Product Name: |
2,3-Butanedione |
Synonymer: |
dimnertong; 2,3-butandion2,3-diketobutan dimetylglyoksal; 2,3-butandion97%; to2,3-butylketon; 2, 3 - butyldiketon; 2,3-DIOXOBUTAN; 2,3-DIKETOBUTAN; 2,3-BUTANEDIONE |
CAS: |
431-03-8 |
MF: |
C4H6O2 |
MW: |
86.09 |
EINECS: |
207-069-8 |
Product Categories: |
Ketones;Organic Building Blocks;B;Bioactive Small Molecules;Building Blocks;C3 to C6;Organics;Biochemistry;Reagents for Oligosaccharide Synthesis;ketone Flavor;Carbonyl Compounds;Cell Biology;Chemical Synthesis |
Mol File: |
431-03-8.mol |
|
Melting point |
-4--2 °C |
Boiling point |
88 °C(lit.) |
tetthet |
0.985 g/mL at 20 °C |
damptetthet |
3 (vs air) |
vapor pressure |
52.2 mm Hg ( 20 °C) |
FEMA |
2370 | DIACETYL |
brytningsindeks |
n20 / D 1.394 (lys) |
Fp |
45 ° F |
lagringstemperatur |
2-8 ° C |
solubility |
200g/l |
form |
Liquid |
farge |
Klar gul |
explosive limit |
2,4-13,0% (V) |
Luktterskel |
0,00005 ppm |
Vannløselighet |
200 g / l (20 ºC) |
JECFA-nummer |
408 |
Merck |
14,2966 |
BRN |
605398 |
Stability: |
Stabil. Brannfarlig. Uforenlig med syrer, sterke baser, metaller, reduksjonsmidler, oksidasjonsmidler. Beskytt mot fuktighet og vann. Legg merke til lavt flammepunkt. |
InChIKey |
QSJXEFYPDANLFS-UHFFFAOYSA-N |
CAS DataBase Reference |
431-03-8 (CAS DataBase Reference) |
NIST Chemistry Reference |
2,3-Butanedione(431-03-8) |
EPA Substance Registry System |
2,3-butandion (431-03-8) |
Farekoder |
F, Xn |
Risk Statements |
11-20/22-38-41-36/38-20/21/22-37/38 |
Safety Statements |
9-16-26-37/39-36/37/39-39 |
RIDADR |
UN 2346 3/PG 2 |
WGK Germany |
2 |
RTECS |
EK2625000 |
F |
13 |
Autoignition Temperature |
365 °C |
TSCA |
Ja |
HazardClass |
3 |
PackingGroup |
II |
HS kode |
29141990 |
Hazardous Substances Data |
431-03-8 (data om farlige stoffer) |
Toksisitet |
LD50 oralt hos rotter: 1580 mg / kg (Jenner) |
Content analysis |
Innholdet av 2,3-butandion blir analysert i henhold til metode 1 (hydroksylaminmetode) av aldehyd- og ketonanalyseringsmetoder (OT-7). Prøvevekten er 500 mg. Den tilsvarende faktoren (e) i beregningen er 21,52. Det er passende å analyseres ved hjelp av en ikke-polær kolonne i GT-10-4. |
Toksisitet |
Not specified by ADI
(FAO/WHO,1994) |
Mengderestriksjoner |
FEMA (mg / kg) :FEMA (mg / kg) ï ¼ softdrink 2,5 ï ›kald drikke 5,9 9› søtsaker 21 ï ›bakervarer 44 ï› puddinger 19 ï ›tyggegummi 35 ï› forkortelse 11. |
Kjemiske egenskaper |
Gul til gulgrønn væske, en kremaktig duft etter fortynning (1 mg / kg), høyt damptrykk er, fordamper raskt ved romtemperatur, smeltepunkt-3~-4â „ƒï¼Œ kokepunkt 87~88â„ ƒ, flammepunkt 13â „ ƒ. Løselig i etanol, eter, ikke-flyktig olje og propylenglykol, løselig i glyserin og vann, uoppløselig i mineralolje. Naturlige produkter finnes i laurbærolje, ajawa-olje, hvite rotolje, bringebær, jordbær, fløte, vin osv. Fordi den er flyktig, eksisterer den bare i primærdestillat og destillert vann. |
Bruk |
Den oppfyller GB2760 1996-standarder for spiselige krydder for øyeblikket. Den brukes hovedsakelig til tilberedning av matessens som krem, gjæring av ost og kaffe-skrevet essens, brukt i melk, smør, margarin, ost, søtsaker og andre smaker, som bær, karamell, sjokolade, kaffe, kirsebær, vaniljestang, honning, kakao , frukt, vin, aroma, rom, nøtter, mandler, ingefær og så videre. Det kan også brukes i frisk frukt duft essens for sminke eller ny typeessens i spormengde, og brukes som gelatinherdende middel og fotografisk klebemiddel. |
Production |
I naturen, Diacetylexists mye i mange plante-essensielle oljer, som irisolje, angelica olje, laurbærolje, etc. Det er hovedkomponenten i smør og andre naturlige produkter duft. |
Kategori |
flammable liquid |
Acute toxicity |
Oral rotte LD50: 1580 mg / kg, orale mus: 250 mg / kg |
Stimulus data |
Hudkanin 500 mg / 24 timer i midten |
Brennbarhet og farlige egenskaper |
Flammable in case of fire, high temperature and oxidant, Combustion produces irritating smoke. |
Oppbevaring |
Ventilated and dry warehouse with low temperature. Separated from oxidant, acid. |
Kjemiske egenskaper |
liquid with a butter-like odour |
Kjemiske egenskaper |
2,3-Butanedione is a constituent of many fruit and food aromas and well-known as a constituent of butter. Many methods are known for itsmanufacture, for example, dehydrogenation of 2,3-butanediol with a copper chromite catalyst. Biotechnological production on an industrial scale is referred. It is used mainly in aromas for butter and roasted notes. Large quantities are used for flavoring margarine; small amounts are used in perfumes. |
Kjemiske egenskaper |
Diacetyl har en veldig sterk smøraktig lukt i veldig fortynnet løsning. |
Hendelse |
Rapportert i oljene av: finsk furu, angelica og lavendel; i blomstene til Polyalthiacanangioides Boerl. var. angustifolia og Fagroea racemosa Jack. Følgende planter er også rapportert å inneholde diacetyl: Monodora grandifloraBenth., Magnolia tripetale L., Ximenia aegyptiaca L., Petasites fragransPresl., Diverse narcisser og tulipaner. Det er blitt identifisert i visse typer vin, de naturlige aromaene av bringebær og jordbær, og oljene av lavendel, lavandin, Réunion geranium, Java citronella og Cistus ladaniferusL. Det er også rapportert å bli funnet i ligonbær, guava, bringebær, jordbær, kål, erter, tomat, eddik, forskjellige oster, yoghurt, melk, smør, kylling, storfekjøtt, fårekjøtt, svinekjøtt, cognac, øl, vin, whisky, te andcoffee. |
Bruker |
2,3-Butanedione is a flavoring agent that is a clear yellow to yellowish green liquid with a strong pungent odor. It is also known as 2,3-butanedione and is chemically synthesized from methyl ethyl ketone. It is miscible in water, glycerin, alcohol, and ether, and in very dilute water solution it has a typical buttery odor and flavor. |
Bruker |
Inactivates aminopeptidase-N.1 Cyclocondensation with amines has been used to form triazine2 and pteridine ring systems.3 Also used as a precursor to α-diones.4 |
Bruker |
Bærer av aroma av smør, eddik, kaffe og annen mat. |
Definisjon |
ChEBI: Analfa-diketon som er butan substituert med oksogrupper i posisjon 2 og 3. Det er en metabolitt produsert under malolaktisk gjæring. |
Preparation |
From methyl ethyl ketone by converting to the isonitroso compound and then decomposing to diacetyl by hydrolysis with HCl; by fermentation of glucose via methyl acetyl carbinol. |
Aroma terskelverdier |
Deteksjon: 0,3 til 15 ppm: gjenkjenning: 5 ppb |
Smakterskelverdier |
Taste characteristics at 50 ppm: sweet, buttery, creamy and milky. |
Generell beskrivelse |
A clear colorless liquid with a strong chlorine-like odor. Flash point 80°F. Less dense than water. Vapors heavier than air. |
Air & Water Reactions |
Meget brannfarlig. Løselig i vann. |
Reaktivitetsprofil |
2,3-Butanedione is a flammable liquid, b.p. 88° C, moderately toxic. When heated to decomposition 2,3-Butanedione emits acrid smoke and fumes [Sax, 9th ed., 1996, p. 544]. |
Health Hazard |
Innånding eller kontakt med materialet kan irritere eller brenne hud og øyne. Brann kan gi irriterende, etsende og / eller giftige gasser. Damp kan forårsake svimmelhet eller kvelning. Avrenning fra brannkontroll kan forårsake forurensning. |
Fire Hazard |
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. |
Sikkerhetsprofil |
En gift ved skade og intraperitoneal ruter. Hudirriterende. Menneskelig inhalasjonsfare ved produksjon av popcorn. Menneskelige mutasjonsdata rapportert. Brannfarlig væske. Farlig brannfare når den utsettes for varme eller flamme. Bruk alkoholskum, CO2, tørre kjemikalier for å bekjempe brann. Ved oppvarming til nedbrytning avgir den røyke og røyk. Se også KETONES. |
Toxicology |
Diacetyl is an intensely yellowish or greenish-yellow mobile liquid. It has a very powerful and diffusive, pungent, buttery odor and typically used in flavor compositions, including butter, milk, cream, and cheese. Diacetyl was found to be mutagenic in Ames test conducted under various different conditions with Salmonella typhimurium strains. For example, diacetyl was mutagenic by TA100 in the absence of S9 metabolic activation at doses up to 40 mM/plate. It was mutagenic in a modified Ames assay in Salmonella typhimurium strains TA100 with and without S9 activation. The acute oral LD50 of diacetyl in guinea pigs was calculated to be 990 mg/kg. The acute oral LD50 of diacetyl in male rats was calculated to be 3400 mg/kg, and in female rats, the LD50 was calculated to be 3000 mg/kg. When male and female rats were administered via gavage a daily dose of 1, 30, 90, or 540 mg/kg/day of diacetyl in water for 90 days, the high-dose produced anemia, decreased weight gain, increased water consumption, increased leukocyte count, and an increase in the relative weights of liver, kidneys, and adrenal and pituitary glands. The data for teratogenicity and carcinogenicity are not available. Although the FDA has affirmed diacetyl GRAS as a flavoring agent, low molecular weight carbonyls, such as formaldehyde, acetaldehyde, and glyoxal have been reported to possess a certain chronic toxicity. |
Carcinogenicity |
Diacetyl was tested
for its ability to induce primary lung tumors in strain A/He mice. The mice
received three IP injections of diacetyl per week for 8 weeks and were killed
24 weeks after the first injection. The total dose of diacetyl given was 1.7
or 8.4 g/kg. The number of lung tumors in diacetyl exposed mice was not
significantly different from the control mice. |
Rensingsmetoder |
Dry biacetyl over anhydrous CaSO4, CaCl2 or MgSO4, then distil it in a vacuum under nitrogen, taking the middle fraction and storing it at Dry-Ice temperature in the dark (to prevent polymerization). [Beilstein 1 IV 3644.] |
Forberedelsesprodukter |
1,4-Butanediol-->Acetonylacetone-->Ursodeoxycholic acid-->2-AMINO-6,7-DIMETHYL-4-HYDROXYPTERIDINE-->Tetramethylpyrazine-->Clethodim-->2-AMINO-6,7-DIMETHYL-4-HYDROXY-5,6,7,8-TETRAHYDROPTERIDINE MONOHYDROCHLORIDE-->DL-Tyrosine-->3-Hydroxy-2-butanone-->2,3-Dimethylpyrazine-->pigment yellow 155-->diacetyl tartaric acid ester ofmono-and diglycerides-->Starter distilIate |
Raw materials |
Etanol-->Sulfuric acid-->Sodium nitrite-->2-Butanone-->Selenium dioxide-->Methyl vinyl ketone-->AROMA-->1-BUTEN-3-YNE-->Orris oil-->LAUREL OIL FROM LAURUS NOBILIS-->Angelica oil-->Polishing compound,yellow |