4-Hydroxy-4-methylpentan-2-on

Bezeichnung:4-Hydroxy-4-methylpentan-2-on

CAS-Nr123-42-2

Englisch Name:Diacetone Alcohol

CBNumberCB9783177

SummenformelC6H12O2

Molgewicht116.16

MOL-Datei123-42-2.mol

Synonyma

4-Hydroxy-4-methylpentan-2-on

4-Hydroxy-2-keto-4-methylpentan

4-Hydroxy-4-methyl-2-pentanon

4-Hydroxy-4-methylpentan-2-on physikalisch-chemischer Eigenschaften

Schmelzpunkt	-42.8 °C
Siedepunkt	166 °C(lit.)
Dichte	0.938 g/mL at 20 °C
Dampfdichte	4 (vs air)
Dampfdruck	<1 mm Hg ( 20 °C)
Brechungsindex	n20/D 1.423(lit.)
Flammpunkt	132 °F
storage temp.	Store below +30°C.
Löslichkeit	Soluble in alcohol, ether (Weast, 1986), and many other solvents, particular ketones such as acetone and 2-butanone.
pka	14.57±0.29(Predicted)
Aggregatzustand	Liquid
Farbe	Clear colorless
Geruch (Odor)	Mild, pleasant.
Explosionsgrenze	1.8-6.9%(V)
Wasserlöslichkeit	MISCIBLE
maximale Wellenlänge (λmax)	249nm(lit.)
Merck	14,2964
BRN	1740440
Specific Activity	25-50 mCi/mmol
Solvent	Ethanol
Concentration	0.1 mCi/ml
Expositionsgrenzwerte	TLV-TWA 240 mg/m³ (50 ppm) (ACGIH); IDLH 2100 ppm (NIOSH).
Dielectric constant	18.2（Ambient）
Stabilität	Stable. Flammable. Incompatible with strong oxidizing agents, amines, ammonia, strong acids, strong bases, alkalies, aluminium.
LogP	-0.09 at 20℃
CAS Datenbank	123-42-2(CAS DataBase Reference)
NIST chemische Informationen	4-Hydroxy-4-methylpentan-2-one(123-42-2)
EPA chemische Informationen	4-Hydroxy-4-methyl-2-pentanone (123-42-2)

Sicherheit

Kennzeichnung gefährlicher	Xi
R-Sätze:	36-R36
S-Sätze:	24/25-S24/25
RIDADR	UN 1148 3/PG 3
OEB	A
OEL	TWA: 50 ppm (240 mg/m3)
WGK Germany	1
RTECS-Nr.	SA9100000
F	9
Selbstentzündungstemperatur	640 °C
TSCA	Yes
HS Code	2914 40 10
HazardClass	3
PackingGroup	III
Giftige Stoffe Daten	123-42-2(Hazardous Substances Data)
Toxizität	LD50 orally in rats: 4.0 g/kg (Smyth)
IDLA	1,800 ppm [10% LEL]

Gefahreninformationscode (GHS)

Diacetone Alcohol Chemische Eigenschaften,Einsatz,Produktion Methoden

ERSCHEINUNGSBILD
FARBLOSE FLüSSIGKEIT MIT CHARAKTERISTISCHEM GERUCH.
CHEMISCHE GEFAHREN
Zersetzung beim Erhitzen, Verbrennen oder bei Kontakt mit Säuren, Basen und Aminen unter Bildung von Aceton und Mesitylalkohol. Reagiert sehr heftig mit Oxidationsmitteln unter Bildung brennbarer/explosionsfähiger Gase (z.B. Wasserstoff, ICSC-Nr. 0001)
ARBEITSPLATZGRENZWERTE
TLV: 50 ppm (als TWA); (ACGIH 2005).
MAK: 20 ppm, 96 mg/m? Spitzenbegrenzung: überschreitungsfaktor I(2); Hautresorption; Schwangerschaft: Gruppe D (DFG 2006).
AUFNAHMEWEGE
Aufnahme in den Körper durch Inhalation der Dämpfe, über die Haut und durch Verschlucken.
INHALATIONSGEFAHREN
Beim Verdampfen bei 20°C tritt eine gesundheitsschädliche Kontamination der Luft nicht oder nur sehr langsam ein.
WIRKUNGEN BEI KURZZEITEXPOSITION
WIRKUNGEN BEI KURZZEITEXPOSITION:
Die Substanz reizt die Augen, die Haut und die Atemwege. Verschlucken kann zur Aufnahme in der Lunge führen; Gefahr der Aspirationspneumonie. Exposition weit oberhalb der Arbeitsplatzgrenzwerte kann zu Bewusstseinstrübung führen.
WIRKUNGEN NACH WIEDERHOLTER ODER LANGZEITEXPOSITION
Die Flüssigkeit entfettet die Haut.
LECKAGE
Zündquellen entfernen. Persönliche Schutzausrüstung: Atemschutzfilter für organische Gase und Dämpfe. Verschüttetes Material mit Absorptionsmittel abdecken. Reste sorgfältig sammeln.
R-Sätze Betriebsanweisung:
R36:Reizt die Augen.
S-Sätze Betriebsanweisung:
S24/25:Berührung mit den Augen und der Haut vermeiden.
Beschreibung
Diacetone alcohol is a colorless liquid with amild, minty odor. Odor threshold = 0.28 ppm. Molecularweight = 116.16; Specific gravity (H2O:1) = 0.94; Boilingpoint = 168℃; Freezing/Melting point = - 43.8℃; Vaporpressure = 1 mmHg at 20℃; Flash point = 64℃; 58℃(acetone free); 64℃ (commercial grade). Explosive limits:LEL = 1.8%; UEL = 6.9%. Hazard Identification (based onNFPA-704 M Rating System): Health 1, Flammability 2,Reactivity 0. Soluble in water.
Chemische Eigenschaften
Diacetone alcohol is a colorless liquid. Mild, mint odor.
Chemische Eigenschaften
colourless liquid
Physikalische Eigenschaften
Clear, watery, flammable liquid with a mild, pleasant, characteristic odor similar to 2-butanone or the pentanones. Experimentally determined detection and recognition odor threshold concentrations were 1.3 mg/m³ (270 ppb_v) and 5.2 mg/m³ (1.1 ppm_v), respectively (Hellman and Small, 1974).
Verwenden
Solvent for pigments, cellulose, resins, oils, fats, and hydrocarbons; hydraulic brake fluid; antifreeze
Verwenden
4-Hydroxy-4-methyl-2-pentanone is used asa solvent for nitrocellulose, cellulose acetate,resins, fats, oils, and waxes; and in hydraulicfluids and antifreeze solutions..
Verwenden
Solvent for cellulose acetate, nitrocellulose, celluloid, fats, oils, waxes, resins. As a preservative in pharmaceutical preparations. In some antifreeze solutions and in hydraulic fluids.
Definition
ChEBI: A beta-hydroxy ketone formed by hydroxylation of 4-methylpentan-2-one at the 4-position. It has been isolated from Achnatherum robustum.
Vorbereitung Methode
4-Hydroxy-4-methyl-2-pentanone is manufactured through the action of barium hydroxide, potassium hydroxide, or calcium hydroxide on acetone. Commercial materials may contain up to 15%acetone.
Synthesis Reference(s)
Organic Syntheses, Coll. Vol. 1, p. 199, 1941
Tetrahedron Letters, 16, p. 4027, 1975 DOI: 10.1016/S0040-4039(00)91227-9
Allgemeine Beschreibung
A clear colorless liquid with a pleasant odor. Flash point below 141°F. Less dense than water. Vapors heavier than air.
Air & Water Reaktionen
Highly flammable. Soluble in water.
Reaktivität anzeigen
Acetyl bromide reacts violently with alcohols or water, [Merck 11th ed., 1989]. Mixtures of alcohols with concentrated sulfuric acid and strong hydrogen peroxide can cause explosions. Example: An explosion will occur if dimethylbenzylcarbinol is added to 90% hydrogen peroxide then acidified with concentrated sulfuric acid. Mixtures of ethyl alcohol with concentrated hydrogen peroxide form powerful explosives. Mixtures of hydrogen peroxide and 1-phenyl-2-methyl propyl alcohol tend to explode if acidified with 70% sulfuric acid, [Chem. Eng. News 45(43):73(1967); J, Org. Chem. 28:1893(1963)]. Alkyl hypochlorites are violently explosive. They are readily obtained by reacting hypochlorous acid and alcohols either in aqueous solution or mixed aqueous-carbon tetrachloride solutions. Chlorine plus alcohols would similarly yield alkyl hypochlorites. They decompose in the cold and explode on exposure to sunlight or heat. Tertiary hypochlorites are less unstable than secondary or primary hypochlorites, [NFPA 491 M, 1991]. Base-catalysed reactions of isocyanates with alcohols should be carried out in inert solvents. Such reactions in the absence of solvents often occur with explosive violence, [Wischmeyer(1969)].
Health Hazard
Vapor is irritating to the mucous membrane of the eye and respiratory tract. Inhalation can cause dizziness, nausea, some anesthesia. Very high concentrations have a narcotic effect. The liquid is not highly irritating to the skin but can cause dermatitis.
Health Hazard
4-Hydroxy-4-methyl-2-pentanone is a mildirritant and a strong narcotic. It can causeirritation in the eyes, nose, throat, and skin.The effect on humans, however, is mild at100 ppm concentration.
Animal experiments indicated that it couldproduce sleep after a period of restlessnessand excitement. The symptoms of its toxicity are a marked decrease in breathing andblood pressure, and relaxation of the muscles. Ingestion of this compound in highdoses can damage corneal tissue and liver.The oral toxicity in rats was very low, witha LD50 value of 4000 mg/kg..
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.
Chemische Reaktivität
Reactivity with Water : No reaction; Reactivity with Common Materials: No reaction; Stability During Transport: Stable; Neutralizing Agents for Acids and Caustics: Not pertinent; Polymerization: Not pertinent; Inhibitor of Polymerization: Not pertinent.
Sicherheitsprofil
Moderately toxic by ingestion and intraperitoneal routes. Mddly toxic by skin contact. Human systemic effects by inhalation: headache, nausea or vomiting, eye and pulmonary changes. A skin, mucous membrane, and severe eye irritant. Can cause anemia and damage to liver and hdneys. Narcotic in high concentration. Flammable liquid when exposed to heat or flame; can react with oxidzing materials. Explosive in the form of vapor when exposed to heat or flame. To fight fire, use alcohol foam, foam, CO2, dry chemical. When heated to decomposition it emits acrid smoke and irritating fumes. See also KETONES.
mögliche Exposition
It is used as a solvent for pigments, cellulose esters; oils and fats. It is used in hydraulic brake fluids and in antifreeze formulations.
Erste Hilfe
If this chemical gets into the eyes, remove anycontact lenses at once and irrigate immediately for at least15 min, occasionally lifting upper and lower lids. Seek medical attention immediately. If this chemical contacts theskin, remove contaminated clothing and wash immediatelywith soap and water. Seek medical attention immediately. Ifthis chemical has been inhaled, remove from exposure,begin rescue breathing (using universal precautions, including resuscitation mask) if breathing has stopped and CPR ifheart action has stopped. Transfer promptly to a medicalfacility. When this chemical has been swallowed, get medical attention. Give large quantities of water and inducevomiting. Do not make an unconscious person vomit.
Carcinogenicity
Occupational exposure to 4-hydroxy-4-methyl-2- pentanone is most likely to be by inhalation and skin contact. It presents a low degree of hazard if good work practices are observed. Appropriate protective clothing and eye protection should be made available as prolonged exposure may defat the skin and cause dermatitis. The occurrence of eye, nose, and throat irritation and a recognizable odor at low concentrations should protect against overexposure to 4-hydroxy-4- methyl-2-pentanone.
Environmental Fate
Biological. Using the BOD technique to measure biodegradation, the mean 5-d BOD value (mM BOD/mM diacetone alcohol) and ThOD were 3.67 and 45.9%, respectively (Vaishnav et al., 1987).
Photolytic. Grosjean (1997) reported a rate constant of 4.0 x 10^-12 cm³/molecule?sec at 298 K for the reaction of OH radicals in the atmosphere. Based on a OH concentration of 1.0 x 106 molecule/cm³, the reported half-life of diacetone alcohol is 2.0 d (Grosjean, 1997).
Lager
Color Code—Red: Flammability Hazard: Store in aflammable liquid storage area or approved cabinet away fromignition sources and corrosive and reactive materials. Prior toworking with this chemical you should be trained on its properhandling and storage. Before entering confined space wherethis chemical may be present, check to make sure that anexplosive concentration does not exist. Diacetone alcohol mustbe stored to avoid contact with strong oxidizers (such as chlorine, bromine, and fluorine) or strong alkalis (such as sodiumhydroxide or potassium hydroxide) since violent reactionsoccur. Store in tightly closed containers in a cool, wellventilated area away from heat. Sources of ignition, such assmoking and open flames, are prohibited where diacetone alcohol is used, handled, or stored in a manner that could create apotential fire or explosion hazard. Metal containers involvingthe transfer of 5 gallons or more of diacetone alcohol shouldbe grounded and bonded. Drums must be equipped with selfclosing valves, pressure vacuum bungs, and flame arresters.
Versand/Shipping
UN1148 Diacetone alcohol, Hazard Class: 3; Labels: 3-Flammable liquid.
läuterung methode
The pentanone loses water when heated. It can be dried with CaSO4, then fractionally distilled under reduced pressure. [Beilstein 1 IV 403.]
Inkompatibilitäten
Vapor may form explosive mixture with air. Incompatible with oxidizers (chlorates, nitrates, perox- ides, permanganates, perchlorates, chlorine, bromine, fluo- rine, etc.); contact may cause fires or explosions. Keep away from alkaline materials, strong bases, strong acids, oxoacids, and epoxides.
Waste disposal
Dissolve or mix the material with a combustible solvent and burn in a chemical incinera- tor equipped with an afterburner and scrubber. All federal, state, and local environmental regulations must be observed.

Diacetone Alcohol Upstream-Materialien And Downstream Produkte

4-Hydroxy-4-methylpentan-2-on Anbieter Lieferant Produzent Hersteller Vertrieb Händler.

123-42-2, Diacetone Alcohol Verwandte Suche:

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