142-30-3

Basic information

• Product Name: 2,5-Dimethyl-3-hexyne-2,5-diol
• Synonyms: 2,5-DIHYDROXY-2,5-DIMETHYL-3-HEXYNE;2,5-DIMETHYL-2,5-HEXYNEDIOL;2,5-DIMETHYL-3-HEXYN-2,5-DIOL;2,5-DIMETHYL-3-HEXYNE-2,5-DIOL;1,1,4,4-TETRAMETHYLBUTYNEDIOL;DIMETHYL HEXYNEDIOL;2,5-dimethyl-3-hexyne-5-diol;acetylenepinacol
• CAS NO: 142-30-3
• Molecular Formula: C₈H₁₄O₂
• Molecular Weight: 142.2
• EINECS: 205-533-4
• Product Categories: Acetylenes;Acetylenic Alcohols & Their Derivatives;Nonionic;Polymer Additives;Surfactants;Halogenated Heterocycles ,Pyrazoles,Pyrazines
• Mol File: 142-30-3.mol
• Article Data: 10

Chemical Properties

• Melting Point: 90-94 °C(lit.)
• Boiling Point: 121-123 °C7 mm Hg(lit.)
• Flash Point: 102°C
• Appearance: White to light yellow/Crystalline Flakes or Powder
• Density: 0,949 g/cm3
• Vapor Pressure: 0.0611mmHg at 25°C
• Refractive Index: 1.4179 (estimate)
• Storage Temp.: Store below +30°C.
• Solubility: 240g/l
• PKA: 12.91±0.29(Predicted)
• Water Solubility: 240 g/L (20 ºC)
• BRN: 969835
• CAS DataBase Reference: 2,5-Dimethyl-3-hexyne-2,5-diol(CAS DataBase Reference)
• NIST Chemistry Reference: 2,5-Dimethyl-3-hexyne-2,5-diol(142-30-3)
• EPA Substance Registry System: 2,5-Dimethyl-3-hexyne-2,5-diol(142-30-3)

Safety Data

• Hazard Codes: Xn
• Statements: 42/43
• Safety Statements: 7-36-24/25
• WGK Germany: 3
• RTECS: MR0176000
• TSCA: Yes
• Hazardous Substances Data: 142-30-3(Hazardous Substances Data)

Usage

Chemical Properties

white to light yellow crystalline flakes or powder

InChI:InChI=1/C8H14O2/c1-7(2,9)5-6-8(3,4)10/h9-10H,1-4H3

Upstream product

• 115-19-5 2-methyl-but-3-yn-2-ol 
• 67-56-1 methanol 
• 201230-82-2 carbon monoxide 
• 60-29-7 diethyl ether 
• 67-64-1 acetone 
• 74-86-2 acetylene 
• 70947-32-9 2,5-dibromo-2,5-dimethyl-3-hexyne 
• 1719-19-3 2-Methyl-4-phenyl-3-butyn-2-ol 
• 12212-46-3 tetramethylbutatriene(hexacarbonyl)diirion 
• 75-20-7 calcium carbide 
• 63025-11-6 2-chloro-3-hydroxy-1-(α-hydroxy-isopropyl)-3-methyl-but-1-enylmercury (1+); chloride 
• 4301-15-9 ethynyldimagnesium dibromide 
• 78-83-1 2-methyl-propan-1-ol 

Downstream Products

• 34106-07-5 2,5-dimethyl-2,5-diacetoxy-3-hexyne 
• 10596-74-4 2,5-bis-benzoyloxy-2,5-dimethyl-hex-3-yne 
• 3725-05-1 2,5-dimethylhexa-1,5-dien-3-yne 
• 859444-31-8 2,2,5,5-Tetramethyl-3-phenoxy-2,5-dihydro-furan 
• 875227-73-9 4-(2,2,5,5-Tetramethyl-2,5-dihydro-[3]furyl)-phenol 
• 27296-48-6 4-(1,1,4-trimethyl-pent-4-en-2-ynyl)-phenol 
• 47038-16-4 1-benzyl-4,5-bis-(α-hydroxy-isopropyl)-1H-[1,2,3]triazole 
• 56412-11-4 3,6-Dimethylthienol<3,2-b>thiophen 
• 110-03-2 2,5-dimethyl-2,5-hexanediol 
• 3730-60-7 2,5-dimethylhexan-2-ol 
• 3491-36-9 2,5-dimethyl-2,5-dihydroperoxy-3-hexyne 
• 592-13-2 2,5-dimethylhexane 
• 23359-01-5 2,5-dimethyl-hex-3-ene-2,5-diol 
• 594-61-6 2-methyllactic acid 

Relevant articles and documents

Method for Preparing Crosslinker Compound

The present disclosure relates to a method for preparing a crosslinker compound in which a crosslinker compound capable of using for the production of a super absorbent polymer can be obtained in a higher yield by a simple manner. The crosslinker compound obtained by the above method can be used as a thermally decomposable crosslinker in the process of producing a super absorbent polymer.

New technology for co-production of dimethyl hexylenediol and diacetone alcohol

The invention provides a new technology for co-production of dimethyl hexylenediol and diacetone alcohol, and belongs to the technical field of organic fine chemical preparation. According to the technology, methylbutynol and acetone serve as raw materials and are subjected to a reaction under the catalytic effect of alkali in a reaction solvent, then hydrolysis and layering are conducted, and theproducts dimethyl hexylenediol and diacetone alcoho are obtained after an upper-layer oil phase is washed for dealkalization, neutralized and rectified; lower-layer alkali liquor is recycled after catalyst regeneration, and water generated in the process is used for washing and hydrolysis. By means of the technology, co-production of the dimethyl hexylenediol and diacetone alcohol can be achieved, the total yield of the dimethyl hexylenediol and diacetone alcohol on the acetone is about 96%, the yield of the dimethyl hexylenediol on the methylbutynol is about 93%, and the mole ratio of the dimethyl hexylenediol to the diacetone alcohol is larger than 0.22 and is adjustable. By means of the technology, fixed investment and production cost can be effectively lowered, the added value of products, the utilization rate and the market resilience of devices are significantly increased, and the economic benefit increment is considerable.

Direct observation of reduction of Cu(II) to Cu(I) by terminal alkynes

X-ray absorption spectroscopy and in situ electron paramagnetic resonance evidence were provided for the reduction of Cu(II) to Cu(I) species by alkynes in the presence of tetramethylethylenediamine (TMEDA), in which TMEDA plays dual roles as both ligand and base. The structures of the starting Cu(II) species and the obtained Cu(I) species were determined as (TMEDA)CuCl2 and [(TMEDA)CuCl]2 dimer, respectively.