲン
Ethylene thiourea, a thiourea derivative, is a rubber chemical. It caused contact dermatitis mainly in rubber workers.
職業ばく露
Ethylene thiourea is used extensively
as an accelerator in the curing of polychloroprene
(Neoprene) and other elastomers; as a vulcanizing accelerator in rubber processing; in electroplating baths. In addition, exposure to ethylene thiourea also results from the
very widely used ethylene bisdithiocarbamate fungicides.
Ethylene thiourea may be present as a contaminant in the
ethylene bisdithiocarbamate fungicides and can also be
formed when food containing the fungicides is cooked
発がん性
Ethylene thiourea is reasonably anticipated to be a human carcinogen based on sufficient evidence of carcinogenicity from studies in experimental animals.
輸送方法
UN2811 Toxic solids, organic, n.o.s., Hazard
Class: 6.1; Labels: 6.1-Poisonous materials, Technical
Name Required
純化方法
Crystallise it from EtOH or amyl alcohol. [Beilstein 24 III/IV 22.]
不和合性
Incompatible with oxidizers (chlorates,
nitrates, peroxides, permanganates, perchlorates, chlorine,
bromine, fluorine, etc.); contact may cause fires or explosions. Keep away from alkaline materials, strong bases,
strong acids, oxoacids, epoxides, acid anhydrides, and
acrolein
廃棄物の処理
Incineration in a furnace
equipped with afterburner and scrubber.
エチレンチオ尿素 上流と下流の製品情報
原材料
準備製品