2-Butanone peroxide Struktur

2-Butanon-peroxid

Bezeichnung:2-Butanon-peroxid

CAS-Nr1338-23-4

Englisch Name:2-Butanone peroxide

CBNumberCB6317379

SummenformelC8H18O6

Molgewicht210.22

MOL-Datei1338-23-4.mol

Synonyma

2-Butanon, Peroxid

2-Butanon-peroxid

2-Butanonperoxid

2-Butanon-peroxid physikalisch-chemischer Eigenschaften

Schmelzpunkt	110°C
Siedepunkt	284 °C
Dichte	1.053 g/mL at 20 °C(lit.)
Dampfdruck	0.644-73.6Pa at 25℃
Brechungsindex	n20/D 1.455
Flammpunkt	190 °F
storage temp.	2-8°C
Aggregatzustand	Liquid
Wasserlöslichkeit	0.1-0.5 g/100 mL at 22 ºC
BRN	1759757
Expositionsgrenzwerte	ACGIH (1986) recommends a ceiling limit of 1.5 mg/m³ (0.2 ppm). This concentration in air is based on its irritant properties.
Stabilität	May react violently or explode if heated. Reacts violently with combustibles and organic material. Incompatible with flammables, strong oxidizing agents, strong reducing agents, promoters such as Cobalt compounds, brass, mild steel, aluminum alloys, natural and synthetic rubbers and chemical accelerators, heavy metals, acids and bases.
LogP	0.3 at 25℃
CAS Datenbank	1338-23-4(CAS DataBase Reference)
EPA chemische Informationen	Methyl ethyl ketone peroxide (1338-23-4)

Sicherheit

Kennzeichnung gefährlicher	O,Xn,C,T,N
R-Sätze:	8-22-38-41-43-34-7-35-23-9-62-50/53-61
S-Sätze:	17-26-36/37/39-45-14-53-3/7-47-7-61
RIDADR	UN 3105 5.2
OEL	Ceiling: 0.2 ppm (1.5 mg/m3)
WGK Germany	1
HazardClass	5.2
PackingGroup	II
Giftige Stoffe Daten	1338-23-4(Hazardous Substances Data)

Gefahreninformationscode (GHS)

2-Butanone peroxide Chemische Eigenschaften,Einsatz,Produktion Methoden

ERSCHEINUNGSBILD
FARBLOSE FLüSSIGKEIT MIT STECHENDEM GERUCH.
CHEMISCHE GEFAHREN
Erhitzen kann zu sehr heftiger Verbrennung oder Explosion führen. Beim Verbrennen Bildung giftiger und ätzender Gase. Starkes Oxidationsmittel. Reagiert sehr heftig mit brennbaren und reduzierenden Stoffen, Aminen, Metallen, starken Säuren und starken Basen unter Feuer- und Explosionsgefahr.
ARBEITSPLATZGRENZWERTE
TLV: 0.2 ppm (als STEL, ceiling) (ACGIH 2005).
MAK nicht festgelegt (DFG 2005).
AUFNAHMEWEGE
Aufnahme in den Körper durch Inhalation und durch Verschlucken.
INHALATIONSGEFAHREN
Eine gesundheitsschädliche Partikelkonzentration in der Luft kann beim Dispergieren schnell erreicht werden.
WIRKUNGEN BEI KURZZEITEXPOSITION
WIRKUNGEN BEI KURZZEITEXPOSITION:
Die Substanz verätzt die Augen, die Haut und die Atemwege. ätzend beim Verschlucken.
LECKAGE
Chemikalienschutzanzug mit umgebungsluftunabhängigem Atemschutzgerät. Ausgelaufene Flüssigkeit möglichst in abdichtbaren Kunststoffbehältern sammeln. NICHT mit Sägemehl oder anderen brennbaren Absorptionsmitteln binden.
R-Sätze Betriebsanweisung:
R8:Feuergefahr bei Berührung mit brennbaren Stoffen.
R22:Gesundheitsschädlich beim Verschlucken.
R38:Reizt die Haut.
R41:Gefahr ernster Augenschäden.
R43:Sensibilisierung durch Hautkontakt möglich.
R34:Verursacht Verätzungen.
R7:Kann Brand verursachen.
R35:Verursacht schwere Verätzungen.
R23:Giftig beim Einatmen.
R9:Explosionsgefahr bei Mischung mit brennbaren Stoffen.
S-Sätze Betriebsanweisung:
S17:Von brennbaren Stoffen fernhalten.
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).
S14:Von . . . fernhalten (inkompatible Substanzen sind vom Hersteller anzugeben).
S53:Exposition vermeiden - vor Gebrauch besondere Anweisungen einholen.
S3/7:Behälter dicht geschlossen halten und an einem kühlen Ort aufbewahren.
S47:Nicht bei Temperaturen über . . . °C aufbewahren (vom Hersteller anzugeben).
S7:Behälter dicht geschlossen halten.
Beschreibung
MEKP, an organic peroxide, is a colorlessliquid. Molecular weight= 176.24; Specific gravity(H2O:1)= 1.12 at15℃; Boiling point = (decomposes)117.89C; FreezingMelting point = about, 60℃. Flashpoint= 52-93℃ (oc)60%MEKP.HazardIdentification (based on NFPA-704 M Rating System):Health 3, Flammability 2, Reactivity 2. Insoluble in water.
Chemische Eigenschaften
Methyl ethyl ketone peroxide (2-Butanone peroxide) is an organic peroxide with the formula [(CH3)(C2H5)C(O2H)]2O2. MEKP is a colorless oily liquid. It is widely used in vulcanization (crosslinking) of polymers.
Verwenden
2-Butanone peroxide is used to initiate thepolymerization of ethylene, styrene, vinylchloride, and other monomers; and for roomtemperature curing of polyester resins. It can also used as a crosslinking agent and catalyst in the production of other polymers. Reactive free radical-generating chemical used as a curing agent for unsaturated polyester resins; hardening agent for fiberglassreinforced plastics; manufacture of acrylic resin.
Application
2-Butanone peroxide can be used as the following reactants:
Studies of the adiabatic runaway reaction of Me Et Ketone peroxide.
Quantitation of metal ions in archaeological glass via abrasive stripping square-wave voltammetry.
Imaging of hydrogen peroxide and hydrogen peroxide-scavenging substances by photon emission.
Synthesis of oligonucleotides via phosphoramidite method.
Oxidation of nucleoside phosphites into phosphates.
Comparing the relative effectiveness of human plasma glutathione peroxidase as a catalyst for reduction of hydroperoxidases.
2-Butanone peroxide can also be used as a direct electrochemical catalyst analyte for immobilized Hb in ethanol-water mixtures.
synthetische
2-Butanone peroxide is obtained by reacting methyl ethyl ketone with hydrogen peroxide (hydrogen peroxide) in the presence of sulfuric acid. After oxidation, neutralization, separation, dehydration, standing, filtration, and finally adding the solubilizing agent to obtain the finished product.
Allgemeine Beschreibung
Colorless liquid. Strong irritant to skin and tissue. Used as an initiator for room temperature cure of unsaturated polyester resins.
Reaktivität anzeigen
2-Butanone peroxide is a strong oxidizing agent. May be ignited by heat, sparks or flame and undergoes self-accelerating decomposition. Explosive decomposition occurs at 230° F. Sensitive to sunlight. Ignition and/or explosion may occur if mixed with readily oxidizable materials. Reacts with combustible materials such as wood, cloth or organic materials, with chlorine, and with metals (iron, copper and their alloys and aluminum and its alloys). Incompatible with strong oxidizing agents, strong reducing agents, natural rubbers, synthetic rubbers and chemical accelerators. Incompatible with heavy metals, acids and bases.
Hazard
Fire risk in contact with organic materials.Strong irritant to skin and tissue. Liver and kidneydamage.
Health Hazard
Extremely destructive to tissue of the mucous membranes, upper respiratory tract, eyes, and skin. Symptoms of exposure include burning sensation, coughing, wheezing, laryngitis, shortness of breath, headache, nausea, and vomiting.
Health Hazard
MEK peroxide (2-Butanone peroxide) is a strong skin and eye irritantwith moderate acute and subchronic toxicity.Its toxicity is greater than di-t-butylperoxide and benzoyl peroxide. Inhalationof its vapors can cause injury to lungs withsymptoms of gross hemorrhages and hyperemia(Floyd and Stockinger 1958). Exposureto high concentrations may have damagingeffects on the liver and kidney. In humans,ingestion of 30–40 g can be toxic, whichmay cause gastrointestinal pain, nausea, andvomiting.
LC50 value, inhalation (mice): 170 ppm/4 h
LD₅₀ value, intraperitoneal (rats): 65 mg/kg
LD₅₀ value, oral (mice): 470 mg/kg
Its carcinogenicity is not yet fully established.It is reported (NIOSH 1986) to causetumor in mice.
Brandgefahr
Methyl Ethyl Ketone Peroxide (2-Butanone peroxide) is a combustible and reactive liquid that may burn slowly at first, and after heating can burn violently and explosively.
reaction suitability
reagent type: oxidant
Sicherheitsprofil
Poison by intraperitoneal route. Moderately toxic by ingestion and inhalation. Human systemic effects by ingestion: changes in structure or function of esophagus, nausea or vomiting, other gastrointestinal effects. A moderate skin and eye irritant. Questionable carcinogen with experimental tumorigenic data. A shock-sensitive explosive. When heated to decomposition it emits acrid smoke and irritating fumes.
mögliche Exposition
Tumorigen,Human Data; Primary Irritant. MEKP is used as a curingagent for thermosetting polyester resins and as a crosslinking agent and catalyst in the production of other polymers.
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.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.
Lager
MEK peroxide is diluted in a solvent or dispersedin a plasticizer, which greatly reducesits shock sensitivity. It is stored in a refrigeratorin a well-ventilated area and wellseparated from other chemicals. Peroxidewith an active oxygen content >9% maynot be shipped. Diluted material is shippedin metal drums with polyethylene liners orpolyethylene-lined paper bags in woodenboxes.
Versand/Shipping
UN3105 Organic peroxide type D, liquid, Hazard Class: 5.2; Labels: 5.2-Organic peroxide, Technical Name Required.
Inkompatibilitäten
Forms explosive mixture with air (flash point varies). MEKP (2-Butanone peroxide) may exist in several different structures; decomposition temperatures may vary. Pure substance is shock-sensitive. Explosive decomposition above 176F/80C (also reported @ 230F/110C). Keep away from sources of ignition, heat, sunlight. A strong oxidizer. Violent reaction with strong acids; strong bases; reducing agents; combustible substances, organic materials; chemical accelerants; oxides of heavy metals; salts, trace contaminants; amines. May accumulate static electrical charges, and cause ignition of its vapors. Commercial product is diluted with 40% dimethyl phthalate, cyclohexane peroxide; or diallyl phthalate to reduce sensitivity to shock.
Filter für giftige stoffe
The initial threshold screening level (ITSL) for Methyl Ethyl Ketone Peroxide is 15 μg/m3 based on 8-hour averaging time.
Waste disposal
Consult with environmental regulatory agencies for guidance on acceptable disposal practices. Generators of waste containing this contaminant (≥100 kg/mo) must conform to EPA regulations governing storage, transportation, treatment, and waste disposal. MEKP may be destroyed by adding 20% NaOH solution slowly in a quantity about 10 times the weight of MEKP. Incineration is recommended if NaOH treatment is not used

2-Butanone peroxide Upstream-Materialien And Downstream Produkte

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