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Methylbernsteinsure

2-Methylsuccinic acid Struktur
498-21-5
CAS-Nr.
498-21-5
Bezeichnung:
Methylbernsteinsure
Englisch Name:
2-Methylsuccinic acid
Synonyma:
DVA;Nsc5276;UNII:H1547KG7UZ;2-Methylsuccinic;PYROTARTARIC ACID;Methyl-Butanediolc;METHYLSUCCINIC ACID;2-Methylsuccinic aci;2-Methylsuccinic acid;methyl-butanedioicaci
CBNumber:
CB9384875
Summenformel:
C5H8O4
Molgewicht:
132.11
MOL-Datei:
498-21-5.mol

Methylbernsteinsure Eigenschaften

Schmelzpunkt:
110-115 °C (lit.)
alpha 
[α]D20 -1~+1° (c=5, C2H5OH)
Siedepunkt:
164.01°C (rough estimate)
Dichte
1.0951 (rough estimate)
Brechungsindex
1.4240 (estimate)
storage temp. 
Sealed in dry,Room Temperature
L?slichkeit
Chloroform (Slightly), DMSO (Sparingly), Methanol (Slightly)
Aggregatzustand
Solid
pka
4.13(at 25℃)
Farbe
White to Off-White
PH
3.62(1 mM solution);3.08(10 mM solution);2.57(100 mM solution)
Wasserl?slichkeit
Soluble in water.
BRN 
1722946
Stabilit?t:
Stable. Combustible. Incompatible with bases, oxidizing agents, reducing agents.
CAS Datenbank
498-21-5(CAS DataBase Reference)
NIST chemische Informationen
Butanedioic acid, methyl-(498-21-5)
EPA chemische Informationen
Butanedioic acid, 2-methyl- (498-21-5)
Sicherheit
  • Risiko- und Sicherheitserkl?rung
  • Gefahreninformationscode (GHS)
Kennzeichnung gef?hrlicher Xi
R-S?tze: 36/37/38
S-S?tze: 26-36
WGK Germany  3
TSCA  Yes
HS Code  29171900
Bildanzeige (GHS) GHS hazard pictograms
Alarmwort Warnung
Gefahrenhinweise
Code Gefahrenhinweise Gefahrenklasse Abteilung Alarmwort Symbol P-Code
H315 Verursacht Hautreizungen. Hautreizung Kategorie 2 Warnung GHS hazard pictogramssrc="/GHS07.jpg" width="20" height="20" /> P264, P280, P302+P352, P321,P332+P313, P362
H319 Verursacht schwere Augenreizung. Schwere Augenreizung Kategorie 2 Warnung GHS hazard pictogramssrc="/GHS07.jpg" width="20" height="20" /> P264, P280, P305+P351+P338,P337+P313P
H335 Kann die Atemwege reizen. Spezifische Zielorgan-Toxizit?t (einmalige Exposition) Kategorie 3 (Atemwegsreizung) Warnung GHS hazard pictogramssrc="/GHS07.jpg" width="20" height="20" />
Sicherheit
P261 Einatmen von Staub vermeiden.
P264 Nach Gebrauch gründlich waschen.
P264 Nach Gebrauch gründlich waschen.
P271 Nur im Freien oder in gut belüfteten R?umen verwenden.
P280 Schutzhandschuhe/Schutzkleidung/Augenschutz tragen.
P302+P352 BEI BERüHRUNG MIT DER HAUT: Mit viel Wasser/... (Hersteller kann, falls zweckm??ig, ein Reinigungsmittel angeben oder, wenn Wasser eindeutig ungeeignet ist, ein alternatives Mittel empfehlen) waschen.
P305+P351+P338 BEI KONTAKT MIT DEN AUGEN: Einige Minuten lang behutsam mit Wasser spülen. Eventuell vorhandene Kontaktlinsen nach M?glichkeit entfernen. Weiter spülen.

Methylbernsteinsure Chemische Eigenschaften,Einsatz,Produktion Methoden

R-S?tze Betriebsanweisung:

R36/37/38:Reizt die Augen, die Atmungsorgane und die Haut.

S-S?tze Betriebsanweisung:

S26:Bei Berührung mit den Augen sofort gründlich mit Wasser abspülen und Arzt konsultieren.
S36:DE: Bei der Arbeit geeignete Schutzkleidung tragen.

Beschreibung

Methylsuccinic acid is a normal metabolite found in human fluids and is an intermediate metabolite in the breakdown of fatty acids. Increased urinary levels of methylsuccinic acid (together with ethylmalonic acid) are the main biochemical measurable features in ethylmalonic encephalopathy.

Chemische Eigenschaften

white to beige crystalline powder

Verwenden

Methylsuccinic acid is used as a flux material and an important dyestuff intermediate. It is also used as an intermediate in medicine and pharmaceuticals.

synthetische

A common method employed for the synthesis of alkanedioic acids involves the oxidation of lactone derivatives. However, in the case of y-butyrolactones, the oxidations have proven particularly challenging due to the stability of the five-membered lactones. A successful approach to this type of oxidative preparation involves the carboxylation of γ-butyrolactone using carbon monoxide and hydrogen fluoride-antimony(V) fluoride superacid containing an excess of antimony(V) fluoride to afford 2-methylsuccinic acid.
Synthesis of 2-Methylsuccinic Acid from y-Butyrolactone
Synthesis of 2-Methylsuccinic Acid from y-Butyrolactone

Definition

ChEBI: 2-methylbutanedioic acid is a dicarboxylic acid that is butanedioic acid substituted at position 2 by a methyl group. It is a conjugate acid of a methylsuccinate.

Origin

2-Methylsuccinic acid is a natural product found in African aloe vera.

Allgemeine Beschreibung

White or yellowish crystals or beige powder.

Air & Water Reaktionen

Water soluble.

Health Hazard

ACUTE/CHRONIC HAZARDS: 2-Methylsuccinic acid may be harmful by inhalation, ingestion or skin absorption. When heated to decomposition it emits toxic fumes of carbon monoxide and carbon dioxide.

Brandgefahr

Flash point data for 2-Methylsuccinic acid are not available; however, 2-Methylsuccinic acid is probably combustible.

Erste Hilfe

Eyes: First check the victim for contact lenses and remove if present. Flush victim's eyes with water or normal saline solution for 20 to 30 minutes while simultaneously calling a hospital or poison control center. Do not put any ointments, oils, or medication in the victim's eyes without specific instructions from a physician. IMMEDIATELY transport the victim after flushing eyes to a hospital even if no symptoms (such as redness or irritation) develop.
Skin: IMMEDIATELY flood affected skin with water while removing and isolating all contaminated clothing. Gently wash all affected skin areas thoroughly with soap and water. If symptoms such as redness or irritation develop, IMMEDIATELY call a physician and be prepared to transport the victim to a hospital for treatment.
Inhalation: IMMEDIATELY leave the contaminated area; take deep breaths of fresh air. If symptoms (such as wheezing, coughing, shortness of breath, or burning in the mouth, throat, or chest) develop, call a physician and be prepared to transport the victim to a hospital. Provide proper respiratory protection to rescuers entering an unknown atmosphere. Whenever possible, Self-Contained Breathing Apparatus (SCBA) should be used; if not available, use a level of protection greater than or equal to that advised under Protective Clothing.
Ingestion: DO NOT INDUCE VOMITING. If the victim is conscious and not convulsing, give 1 or 2 glasses of water to dilute the chemical and IMMEDIATELY call a hospital or poison control center. Be prepared to transport the victim to a hospital if advised by a physician. If the victim is convulsing or unconscious, do not give anything by mouth, ensure that the victim's airway is open and lay the victim on his/her side with the head lower than the body. DO NOT INDUCE VOMITING. IMMEDIATELY transport the victim to a hospital.

l?uterung methode

Crystallise the acid from water. [Beilstein 2 IV 1948.]

Methylbernsteinsure Upstream-Materialien And Downstream Produkte

Upstream-Materialien

Downstream Produkte


Methylbernsteinsure Anbieter Lieferant Produzent Hersteller Vertrieb H?ndler.

Global( 295)Lieferanten
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498-21-5(Methylbernsteinsure)Verwandte Suche:


  • 1,2-Propanedicarboxylic acid
  • 2-Methylbutanedioic acid
  • 2-Methylbutanedioicacid
  • 2-Methylsuccinic acid
  • (plus-minus)-methylsuccinic acid
  • Methylsuccinicacid,99%
  • Methyl-Butanedioic acid Methylsuccinic acid Pyrotartaric acid
  • ,2-Propanedicarboxylic acid
  • 2-Methylbutane-1,4-dioic acid
  • DL-Methylsuccinic acid,99%
  • Nsc5276
  • 2-Methylsuccinic aci
  • Methyl-Butanediolc
  • Methylsuccinic acid 99%
  • Butanedioicacid,methyl-
  • Methylbutanedioic acid
  • methyl-butanedioicaci
  • methyl-Butanedioicacid
  • Propane-1,2-dicarboxylicacid
  • Succinic acid, methyl-
  • PYROTARTARIC ACID
  • (+/-)-METHYLSUCCINIC ACID
  • METHYLSUCCINIC ACID
  • MethylsuccinicAcid>
  • UNII:H1547KG7UZ
  • 2-Methylsuccinic
  • DVA
  • (+/-)-METHYLSUCCINIC ACID
  • 498-21-5
  • HOOCCH2CHCH3COOH
  • HO2CCH3CHCH2COOH
  • HOOCCH3CHCH2CO2H
  • HOOCCDCD3CD2COOH
  • HO2CCH2CHCH3CO2H
  • Carbonyl Compounds
  • C1 to C5
  • Building Blocks
  • Carboxylic Acids
  • Organic Building Blocks
  • C1 to C5
  • Carbonyl Compounds
  • Carboxylic Acids
  • Miscellaneous
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