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HomeProduct name list2,3-Butanediol

2,3-Butanediol

Synonym(s):2,3-Butanediol;2,3-Butylene glycol

  • CAS NO.:513-85-9
  • Empirical Formula: C4H10O2
  • Molecular Weight: 90.12
  • MDL number: MFCD00004523
  • EINECS: 208-173-6
  • SAFETY DATA SHEET (SDS)
  • Update Date: 2024-08-11 15:28:25
2,3-Butanediol Structural

What is 2,3-Butanediol?

Description

2,3-Butanediol(23BD) is the organic compound with the formula (CH3CHOH). It is classified as a vic-diol (glycol). It exists as three stereoisomers, a chiral pair and the meso isomer. All are colorless liquids. Applications include precursors to various plastics and pesticides.
2,3-Butanediol is a commodity chemical usually produced from oil. It can be used as a precursor in the manufacture of a range of chemical products, including the solvents methyl ethyl ketone (MEK), gamma-butyrolactone (GBL), and 1,3-butadiene.

Chemical properties

viscous colourless liquid, or colourless to white solid

The Uses of 2,3-Butanediol

2,3-Butanediol (2,3-BD) is a promising bulk chemical with a potentially wide range of applications e.g., in the manufacture of printing inks, perfumes, synthetic rubber, fumigants, antifreeze agents, fuel additives, foodstuffs and pharmaceuticals. Its high heating value and ability to increase the octane number of fuels make 2,3-BD a promising drop-in fuel. It can also be converted to methyl-ethyl ketone (MEK), which is considered an effective liquid fuel additive. After combination with MEK and hydrogenation reaction, 2,3-BD can be converted to octane, which is used to produce high-quality aviation fuel.

Preparation

2,3-Butanediol is prepared by hydrolysis of 2,3-epoxybutane:
(CH3CH)2O + H2O → CH3(CHOH)2CH3

Definition

ChEBI: 2,3-Butanediol is a butanediol in which hydroxylation is at C-2 and C-3. It is a butanediol, a glycol and a secondary alcohol.

Reactions

2,3-Butanediol undergo dehydration to form butanone (methyl ethyl ketone):
(CH3CHOH)2 → CH3C(O)CH2CH3 + H2O
It can also undergo deoxydehydration to form butene:
(CH3CHOH)2 + 2 H2 → C4H8 + 2 H2O

General Description

2,3-Butanediol is a chiral compound which is extensively utilized in chemical feedstocks and liquid fuels.

Flammability and Explosibility

Non flammable

Safety Profile

Mildly toxic by ingestion. See also ETHYLENE GLYCOL. Flammable when exposed to heat or flame. Incompatible with oxidizing materials. To fight fire, use alcohol foam, CO2, dry chemical. When heated to decomposition it emits acrid smoke and fumes

Purification Methods

Recrystallise it from isopropyl ether at low temperature. [Beilstein 1 IV 2524.]

Properties of 2,3-Butanediol

Melting point: 25 °C (lit.)
Boiling point: 183-184 °C (lit.)
Density  1.002 g/mL at 20 °C (lit.)
vapor pressure  <1 hPa (20 °C)
refractive index  n20/D 1.433(lit.)
Flash point: 185 °F
storage temp.  Store below +30°C.
solubility  Chloroform, Methanol
pka 14.67±0.20(Predicted)
form  Viscous Liquid
color  Colorless to pale yellow
PH 7 (H2O, 20℃)Aqueous solution
Odor at 0.10 % in dipropylene glycol. fruity creamy buttery
explosive limit 3.1-11.4%(V)
Water Solubility  SOLUBLE
Sensitive  Hygroscopic
Merck  14,1568
BRN  969165
Stability: Stable. Combustible. Incompatible with strong oxidizing agents, acid anhydrides, acid chlorides, chloroformates, reducing agents.
CAS DataBase Reference 513-85-9(CAS DataBase Reference)
NIST Chemistry Reference 2,3-Butanediol(513-85-9)
EPA Substance Registry System 2,3-Butanediol (513-85-9)

Safety information for 2,3-Butanediol

Signal word Warning
Pictogram(s)
ghs
Exclamation Mark
Irritant
GHS07
GHS Hazard Statements H227:Flammable liquids
Precautionary Statement Codes P210:Keep away from heat/sparks/open flames/hot surfaces. — No smoking.
P280:Wear protective gloves/protective clothing/eye protection/face protection.
P403+P235:Store in a well-ventilated place. Keep cool.
P501:Dispose of contents/container to..…

Computed Descriptors for 2,3-Butanediol

InChIKey OWBTYPJTUOEWEK-UHFFFAOYSA-N

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