2-Methylbuttersäure

Bezeichnung:2-Methylbuttersäure

CAS-Nr116-53-0

Englisch Name:2-Methyl butyric acid

CBNumberCB7766118

SummenformelC5H10O2

Molgewicht102.13

MOL-Datei116-53-0.mol

Synonyma

2-Methylbuttersäure

2-Methylbuttersäure physikalisch-chemischer Eigenschaften

Schmelzpunkt	-70 °C
Siedepunkt	176-177 °C (lit.)
Dichte	0.936 g/mL at 25 °C (lit.)
Dampfdruck	0.5 mm Hg ( 20 °C)
Brechungsindex	n20/D 1.405(lit.)
FEMA	2695 \| 2-METHYLBUTYRIC ACID
Flammpunkt	165 °F
storage temp.	Sealed in dry,Room Temperature
Löslichkeit	20g/l
Aggregatzustand	Liquid
pka	4.8(at 25℃)
Farbe	Clear colorless to pale yellow
Geruch (Odor)	at 10.00 % in propylene glycol. pungent acid roquefort cheese
Geruchsart	acidic
Explosionsgrenze	1.6-7.3%(V)
Wasserlöslichkeit	45 g/L (20 ºC)
JECFA Number	255
BRN	1720486
LogP	1.8 at 25℃
CAS Datenbank	116-53-0(CAS DataBase Reference)
NIST chemische Informationen	Butanoic acid, 2-methyl-(116-53-0)
EPA chemische Informationen	2-Methylbutyric acid (116-53-0)

Sicherheit

Kennzeichnung gefährlicher	C
R-Sätze:	21/22-34
S-Sätze:	26-36/37/39-45
RIDADR	UN 3265 8/PG 3
WGK Germany	1
RTECS-Nr.	EK7897000
F	13
TSCA	Yes
HazardClass	8
PackingGroup	III
HS Code	29156090

Gefahreninformationscode (GHS)

2-Methyl butyric acid Chemische Eigenschaften,Einsatz,Produktion Methoden

R-Sätze Betriebsanweisung:
R21/22:Gesundheitsschädlich bei Berührung mit der Haut und beim Verschlucken.
R34:Verursacht Verätzungen.
S-Sätze Betriebsanweisung:
S26:Bei Berührung mit den Augen sofort gründlich mit Wasser abspülen und Arzt konsultieren.
S36/37/39:Bei der Arbeit geeignete Schutzkleidung,Schutzhandschuhe und Schutzbrille/Gesichtsschutz tragen.
S45:Bei Unfall oder Unwohlsein sofort Arzt zuziehen (wenn möglich, dieses Etikett vorzeigen).
Beschreibung
2-Methylbutyric acid has a pungent, acrid odor similar to Roquefort cheese with an acrid taste. At low dilutions, it has a pleasant fruity taste. May be prepared by decarboxylation of methyl ethyl malonic acid (with heat); also by oxidation of fermentation amyl alcohol (fusel oil).
Chemische Eigenschaften
2-Methylbutyric acid has a pungent, acrid odor similar to Roquefort cheese with an acrid taste. At low dilutions, it has a pleasant, fruity taste. Slightly soluble in water, soluble in alcohol and oils. Also soluble in Propylene glycol and poorly soluble in Glycerin.
Chemische Eigenschaften
clear colorless to pale yellowish liquid
Occurrence
Occurring as the d-, l-, and dl-isomers; the racemic form has been reported found in angelica root oil and coffee; the d-isomer in the ester form has been identified in lavender oil. Also reported found in apple, apricot, berries, grapes, papaya, peach, guava, pineapple, potato, bell pepper, tomato, peppermint and spearmint oil, vinegar, wheat breads, cheeses, chicken, mutton, pork, hop oil, beer, cognac, rum, whiskies, cider, cocoa, coffee, tea, peanuts, passion fruit, trassi, mango, plum, tamarind, rice, corn oil, loquat, scallops, Chinese quince, maté, mammee apple and Roman chamomile oil, cranberry, grape brandy, oriental tobacco, and strawberry
Verwenden
2-Methylbutyric acid was used in the synthesis of 2-methylbutyric anhydride, an acylating agent.
Verwenden
2-Methylbutyric acid, can be used as food additive for butter, cream, cheese flavor deployment. It is an important raw material and intermediate used in Organic Synthesis, Pharmaceuticals, Agrochemicals and Dyestuff. It is also used in the synthesis of 2-methylbutyric anhydride.
synthetische
By decarboxylation of methyl ethyl malonic acid (with heat); also by oxidation of fermentation amyl alcohol (fusel oil).
Definition
ChEBI: A methylbutyric acid comprising a butyric acid core carrying a 2-methyl substituent. Produced from amino acid leucine during nutrient starvation in bacteria.
Aroma threshold values
Detection: 10 to 60 ppb. Aroma characteristics at 1.0%: acidic sour, pungent, ripe fruit leather, lingonberry, dirty cheesy, fermented pineapple fruity with a woody nuance
Taste threshold values
Taste characteristics at 10 ppm: dirty, acidic sour, ripe fruity, with a dairy buttery and cheesy nuance
Allgemeine Beschreibung
Enantioselective esterification of (+/-)-2-methylbutynic acid catalyzed by Chromobacterium viscosum lipase immobilized in microemulsion-based organogels has been investigated.
Flammability and Explosibility
Not classified
Biochem/physiol Actions
Taste at 10 ppm

2-Methyl butyric acid Upstream-Materialien And Downstream Produkte

2-Methylbuttersäure Anbieter Lieferant Produzent Hersteller Vertrieb Händler.

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