Butan-2,3-diol

Bezeichnung:Butan-2,3-diol

CAS-Nr513-85-9

Englisch Name:2,3-Butanediol

CBNumberCB4853718

SummenformelC4H10O2

Molgewicht90.12

MOL-Datei513-85-9.mol

Synonyma

Butan-2,3-diol

Butan-2,3-diol physikalisch-chemischer Eigenschaften

Schmelzpunkt	25 °C (lit.)
Siedepunkt	183-184 °C (lit.)
Dichte	1.002 g/mL at 20 °C (lit.)
Dampfdruck	<1 hPa (20 °C)
Brechungsindex	n20/D 1.433(lit.)
Flammpunkt	185 °F
storage temp.	Store below +30°C.
Löslichkeit	Chloroform, Methanol
pka	14.67±0.20(Predicted)
Aggregatzustand	Viscous Liquid
Farbe	Colorless to pale yellow
PH	7 (H2O, 20℃)Aqueous solution
Geruch (Odor)	at 0.10 % in dipropylene glycol. fruity creamy buttery
Geruchsart	creamy
Explosionsgrenze	3.1-11.4%(V)
Wasserlöslichkeit	SOLUBLE
Sensitive	Hygroscopic
Merck	14,1568
BRN	969165
Stabilität	Stable. Combustible. Incompatible with strong oxidizing agents, acid anhydrides, acid chlorides, chloroformates, reducing agents.
InChIKey	OWBTYPJTUOEWEK-UHFFFAOYSA-N
LogP	-0.92 at 25℃
CAS Datenbank	513-85-9(CAS DataBase Reference)
NIST chemische Informationen	2,3-Butanediol(513-85-9)
EPA chemische Informationen	2,3-Butanediol (513-85-9)

Sicherheit

S-Sätze:	24/25
WGK Germany	1
RTECS-Nr.	EK0532000
Selbstentzündungstemperatur	395 °C DIN 51794
TSCA	Yes
HS Code	29053980
Giftige Stoffe Daten	513-85-9(Hazardous Substances Data)
Toxizität	LD50 orally in Rabbit: > 5000 mg/kg

Gefahreninformationscode (GHS)

2,3-Butanediol Chemische Eigenschaften,Einsatz,Produktion Methoden

S-Sätze Betriebsanweisung:
S24/25:Berührung mit den Augen und der Haut vermeiden.
Beschreibung
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.
Chemische Eigenschaften
viscous colourless liquid, or colourless to white solid
Verwenden
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.
synthetische
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.
Reaktionen
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
Allgemeine Beschreibung
2,3-Butanediol is a chiral compound which is extensively utilized in chemical feedstocks and liquid fuels.
Flammability and Explosibility
Non flammable
Sicherheitsprofil
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
läuterung methode
Recrystallise it from isopropyl ether at low temperature. [Beilstein 1 IV 2524.]

2,3-Butanediol Upstream-Materialien And Downstream Produkte

Butan-2,3-diol Anbieter Lieferant Produzent Hersteller Vertrieb Händler.

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