Glyoxal

Bezeichnung:Glyoxal

CAS-Nr107-22-2

Englisch Name:Glyoxal

CBNumberCB1280241

SummenformelC2H2O2

Molgewicht58.04

MOL-Datei107-22-2.mol

Synonyma

Glyoxal

1,2-Ethandion

Diformyl

Glyoxal physikalisch-chemischer Eigenschaften

Schmelzpunkt	-14 °C
Siedepunkt	104 °C
Dichte	1.265 g/mL at 25 °C
Dampfdichte	>1 (vs air)
Dampfdruck	18 mm Hg ( 20 °C)
Brechungsindex	n20/D 1.409
Flammpunkt	104°C
storage temp.	2-8°C
Löslichkeit	water: soluble(lit.)
Aggregatzustand	Liquid
Farbe	Clear colorless to yellow
Geruch (Odor)	yel. crystals or lt. yel. liq., mild odor
Wasserlöslichkeit	miscible
Merck	14,4509
BRN	1732463
Expositionsgrenzwerte	ACGIH: TWA 0.1 mg/m3
Stabilität	Stability Combustible. Incompatible with strong oxidizing agents. Strong reducing agent. May polyermize exothermically. Incompatible with air, water, oxygen, peroxides, amides, amines, hydroxy-containing materials, nitric acid, aldehydes. Corrodes many metals.
InChIKey	LEQAOMBKQFMDFZ-UHFFFAOYSA-N
LogP	-1.15 at 20℃
CAS Datenbank	107-22-2(CAS DataBase Reference)
NIST chemische Informationen	Ethanedial(107-22-2)
EPA chemische Informationen	Glyoxal (107-22-2)

Sicherheit

Kennzeichnung gefährlicher	Xn
R-Sätze:	20-36/38-43-68
S-Sätze:	36/37
RIDADR	UN 1760
WGK Germany	1
RTECS-Nr.	MD2700000
Selbstentzündungstemperatur	545 °F
TSCA	Yes
HS Code	29121900
Giftige Stoffe Daten	107-22-2(Hazardous Substances Data)
Toxizität	LD50 in rats, guinea pigs (mg/kg): 2020, 760 orally (Smyth)

Gefahreninformationscode (GHS)

Glyoxal Chemische Eigenschaften,Einsatz,Produktion Methoden

ERSCHEINUNGSBILD
FARBLOSEBIS BLASSGELBE FLüSSIGKEIT.
CHEMISCHE GEFAHREN
Schwache Säure in wässriger Lösung.
ARBEITSPLATZGRENZWERTE
TLV: (Einatembares Aerosol und Dampf) 0.1 mg/m?(als TWA); Krebskategorie A4 (nicht klassifizierbar als krebserzeugend für den Menschen); Sensibilisierung; (ACGIH 2005).
MAK: Hautresorption; Sensibilisierung der Haut; Krebserzeugend Kategorie 3B; (DFG 2005).
AUFNAHMEWEGE
Aufnahme in den Körper durch Inhalation der Dämpfe oder des Aerosols und durch Verschlucken.
INHALATIONSGEFAHREN
Beim Verdampfen bei 20°C kann sehr schnell eine gesundheitsschädliche Kontamination der Luft eintreten.
WIRKUNGEN BEI KURZZEITEXPOSITION
WIRKUNGEN BEI KURZZEITEXPOSITION:
Die Substanz reizt die Augen und die Haut.
WIRKUNGEN NACH WIEDERHOLTER ODER LANGZEITEXPOSITION
Wiederholter oder andauernder Kontakt kann zu Hautsensibilisierung führen.
LECKAGE
Ausgelaufene Flüssigkeit möglichst in abdichtbaren Behältern sammeln. Gesichtsschutz benutzen. Persönliche Schutzausrüstung: Atemschutzfilter für organische Gase und Dämpfe.
R-Sätze Betriebsanweisung:
R20:Gesundheitsschädlich beim Einatmen.
R36/38:Reizt die Augen und die Haut.
R43:Sensibilisierung durch Hautkontakt möglich.
R68:Irreversibler Schaden möglich.
S-Sätze Betriebsanweisung:
S36/37:Bei der Arbeit geeignete Schutzhandschuhe und Schutzkleidung tragen.
Chemische Eigenschaften
colourless or light yellow liquid
Verwenden
ermanent-press fabrics; dimensional stabilization of rayon and other fibers. Insolubilizing agent for compounds containing polyhydroxyl groups (polyvinyl alcohol, starch, and cellulosic materials); insolubilizing of proteins (casein, gelatin, and animal glue); embalming fluids; leather tanning; paper coatings with hydroxyethylcellulose; reducing agent in dyeing textiles.
Verwenden
Glyoxal is used to prepare 4,5-dihydroxy-2-imidazolidinone by condensation with urea. It finds application in leather tanning process, textile finishes and paper coatings. It is an important building block in the synthesis of imidazoles. It acts as a solubilizer and cross-linking agent in polymer chemistry. Further, it is used as a fixative for histology to preserve cells in order to examine under a microscope.
Verwenden
Glyoxal is used in the production of textilesand glues and in organic synthesis.
Definition
ChEBI: Glyoxal is the dialdehyde that is the smallest possible and which consists of ethane having oxo groups on both carbons. It has a role as a pesticide, an agrochemical, an allergen and a plant growth regulator.
Allgemeine Beschreibung
Yellow crystals melting at15°C. Hence often encountered as a light yellow liquid with a weak sour odor. Vapor has a green color and burns with a violet flame.
Air & Water Reaktionen
Mixtures with air may explode. Polymerizes quickly on standing, or on contact with a trace of water (possibly a violent reaction), or when dissolved in solvents containing water, [Merck, 502(1968)]. Soluble in water. An aqueous solution contains mono molecular Glyoxal. [Hawley]
Reaktivität anzeigen
Glyoxal reacts vigorously with strong oxidizing agents such as nitric acid. Polymerizes rapidly even at low temperature if anhydrous [Noller]. Aqueous solutions are more stable but also polymerize on standing. Reacts with itself in the presence of base to give glyconates. Undergoes addition and condensation reactions that may be exothermic with amines, amides, aldehydes, and hydroxide-containing materials. Mixing in equal molar portions with any of the following substances in a closed container caused the temperature and pressure to increase: chlorosulfonic acid, oleum, ethyleneimine, nitric acid, sodium hydroxide [NFPA 1991].
Hazard
Mixture of vapor and air may explode. Questionable carcinogen.
Health Hazard
Glyoxal is a skin and eye irritant; the effectmay be mild to severe. Its vapors are irritatingto the skin and respiratory tract. Anamount of 1.8 mg caused severe irritation inrabbits’ eyes. Glyoxal exhibited low toxicityin test subjects. Ingestion may cause somnolenceand gastrointestinal pain.
LD50 value, oral (guinea pigs): 760 mg/kg.
Health Hazard
Inhalation causes some irritation of nose and,40% solution throat. Contact with liquid,40% solution irritates eyes and causes mild irritation of skin; stains skin yellow. (No information available on symptoms of ingestion.)
Brandgefahr
Behavior in Fire: Heat may cause polymerization to a combustible, viscous material.
Flammability and Explosibility
Not classified
Sicherheitsprofil
Low toxicity by SYN: AEROTEX GLYOXAL 40 ingestion and skin contact. A skin irritant. A powerful reducing agent. May explode on contact with air. Polymerizes violently on contact with water. During storage it may spontaneously polymerize and ignite. Reacts violently with chlorosulfonic acid, ethylene imine, HNO3, oleum, NaOH, can cause violent reactions. Can explode during manufacture. When heated to decomposition it emits acrid smoke and irritating fumes. See also ALDEHYDES.
Waste disposal
Glyoxal is mixed with a combustible solventand burned in a chemical incineratorequipped with an afterburner and scrubber.

Glyoxal Upstream-Materialien And Downstream Produkte

Glyoxal Anbieter Lieferant Produzent Hersteller Vertrieb Händler.

107-22-2, Glyoxal Verwandte Suche:

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