(E)-2-Methylbut-2-ensure

Bezeichnung:(E)-2-Methylbut-2-ensure

CAS-Nr80-59-1

Englisch Name:Tiglic acid

CBNumberCB4199986

SummenformelC5H8O2

Molgewicht100.12

MOL-Datei80-59-1.mol

Synonyma

(E)-2-Methylbut-2-ensure

(E)-2-Methylbut-2-ensure physikalisch-chemischer Eigenschaften

Schmelzpunkt	61-64 °C(lit.)
Siedepunkt	95-96 °C12 mm Hg(lit.)
Dichte	0.969 g/mL at 25 °C(lit.)
Brechungsindex	nD81 1.4342
FEMA	3599 \| 2-METHYL-TRANS-2-BUTENOIC ACID
Flammpunkt	101°C
storage temp.	2-8°C
Löslichkeit	Soluble in Chloroform,Dichloromethane,Ethyl Acetate,DMSO,Acetone,etc.
pka	pK (25°) 5.02
Aggregatzustand	Crystalline Powder and Chunks
Farbe	White to beige
Wichte	0.969
Geruch (Odor)	at 10.00 % in dipropylene glycol. sweet dry spicy woody caramel
Geruchsart	spicy
Wasserlöslichkeit	SOLUBLE IN HOT WATER
JECFA Number	1205
Merck	14,9433
BRN	1236500
InChIKey	UIERETOOQGIECD-ONEGZZNKSA-N
LogP	1.35
CAS Datenbank	80-59-1(CAS DataBase Reference)
NIST chemische Informationen	2-Butenoic acid, 2-methyl-, (E)-(80-59-1)
EPA chemische Informationen	2-Butenoic acid, 2-methyl-, (2E)- (80-59-1)

Sicherheit

Kennzeichnung gefährlicher	C,Xi
R-Sätze:	34-36/37/38
S-Sätze:	26-36/37/39-45-24/25-27
RIDADR	UN 3261 8/PG 2
WGK Germany	2
RTECS-Nr.	GQ5430000
TSCA	Yes
HazardClass	8
PackingGroup	III
HS Code	29161980
Giftige Stoffe Daten	80-59-1(Hazardous Substances Data)

Gefahreninformationscode (GHS)

Tiglic acid Chemische Eigenschaften,Einsatz,Produktion Methoden

R-Sätze Betriebsanweisung:
R34:Verursacht Verätzungen.
R36/37/38:Reizt die Augen, die Atmungsorgane und die Haut.
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).
S24/25:Berührung mit den Augen und der Haut vermeiden.
S27:Beschmutzte, getränkte Kleidung sofort ausziehen.
Beschreibung
frarc.s-2-Methyl-2-butenoic acid has a sweet, warm, spicy odor. May be synthesized from 2-hydroxy-2-methylbutyronitrile.
Chemische Eigenschaften
WHITE TO BEIGE CRYSTALLINE POWDER AND CHUNKS
Chemische Eigenschaften
trans-2-Methyl-2-butenoic acid has a sweet, warm, spicy odor.
Occurrence
Reported found in celery leaves and stalk, cocoa, mango, dried bonito and Roman chamomile oil
Verwenden
Tiglic acid is the stable isomer of angelic acid. Tiglic acid was found as glyceride in croton oil, as butyl ester in the oil of the Roman camomile, and as geranyl tiglate in oil of geranium. Tiglic a cid is formed during the charcoaling of maple wood.
Definition
ChEBI: A 2-methylbut-2-enoic acid having its double bond in trans-configuration.
Taste threshold values
Taste characteristics at 75 ppm: sweet, brown, fruity, with ripe and jamy nuances.
Allgemeine Beschreibung
A white lustrous flaked solid with a fruity or spicy odor. About the same density as water and slightly soluble in water. May burn if heated to high temperatures. May severely irritate skin, eyes, lungs or mucous membranes.
Air & Water Reaktionen
Slightly soluble in water.
Reaktivität anzeigen
TIGLIC ACID is a carboxylic acid. Carboxylic acids donate hydrogen ions if a base is present to accept them. They react in this way with all bases, both organic (for example, the amines) and inorganic. Their reactions with bases, called "neutralizations", are accompanied by the evolution of substantial amounts of heat. Neutralization between an acid and a base produces water plus a salt. Carboxylic acids in aqueous solution and liquid or molten carboxylic acids can react with active metals to form gaseous hydrogen and a metal salt. Such reactions occur in principle for solid carboxylic acids as well, but are slow if the solid acid remains dry. Even "insoluble" carboxylic acids may absorb enough water from the air and dissolve sufficiently in Tiglic acid to corrode or dissolve iron, steel, and aluminum parts and containers. Carboxylic acids, like other acids, react with cyanide salts to generate gaseous hydrogen cyanide. The reaction is slower for dry, solid carboxylic acids. Insoluble carboxylic acids react with solutions of cyanides to cause the release of gaseous hydrogen cyanide. Flammable and/or toxic gases and heat are generated by the reaction of carboxylic acids with diazo compounds, dithiocarbamates, isocyanates, mercaptans, nitrides, and sulfides. Carboxylic acids, especially in aqueous solution, also react with sulfites, nitrites, thiosulfates (to give H2S and SO3), dithionites (SO2), to generate flammable and/or toxic gases and heat. Their reaction with carbonates and bicarbonates generates a harmless gas (carbon dioxide) but still heat. Like other organic compounds, carboxylic acids can be oxidized by strong oxidizing agents and reduced by strong reducing agents. These reactions generate heat. A wide variety of products is possible. Like other acids, carboxylic acids may initiate polymerization reactions; like other acids, they often catalyze (increase the rate of) chemical reactions.
Health Hazard
TOXIC; inhalation, ingestion or skin contact with material may cause severe injury or death. Contact with molten substance may cause severe burns to skin and eyes. Avoid any skin contact. Effects of contact or inhalation may be delayed. Fire may produce irritating, corrosive and/or toxic gases. Runoff from fire control or dilution water may be corrosive and/or toxic and cause pollution.
Brandgefahr
Non-combustible, substance itself does not burn but may decompose upon heating to produce corrosive and/or toxic fumes. Some are oxidizers and may ignite combustibles (wood, paper, oil, clothing, etc.). Contact with metals may evolve flammable hydrogen gas. Containers may explode when heated.
Sicherheitsprofil
Low toxicity by ingestion and skin contact. A severe skin irritant. When heated to decomposition it emits acrid smoke and irritating fumes.
Synthese
Synthesized from 2-hydroxy-2-methylbutyronitrile
läuterung methode
Crystallise it from water. It is steam volatile and is soluble in organic solvents. [Beilstein 2 IV 1552.]

Tiglic acid Upstream-Materialien And Downstream Produkte

(E)-2-Methylbut-2-ensure Anbieter Lieferant Produzent Hersteller Vertrieb Händler.

80-59-1, Tiglic acid Verwandte Suche:

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