General Description
White to light-brown solid or brownish-yellow aqueous solution. Solid sinks and mixes with water.
Reactivity Profile
Pure BUTYNEDIOL(110-65-6) is non-explosvie. Small amounts of certain impurities-alkali hydroxides, alkaline earth hydroxides, halides-may cause explosive decomposition upon distillation. BUTYNEDIOL(110-65-6) 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].
Air & Water Reactions
Water soluble.
Hazard
Toxic by ingestion. May explode on con-
tamination with mercury salts, strong acids, and
alkaline earth hydroxides and halides at high tem-
peratures.
Health Hazard
May cause dermatitis.
Chemical Properties
yellow solid
Uses
2-Butyne-1,4-diol(110-65-6) is used to produce butanedioland butenediol, in metal plating andpickling baths, and in making the carbamateherbicide Barban (Carbyne).
Uses
Basic brightener in nickel electroplating baths,also an important intermediate for organic synthesis
Application
Intermediate; corrosion inhibitor; electroplating brightener; defoliant ; polymerization accelerator;
stabilizer for chlorinated hydrocarbons; cosolvent for paint and varnish
removal.
Definition
ChEBI: 2-Butyne-1,4-diol(110-65-6) 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).
Fire Hazard
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.
Flammability and Explosibility
Nonflammable
Synthesis
2-butyne-1,4-diol is carried out by reaction under pressure of acetylene and an aqueous solution of formaldehyde, catalyzed by copper acetylide.
storage
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.
Purification Methods
Crystallise the diol from EtOAc. [Beilstein 1 IV 2687.]
