2,5-dimethyl-3-hexyne-2,5-diol

Structural formula
General
Surname	2,5-dimethyl-3-hexyne-2,5-diol
other names	2,5-dimethylhex-3-yn-2,5-diol ( IUPAC )
Molecular formula	C 8 H 14 O 2
Brief description	whitish solid
External identifiers / databases
CAS number 142-30-3 ECHA InfoCard 100.005.031 PubChem 8883 ChemSpider 8545 Wikidata Q27253671
properties
Molar mass	142.20 g mol −1
Physical state	firmly
density	0.949 g cm −3
Melting point	90-94 ° C
boiling point	121-123 ° C (7 mmHg) 205 ° C
Vapor pressure	0.025 hPa (40.3 ° C)
solubility	soluble in water (240 g / l at 20 ° C) Soluble in ethanol, diethyl ether, acetone and benzene
safety instructions
GHS labeling of hazardous substances danger H and P phrases H: 317-334 P: 261-280-342 + 311
Toxicological data	9000 mg kg −1 ( LD 50 ,  rat ,  oral )
As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

2,5-Dimethyl-3-hexyne-2,5-diol is a chemical compound from the group of diols with an additional C≡C triple bond .

Extraction and presentation

2,5-Dimethyl-3-hexyne-2,5-diol can be obtained by reacting acetone with ethyne in the presence of potassium hydroxide .

properties

2,5-Dimethyl-3-hexyne-2,5-diol is an off-white solid that is soluble in water.

use

It is known to be used as a wire drawing lubricant, antifoam agent, adhesion promoter in resin coatings and as an intermediate product for the production of other chemical compounds.

By reduction in the presence of a palladium - or platinum catalyst may be 2,5-dimethyl-2,5-hexanediol can be obtained.

Individual evidence

1. ↑ ^{a b c d e f g} data sheet 2,5-dimethyl-3-hexyne-2,5-diol, 98% from Sigma-Aldrich , accessed on December 3, 2018 ( PDF ).
2. ↑ ^{a b c d} data sheet 2,5-dimethyl-3-hexyne-2,5-diol, (±) + meso, 98% from AlfaAesar, accessed on December 3, 2018 ( PDF )(JavaScript required) .
3. ↑ ^{a b c} data sheet 2,5-dimethyl-3-hexyne-2,5-diol (PDF) from Merck , accessed on December 3, 2018.
4. ↑ David R. Lide: CRC Handbook of Chemistry and Physics A Ready-reference Book of Chemical and Physical Data . CRC Press, 1995, ISBN 978-0-8493-0595-5 , pp. 220 ( limited preview in Google Book search).
5. ↑ ^{a b c} Entry on 2,5-dimethyl-3-hexyne-2,5-diol in the Hazardous Substances Data Bank , accessed on December 3, 2018.
6. ↑ Google Patents: 2,5-Dimethyl-3-hexyne-2,5-diol production - Google Patents , accessed December 3, 2018.