Heptanal

Bezeichnung:Heptanal

CAS-Nr111-71-7

Englisch Name:Heptaldehyde

CBNumberCB2451916

SummenformelC7H14O

Molgewicht114.19

MOL-Datei111-71-7.mol

Synonyma

Heptanal

Heptanal physikalisch-chemischer Eigenschaften

Schmelzpunkt	-43 °C (lit.)
Siedepunkt	153 °C (lit.)
Dichte	0.817 g/mL at 25 °C (lit.)
Dampfdruck	3 hPa (20 °C)
FEMA	2540 \| HEPTANAL
Brechungsindex	n20/D 1.413(lit.)
Flammpunkt	95 °F
storage temp.	Flammables area
Löslichkeit	1.25g/l insoluble；Very slightly soluble in water, soluble in alcohol and oils.
Aggregatzustand	Powder, Crystals or Chunks
Farbe	White to light yellow-beige
Geruch (Odor)	Green-herbaceous, vegetable-like odor
Geruchsart	green
Biologische Quelle	synthetic
Explosionsgrenze	1.1-5.2%(V)
Odor Threshold	0.00018ppm
Wasserlöslichkeit	insoluble
Sensitive	Hygroscopic
Merck	14,4658
JECFA Number	95
BRN	1560236
Dielectric constant	9.1（Ambient）
Stabilität	Stable. May be light sensitive. Flammable - readily forms explosive mixtures with air. Incompatible with strong oxidizing agents, strong bases, strong reducing agents.
LogP	2.8 at 20℃
CAS Datenbank	111-71-7(CAS DataBase Reference)
NIST chemische Informationen	Heptanal(111-71-7)
EPA chemische Informationen	Heptanal (111-71-7)

Sicherheit

Kennzeichnung gefährlicher	Xi,N
R-Sätze:	10-36/37/38-38-50/53
S-Sätze:	26-36-37-16-61-60
RIDADR	UN 3056 3/PG 3
WGK Germany	1
RTECS-Nr.	MI6900000
Selbstentzündungstemperatur	250 °C
Hazard Note	Irritant
TSCA	Yes
HS Code	2912 19 00
HazardClass	3
PackingGroup	III
Giftige Stoffe Daten	111-71-7(Hazardous Substances Data)
Toxizität	LD50 orally in Rabbit: > 5000 mg/kg LD50 dermal Rabbit > 5000 mg/kg

Gefahreninformationscode (GHS)

Heptaldehyde Chemische Eigenschaften,Einsatz,Produktion Methoden

R-Sätze Betriebsanweisung:
R10:Entzündlich.
R36/37/38:Reizt die Augen, die Atmungsorgane und die Haut.
R38:Reizt die Haut.
R50/53:Sehr giftig für Wasserorganismen, kann in Gewässern längerfristig schädliche Wirkungen haben.
S-Sätze Betriebsanweisung:
S26:Bei Berührung mit den Augen sofort gründlich mit Wasser abspülen und Arzt konsultieren.
S36:DE: Bei der Arbeit geeignete Schutzkleidung tragen.
S37:Geeignete Schutzhandschuhe tragen.
S16:Von Zündquellen fernhalten - Nicht rauchen.
S61:Freisetzung in die Umwelt vermeiden. Besondere Anweisungen einholen/Sicherheitsdatenblatt zu Rate ziehen.
S60:Dieses Produkt und sein Behälter sind als gefährlicher Abfall zu entsorgen.
Beschreibung
Heptanal has a very strong, fatty, harsh, pungent odor and an unpleasant, fatty taste. Heptanal is obtained by distilling castor oil, preferably under reduced pressure.
Chemische Eigenschaften
Heptanal has a very strong, fatty, harsh, pungent odor and an unpleasant, fatty taste.
Chemische Eigenschaften
colourless liquid
Occurrence
Heptanal is a constituent of the essential oils of ylang-ylang, clary sage, California lemon, bitter orange, rose and hyacinth Also reported found in cocoa, buckwheat, elderberry fruit and juice and babaco fruit (Carica pentagona Heilborn)
Verwenden
Heptanal is used as a synthesis intermediate in the fragrances and flavors industry. It is the precursor to 1-heptanol, ethyl heptanoate and for certain lubricants.
Verwenden
Manufacture of 1-heptanol; ethyl oenanthate.
Verwenden
Labelled Heptanal. Bioconversion of heptanal to heptanol by Saccharomyces cerevisiae and effect of C source maltose.
Definition
ChEBI: Heptanal is an n-alkanal resulting from the oxidation of the alcoholic hydroxy group of heptan-1-ol to the corresponding aldehyde. An endogenous aldehyde coming from membrane lipid oxidation, it is found in the blood of lung cancer patients and has been regarded as a potential biomarker of lung cancer. It has a role as a biomarker. It is a saturated fatty aldehyde, a n-alkanal and a medium-chain fatty aldehyde.
synthetische
Obtained by distilling castor oil, preferably under reduced pressure.
Aroma threshold values
Detection: 3 to 60 ppb.
Synthesis Reference(s)
Journal of the American Chemical Society, 105, p. 6285, 1983 DOI: 10.1021/ja00358a017
The Journal of Organic Chemistry, 31, p. 3446, 1966 DOI: 10.1021/jo01348a534
Allgemeine Beschreibung
A colorless, oily liquid with a penetrating fruity odor. Insoluble in water and less dense than water. Hence floats on water. Flash point near 141°F. Used to make perfumes and pharmaceuticals.
Air & Water Reaktionen
Flammable. Insoluble in water.
Reaktivität anzeigen
Heptaldehyde may undergo exothermic self-condensation or polymerization reactions in the presence of acids. May generate flammable and/or toxic gases with azo, diazo compounds, dithiocarbamates, nitrides, and strong reducing agents. Is readily oxidized to give heptanoic acid. Can react with air to give first peroxo acids, and ultimately heptanoic acid. These autoxidation reactions are activated by light, catalyzed by salts of transition metals, and are autocatalytic (catalyzed by the products of the reaction). The presence of stabilizers (antioxidants) retards autoxidation. Incompatible with strong oxidizers, bases and reducing agents.
Hazard
Combustible.
Health Hazard
May cause toxic effects if inhaled or absorbed through skin. Inhalation or contact with material may irritate or burn skin and eyes. Fire will produce irritating, corrosive and/or toxic gases. Vapors may cause dizziness or suffocation. Runoff from fire control or dilution water may cause pollution.
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.
Stoffwechsel
Aldehyde C-7 (heptaldehyde) is readily oxidized in the animal body to the corresponding fatty acid, which then undergoes ?-oxidation and is eventually oxidized to carbon dioxide and water . Boyland was unable to detect pimelic acid in the urine of rats fed heptanal, indicating that the compound was probably completely oxidized in the body. The finding of tumour-inhibiting action by malonic acid supported the possibility of ω-oxidation leading to the formation of glutaric and malonic acids, although the intermediate pimelic acid was not isolated. Yoshida et al. found that heptanal was not utilized as an energy source by chicks when fed at 5% in the diet for 6 days, although the diet was palatable and caused no deaths. Direct evidence was obtained by Erwin & Deitrich for the oxidation in rat, monkey and bovine brain of heptanal and other aldehydes that may arise from biologically active amines in the brain. Aldehyde-oxidizing activity was present in all the areas of bovine brain studied. It was suggested that brain aldehyde dehydrogenase may be important in oxidizing aldehydes from exogenous sources.
läuterung methode
Dry n-heptaldehyde with CaSO4 or Na2SO4 and fractionally distil it under reduced pressure. More extensive purification is by precipitation as the bisulfite compound (formed by adding the aldehyde to saturated aqueous NaHSO3) which is filtered off and recrystallised from hot H2O. The crystals, after being filtered and washed well with H2O, are hydrolysed by adding 700mL of aqueous Na2CO3 (12.5% w/w of anhydrous Na2CO3) per 100g of aldehyde. The aldehyde is then steam distilled off, separated, dried with CuSO4 and distilled under reduced pressure in a slow stream of nitrogen. [McNesby & Davis J Am Chem Soc 76 2148 1954, Beilstein 1 H 695, 1 I 357, 1 II 750, 1 III 2844, 1 IV 3314.]

Heptaldehyde Upstream-Materialien And Downstream Produkte

Heptanal Anbieter Lieferant Produzent Hersteller Vertrieb Händler.

111-71-7, Heptaldehyde Verwandte Suche:

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