Valeraldehyd

Bezeichnung:Valeraldehyd

CAS-Nr110-62-3

Englisch Name:Valeraldehyde

CBNumberCB9210837

SummenformelC5H10O

Molgewicht86.13

MOL-Datei110-62-3.mol

Synonyma

Valeraldehyd

n-Pentanal

Amylaldehyd

Valeraldehyd physikalisch-chemischer Eigenschaften

Schmelzpunkt	-92 °C
Siedepunkt	103 °C
Dichte	0.81 g/mL at 25 °C(lit.)
Dampfdruck	36 hPa (20 °C)
FEMA	3098 \| VALERALDEHYDE
Brechungsindex	n20/D 1.394(lit.)
Flammpunkt	54 °F
storage temp.	Store at +2°C to +8°C.
Löslichkeit	soluble in ethyl alcohol, ethyl ether, and other common organic solvents.
Farbe	Colorless to Light yellow
Geruch (Odor)	at 1.00 % in dipropylene glycol. fermented bready fruity nutty berry
Geruchsart	fermented
Odor Threshold	0.00041ppm
Explosionsgrenze	1.7-6.8%(V)
Wasserlöslichkeit	14 g/L (20 ºC)
Sensitive	Air Sensitive
Merck	14,9902
JECFA Number	89
BRN	1616304
Expositionsgrenzwerte	TLV-TWA 175 mg/m³ (50 ppm) (ACGIH and OSHA).
Dielectric constant	13.9（Ambient）
Stabilität	Stable. Highly flammable. Incompatible with strong oxidizing agents, acids, strong alkalies, strong reducing agents.
LogP	1.5 at 25℃ and pH7
CAS Datenbank	110-62-3(CAS DataBase Reference)
NIST chemische Informationen	Pentanal(110-62-3)
EPA chemische Informationen	Pentanal (110-62-3)

Sicherheit

Kennzeichnung gefährlicher	F,Xi
R-Sätze:	11-38-41-36/37/38
S-Sätze:	16-26-33-39-37/39
RIDADR	UN 2058 3/PG 2
OEB	A
OEL	TWA: 50 ppm (175 mg/m3) (Aldehydes)
WGK Germany	1
RTECS-Nr.	YV3600000
F	10-23
Selbstentzündungstemperatur	428 °F
Hazard Note	Irritant/Flammable/Air Sensitive
TSCA	Yes
HazardClass	3
PackingGroup	II
HS Code	29121900
Giftige Stoffe Daten	110-62-3(Hazardous Substances Data)
Toxizität	LD50 orally in rats: 5.66 ml/kg (Smyth)

Gefahreninformationscode (GHS)

Valeraldehyde Chemische Eigenschaften,Einsatz,Produktion Methoden

ERSCHEINUNGSBILD
FARBLOSE FLüSSIGKEIT MIT CHARAKTERISTISCHEM GERUCH.
PHYSIKALISCHE GEFAHREN
Die Dämpfe mischen sich leicht mit Luft. Bildung explosionsfähiger Gemische.
CHEMISCHE GEFAHREN
Bildung explosionsfähiger Peroxide wahrscheinlich. Kann polymerisieren beim Erwärmen und unter Einfluss anorganischer Säurenund Basen. Feuer- und Explosionsgefahr.
ARBEITSPLATZGRENZWERTE
TLV: 50 ppm (als TWA) (ACGIH 2005).
MAK nicht festgelegt (DFG 2005).
AUFNAHMEWEGE
Aufnahme in den Körper durch Inhalation der Dämpfe.
INHALATIONSGEFAHREN
Beim Verdampfen bei 20°C kann schnell eine gesundheitsschädliche Kontamination der Luft eintreten.
WIRKUNGEN BEI KURZZEITEXPOSITION
WIRKUNGEN BEI KURZZEITEXPOSITION:
Die Substanz reizt die Augen, die Haut und die Atemwege.
LECKAGE
Belüftung. Zündquellen entfernen. Ausgelaufene Flüssigkeit möglichst in abdichtbaren Behältern sammeln. Reste mit Sand oder inertem Absorptionsmittel aufnehmen und an einen sicheren Ort bringen. NICHT in die Kanalisation spülen. Dampf mit feinem Wassersprühstrahl niederschlagen. NICHT in die Umwelt gelangen lassen. Persönliche Schutzausrüstung: Atemschutzfilter für organische Gase und Dämpfe.
R-Sätze Betriebsanweisung:
R11:Leichtentzündlich.
R38:Reizt die Haut.
R41:Gefahr ernster Augenschäden.
R36/37/38:Reizt die Augen, die Atmungsorgane und die Haut.
S-Sätze Betriebsanweisung:
S16:Von Zündquellen fernhalten - Nicht rauchen.
S26:Bei Berührung mit den Augen sofort gründlich mit Wasser abspülen und Arzt konsultieren.
S33:Maßnahmen gegen elektrostatische Aufladungen treffen.
S39:Schutzbrille/Gesichtsschutz tragen.
S37/39:Bei der Arbeit geeignete Schutzhandschuhe und Schutzbrille/Gesichtsschutz tragen.
Beschreibung
Valeraldehyde is one of the key volatile flavor compounds identified in cooked rice, beef fish meat and uncured ham. Its smell is described as fermented, bready, fruity, nutty, berry.It is an alkyl aldehyde used in flavoring Compounds, resin chemistry, rubber accelerators.
Chemische Eigenschaften
Valeraldehyde is a colorless flammable liquid with a strong acrid, pungent odor. At low levels, the taste is warm, slightly fruity and nut-like.The odor threshold is 0.028 ppm. Slightly soluble in water; soluble in alcohol and ether.
Occurrence
Valeraldehyde is naturally occurring (e.g., plant volatile). Reported found among the constituents of several essential oils: Brazilian sassafras, Bulgarian rose, Bulgarian clary sage and others. Also in the distillates from leaves of various Eucalyptus species: E. cinereea, E. globulus, E. dives, E. maideni and E. hemilampra. Also reported found in fresh apple, banana, sweet cherry, black currant berries, fresh blackberry, Bantu beer, plum brandy, cardamom, coriander leaf, unprocessed rice, Bourbon vanilla, cooked shrimp, scallop, hog plum and clary sage.
Verwenden
Valeraldehyde is mainly used for hydrogenation to Isoamyl alcohol and oxidation to valeric acid. It can also be used as a raw material for fragrances, resin chemistry, and rubber accelerators.
Application
Valeraldehyde is used as a gaseous standard in the study of the sorptive loss pattern for volatile compounds.
Valeraldehyde has been used to study its time-weighted average sampling using solid-phase microextraction (SPME) device.
Valeraldehyde is used in flavoring compounds and as a rubber accelerator.
Valeraldehyde is also used extensively as a natural and synthetic flavoring agent. It is used as a top note for flavor to give identity (fruity, nutty) on first impression and is a component of rose oil used to flavor foods, beverages and chewing tobacco (Furia, 1972; Rogers, 1981; NLM, 1996).
Valeraldehyde is mainly used as a chemical intermediate. As a starting material in industrial organic synthesis, it is hydrogenated to 1-pentanol, oxidized to valeric acid, and aminated to 1-aminopentane (Falbe et al., 1985; NLM, 1996).
synthetische
Valeraldehyde can be prepared by oxidation of the corresponding alcohol, 1-pentanol or by reduction of n-valeric acid (Opdyke, 1979; Lewis, 1993). Valeraldehyde is one of a number of aliphatic aldehydes industrially prepared by the oxo process, which involves the reaction of olefins with carbon monoxide and hydrogen in the presence of a catalyst. Use of a cobalt carbonyl complex as catalyst required high pressure in an older process, which has been largely replaced by a low-pressure process based on rhodium complex catalysts, such as a tris (alkyldiarylphosphine) rhodium carbonyl hydride.
Definition
ChEBI: Valeraldehyde is a saturated fatty aldehyde composed from five carbons in a straight chain. It has a role as a plant metabolite.
Aroma threshold values
Detection: 12 to 100 ppb
Taste threshold values
Taste characteristics at 25 ppm: winey, fermented, bready and cocoa chocolate notes.
Allgemeine Beschreibung
A colorless liquid. Slightly soluble in water and less dense than water. Flash point 54°F. Vapors heavier than air. Used to make artificial flavorings and rubber.
Air & Water Reaktionen
Highly flammable. Slightly soluble in water. Valeraldehyde may be sensitive to prolonged exposure to air.
Reaktivität anzeigen
Valeraldehyde is an aldehyde. Aldehydes are frequently involved in self-condensation or polymerization reactions. These reactions are exothermic; they are often catalyzed by acid. Aldehydes are readily oxidized to give carboxylic acids. Flammable and/or toxic gases are generated by the combination of aldehydes with azo, diazo compounds, dithiocarbamates, nitrides, and strong reducing agents. Aldehydes can react with air to give first peroxo acids, and ultimately carboxylic acids. These autoxidation reactions are activated by light, catalyzed by salts of transition metals, and are autocatalytic (catalyzed by the products of the reaction). The addition of stabilizers (antioxidants) to shipments of aldehydes retards autoxidation. Valeraldehyde is incompatible with oxidizing agents, strong bases and strong reducing agents.
Health Hazard
n-Valeraldehyde is a moderate skin andeye irritant. At a high concentration theirritation may be severe; 100 mg/day wasseverely irritating on rabbits’ eyes. Pure liquidcaused severe irritation to guinea pigskin. The systemic toxicity of valeraldehydeis very low.
LD50 value, skin (rabbits): 4857 mg/kg
LD50 value, oral (rats): 3200 mg/kg
Inhalation toxicity is very low. Exposure to4000 ppm for air was lethal to rats.
Brandgefahr
HIGHLY FLAMMABLE: Will be easily ignited by heat, sparks or flames. Vapors may form explosive mixtures with air. Vapors may travel to source of ignition and flash back. Most vapors are heavier than air. They will spread along ground and collect in low or confined areas (sewers, basements, tanks). Vapor explosion hazard indoors, outdoors or in sewers. Runoff to sewer may create fire or explosion hazard. Containers may explode when heated. Many liquids are lighter than water.
Sicherheitsprofil
Moderately toxic by ingestion. Mddly toxic by inhalation and s h contact. A severe eye and skin irritant. A very dangerous fire hazard when exposed to heat or flame. %%en heated to decomposition it emits acrid smoke and irritating fumes. See also ALDEHYDES.
mögliche Exposition
Valeraldehyde is used in food flavorings; in resin chemistry. It is also used in the acceleration of rubber vulcanization.
Carcinogenicity
n-Valeraldehyde caused chromosomal and DNA effects in mammalian cells in culture but was not mutagenic in an Ames bacterial test.
Versand/Shipping
UN2058 Valeraldehyde, Hazard Class: 3; Labels: 3-Flammable liquid.
läuterung methode
Purify pentanal via the bisulfite derivative (see 2-butanone above for the preparation and decomposition of the bisulfite derivative). [Birrell & Trotman-Dickinson J Chem Soc 2059 1960, Beilstein 1 H 676, 1 IV 3268.] The 2,4-dinitrophenylhydrazone [2057-84-3] M 266.3 has m 103-105o (from EtOH). [Beilstein 15 III/IV 429.]
Inkompatibilitäten
Vapor may form explosive mixture with air. Incompatible with oxidizers (chlorates, nitrates, peroxides, permanganates, perchlorates, chlorine, bromine, fluorine, etc.); contact may cause fires or explosions. Keep away from alkaline materials, strong bases, strong acids, oxoacids, epoxides, caustics, amines.
Waste disposal
Dissolve or mix the material with a combustible solvent and burn in a chemical incinerator equipped with an afterburner and scrubber. All federal, state, and local environmental regulations must be observed.

Valeraldehyde Upstream-Materialien And Downstream Produkte

Valeraldehyd Anbieter Lieferant Produzent Hersteller Vertrieb Händler.

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