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外観
白色～褐色, 結晶～結晶性粉末又はフレーク
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溶解性
エタノール、アセトン及び水に溶ける。水、エタノール、エステルに易溶。エーテル、クロロホルムに難溶。石油ベンジンに不溶。
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用途
合成樹脂、メッキ光沢剤
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用途
有機合成原料。広く合成繊維、ゴム、可塑剤、医薬などの合成原料、メッキ助剤などに用いられる。
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用途
合成中間体(腐食防止剤、メッキ薬、農薬、重合促進剤)
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特長
潮解性を示す。アルカリと加熱するとアセチレンとホルムアルデヒドに分解する。臭素1分子を付加する。
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化学的特性
yellow solid. Soluble in water, acidic solution, ethanol and acetone, slightly soluble in chloroform, insoluble in benzene and ether.
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主な応用
Basic brightener in nickel electroplating baths, also an important intermediate for organic synthesis; corrosion inhibitor; defoliant ; polymerization accelerator; stabilizer for chlorinated hydrocarbons; cosolvent for paint and varnish removal.
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定義
ChEBI: 2-Butyne-1,4-diol is a butynediol that is but-2-yne substituted by hydroxy groups at positions 1 and 4. It is used to produce butanedioland butenediol, in metal plating andpickling baths, and in making the carbamateherbicide Barban (Carbyne).
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一般的な説明
1,4-butynediol appears as white to light-brown solid or brownish-yellow aqueous solution. Solid sinks and mixes with water. (USCG, 1999)
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空気と水の反応
Water soluble.
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反応プロフィール
Pure 2-Butyne-1,4-diol is non-explosvie. Small amounts of certain impurities-alkali hydroxides, alkaline earth hydroxides, halides-may cause explosive decomposition upon distillation. 2-Butyne-1,4-diol should not be treated with basic catalysts in the absence of a solvent at room temperature, and its stability is less with elevated temperatures. In strong acids, contamination with mercury salts can also result in violent decomposition [NFPA 491M 1991].
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危険性
Toxic by ingestion. May explode on contamination with mercury salts, strong acids, and alkaline earth hydroxides and halides at high temperatures. May cause dermatitis.
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健康ハザード
2-Butyne-1,4-diol exhibits moderate to hightoxicity in test animals. It is about 10 timesmore toxic than are the saturated C4 diols.The oral LD50 value in rats is 0.125 mL/kg.It causes irritation to the skin.
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火災危険
Noncombustible solid, flash point (open cup)
152°C (305.6°F). It is stable at room temperature.
But the dry compound explodes in the
presence of certain heavy metal salts, such
as mercuric chloride. Heating with alkaline
solution may result in an explosion.
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安全性プロファイル
A poison by ingestion.
A skin sensitizer upon long or repeated
contact. Moderately explosive. When heated
to decomposition it emits acrid smoke and
fumes and may explode. Explosive reaction
with traces of alkaltes, alkali earth
hydroxides, halide salts, strong acids,
mercury salts + strong acids. See also
ACETYLENE COMTOUNDS.
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貯蔵
2-Butyne-1,4-diol can be stored in steel,aluminum, nickel, glass, epoxy, and phenolicliner containers. Rubber hose may be usedfor transfer. Avoid contact with heavy metalsalt contaminants.
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純化方法
Crystallise the diol from EtOAc. [Beilstein 1 IV 2687.]
