1,4-BUTYNEDIOL

PRODUCT IDENTIFICATION
CAS NO. 110-65-6

1,4-BUTYNEDIOL

EINECS NO. 203-788-6
FORMULA HOCH2C¡ÕCCH2OH
MOL WT. 86.09
H.S. CODE  

TOXICITY

 Oral rat LD50: 105 mg/kg
SYNONYMS Butynediol; 2-butyne-1,4-diol; 2-Butin-1,4-diol;
but-2-yne-1,4-diol; Bis(hydroxymethyl)acetylene; 1,4-Dihydroxy-2-butyne; 2-Butynediol; But-2-in-1,4-diol (German); But-2-ino-1,4-diol ((Spanish); But-2-yne-1,4-diol (French);

PRICE

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CLASSIFICATION

SOLVENT / DIOLS / ALKYNE

PHYSICAL AND CHEMICAL PROPERTIES
PHYSICAL STATE yellow to brown flake
MELTING POINT 52 - 55 C
BOILING POINT

238 C

SPECIFIC GRAVITY 1.2
SOLUBILITY IN WATER Soluble

SOLVENT SOLUBILITY

 Soluble in alcohol, aqueous acids and acetone
pH  
VAPOR DENSITY  
AUTOIGNITION

 

NFPA RATINGS Health: 2; Flammability: 1; Reactivity: 0

REFRACTIVE INDEX

  
FLASH POINT 152 C
STABILITY Stable under ordinary conditions

DESCRIPTION AND APPLICATIONS
Alcohols are very weak acids as they lose H+ in the hydroxyl group. Alcohols undergoes dehydration reaction which means the elimination of water molecule  replaced by a pi bond between two adjacent carbon atoms to form alkenes under heating in the presence of strong acids like hydrocloric acid or phosphoric acid. Primary and secondary alcohols can be oxidized to aldehydes and ketones respectively. Carboxylic acids are obtained from oxidation of aldehydes. Oxidation in organic chemistry can be considered to be the loss of hydrogen or gain of oxygen and reduction to gain hydrogen or loss of oxygen. Tertiary alcohols do not react to give oxidation products as they have no H attached to the alcohol carbon. Alcohols undergoes important reactions called nucleophilic substitution in which an electron donor replaces a leaving group, generally conjugate bases of strong acids, as a covalent substitute of some atom. One of important reaction of alcohol is condensation. Ethers are formed by the condensation of two alcohols by heating with sulfuric acid; the reaction is one of dehydration. Almost infinite esters are formed through condensation reaction called esterification between carboxylic acid and alcohol, which produces water. Alcohols are important solvents and chemical raw materials. Alcohols are intermediates for the production of target compounds, such as pharmaceuticals, veterinary medicines, plasticizers, surfactants, lubricants, ore floatation agents, pesticides, hydraulic fluids, and detergents.

Butynediol, an C-4 diol containing triple carbon bond, is used as a corrosion inhibitor, a polymerization accelerator, metal complex solution, a defoliant solvent stabilizer and electroplating brightener additive. It is used as a biodegradable chemical intermediate to make pesticides, biocides and pharmaceuticals.

SALES SPECIFICATION

SOLID

APPEARANCE

yellow to brown flake

CONTENT

98.0% min

MELTING POINT

50 - 55 C

FORMALDEHYDE

0.5% max

SOLUTION

APPEARANCE

clear liquid

CONTENT

55.0% min

FORMALDEHYDE

0.5% max

TRANSPORTATION
PACKING 25kgs in bag, 200kgs in drum
HAZARD CLASS 6.1 (Packing Griup: III)
UN NO. 2716
OTHER INFORMATION
European Hazard Symbols: T, Risk Phrases: 25/36/37/38, Safety Phrases: 22/36/45

GENERAL DESCRIPTION OF ALKYNE
Alkynes are aliphatic hydrocarbons that have one or more carbon-carbon triple bonds. The general structure of the alkyne hydrocarbons with one triple bond is CnH2n-2. They are insoluble in water but easily soluble in common organic solvents of low polarity. The features of alkynes in chemical synthesis is due to the acidity of hydrogen atoms bonded to triply bonded carbons as well as the triple bonds themselves. Addition reactions are typical in alkyne reactions; halogenation, hydrogenation, hydrohalogenation, hydration, oxidative cleavage,  nitrile formation and acidity of terminal alkynes. Polymerisation and substitution reactions are also useful in chemical synthesis.
  • Addition Reactions
    • Catalytic Hydrogenation by Pt and Pd hydrogenation catalysts to yeild alkanes without isolation of alkene intermediates.
    • Catalytic Hydrogenation by Lindlar's catalyst to yeild cis- or trans- alkenes without further reduction to alkanes
    • Addition by Electrophilic Reagents
      • Addition of halides (chlorine, bromine, iodine) to yield dihalogen substituted alkanes at the double bond site
      • Addition of hydrogen halides (HCl, HBr, HI) to yield monohalogen substituted alkenes or dihalogen substituted alkanes
    • Hydration of alkynes to yield ketone products through enol tautomer intermediate stage, whereas the hydration of double bonds gives alcohol products (exceptionally acetylene yields acetaldehyde ).
    • Hydroboration by disiamylborane to yield ketones or aldehydes
    • Oxidation cleavages of the triple-bond to give carboxylic acid products with oxidizing agents (potassium permanganate and ozone)
  • Nucleophilile Addition by sp-hybrid carbon atoms of the triple-bond render alkynes (nitrile formation)
  • Nucleophilile Reduction by solutions of sodium in liquid ammonia to trans-alkenes

The name of all alkynes end in "-yne" adding a prefix to indicate the location of the triple bond in the molecule.

COMPOUND

SYNONYM

FORMULA

CAS RN

M.P (C)

B.P (C)

Ethyne

Acetylene

 C2H2 74-86-2

-84.0

 -28

Propyne

Methyl acetylene

 C3H4  74-99-7 -103 -23

1,3-Butadiyne

Diacetylene

 C4H2 460-12-8

 

10

1-Butyne

Ethyl acetylene

 C4H6 107-00-6 -125.7

8

2-Butyne

 Crotonylene C4H6 503-17-3 -32.2 27

1,3-Pentadiyne

 

 C5H4 4911-55-1

3-Penten-1-yne

Propenyl acetylene

 C5H6 2206-23-7

 

 

2-Methyl-1-buten-3-yne

Isopropenyl acetylene

 C5H6 78-80-8

-113

 32

1-Penten-3-yne

Methyl vinyl acetylene

 C5H6 646-05-9

1-Penten-4-yne

Allyl acetylene

 C5H6 871-28-3

 

 

2-Pentyne

Ethyl methyl acetylene

 C5H8 627-21-4 -109 56

3-Methyl-1-butyne

Isopropyl acetylene

 C5H8 598-23-2 -89.7

26

1-Pentyne

Propyl acetylene

 C5H8 627-19-0 -106

40

3-Hexyne

Diethyl acetylene

 C6H10 928-49-4 -103

81

2-Hexyne

Methyl propyl acetylene

 C6H10 764-35-2 -89.1

84

4-Methyl-1-pentyne

Isobutyl acetylene

 C6H10 7154-75-8 -105

61

1-Hexyne

Butyl acetylene

 C6H10 693-02-7 -131.9

71

3-Methyl-1-pentyne

sec-Butyl acetylene

 C6H10 922-59-8

58

4-Methyl-2-pentyne

Isopropyl methyl acetylene

 C6H10 21020-27-9

-110

73

3,3-Dimethyl-1-butyne

tert-Butyl acetylene

 C6H10 917-92-0 -78.2 38

1,5-Hexadiyne

Dipropargyl

 C6H6 628-16-0

-6

86

1,4-Hexadiyne

 

 C6H6 10420-91-4

79

1,5-Hexadien-3-yne

Divinyl acetylene

 C6H6 821-08-9

1-Hexen-3-yne

Ethyl vinyl acetylene

 C6H8 13721-54-5

84

4-Methyl-2-hexyne

sec-Butyl methyl acetylene

C7H12

 20198-49-6 -108

100

2-Methyl-3-hexyne

Isopropyl ethyl acetylene

 C7H12

-117

95

5-Methyl-2-hexyne

Isobutyl methyl acetylene

 C7H12 53566-37-3

-93

102

3-Ethyl-1-pentyne

 

 C7H12

84

1-Heptyne

n-Pentyl acetylene

 C7H12 628-71-7

-81

100

4,4-Dimethyl-2-pentyne

tert-Butyl methyl acetylene

 C7H12 999-78-0

83

3-Heptyne

Ethyl propyl acetylene

 C7H12 2586-89-2

-131

107

4,4-Dimethyl-1-pentyne

Neopentyl acetylene

 C7H12

-75

78

2-Heptyne

n-Butyl methyl acetylene

 C7H12 1119-65-9

112

1,6-Heptadiyne

 

 C7H8 2396-63-6

108

1,7-Octadiyne

 

 C8H10 871-84-1

 

135

2,6-Octadiyne

C8H10 764-73-8

Cyclooctyne

 

 C8H12 1781-78-8

4-Octyne

Dipropyl acetylene

 C8H14 1942-45-6 -102.5

132

1-Octyne

n-Hexyl acetylene

 C8H14 629-05-0 -79.3 126

3-Octyne

n-Butyl ethyl acetylene

 C8H14 15232-76-5 -104

133

2-Octyne

n-Pentyl methyl acetylene

 C8H14 2809-67-8 -61.6 138

1,8-Nonadiyne

 

 C9H12 2396-65-8 -21

Cyclononyne

 

 C9H14 6573-52-0

1-Nonyne

n-Heptyl acetylene

 C9H16 3452-09-3 -50 151

3-Nonyne

Methyl n-pentyl acetylene

 C9H16 20184-89-8

157

2-Nonyne

n-Hexyl methyl acetylene

 C9H16 19447-29-1

162

4-Nonyne

n-Butyl propyl acetylene

 C9H16 20184-91-2

Cyclodecyne

 

 C10H16 3022-41-1

5-Decyne

Di-n-butyl acetylene

 C10H18 1942-46-7

-73

3-Decyne

Ethyl n-hexyl acetylene

 C10H18 2384-85-2

179

1-Decyne

n-Octyl acetylene

 C10H18 764-93-2

-44

174

2,2,5,5-Tetramethyl-3-hexyne

Di-tert-butyl acetylene

 C10H18 17530-24-4

1-Undecyne

n-Nonyl acetylene

 C11H20 2243-98-3 -25

195

6-Dodecyne

Di-n-pentyl acetylene

 C12H22 6975-99-1

1-Dodecyne

n-Decyl acetylene

 C12H22 765-03-7

-19

225

1-Tridecyne

n-Undecyl acetylene

 C13H24 26186-02-7 -5

234

1-Tetradecyne

n-Dodecyl acetylene

 C14H26 765-10-6

252

1-Pentadecyne

n-Tridecyl acetylene

 C15H28 765-13-9

10

269

1-Hexadecyne

n-Tetradecyl acetylene

 C16H30 629-74-3

25

 285

1-Heptadecyne

n-Pentadecyl acetylene

 C17H32 26186-00-5 22

300

1-Heptadecyne

n-Pentadecyl acetylene

 C17H32 26186-00-5

22

300

2-Octadecyne

C18H34

325

1-Octadecyne

C18H34 629-89-0

1-Nonadecyne

C19H36

33

329

1-Eicosyne

 1-Icosyne C20H38

36

 342

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