一二三四区视频,亚洲少妇熟女色,日本久热无码视频网,欧美国产日韩大尺度,亚洲a视频,久久少妇一区二区,日韩999无码视频,刺激久久久久久久,啊啊啊啊不要啊在线

Methylbernsteinsure

2-Methylsuccinic acid Struktur
498-21-5
CAS-Nr.
498-21-5
Bezeichnung:
Methylbernsteinsure
Englisch Name:
2-Methylsuccinic acid
Synonyma:
METHYLSUCCINIC ACID;DVA;Nsc5276;UNII:H1547KG7UZ;2-Methylsuccinic;PYROTARTARIC ACID;Methyl-Butanediolc;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.
InChI
1S/C5H8O4/c1-3(5(8)9)2-4(6)7/h3H,2H2,1H3,(H,6,7)(H,8,9)
InChIKey
WXUAQHNMJWJLTG-UHFFFAOYSA-N
SMILES
CC(CC(O)=O)C(O)=O
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  TSCA listed
HS Code  29171900
Speicherklasse 11 - Combustible Solids
Hazard Classifications Eye Irrit. 2
Skin Irrit. 2
STOT SE 3
Bildanzeige (GHS) Exclamation Mark (GHS07)
Alarmwort Warnung
Gefahrenhinweise
Code Gefahrenhinweise Gefahrenklasse Abteilung Alarmwort Symbol P-Code
H315 Verursacht Hautreizungen. Hautreizung Kategorie 2 Warnung P264, P280, P302+P352, P321,P332+P313, P362
H319 Verursacht schwere Augenreizung. Schwere Augenreizung Kategorie 2 Warnung P264, P280, P305+P351+P338,P337+P313P
H335 Kann die Atemwege reizen. Spezifische Zielorgan-Toxizit?t (einmalige Exposition) Kategorie 3 (Atemwegsreizung) Warnung
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( 319)Lieferanten
Firmenname Telefon E-Mail Land Produktkatalog Edge Rate
Beijing Risun Science and Technology Limited
+8615066214473
zhaoyanlu@risun.com China 12 58
Anhuyan (Hainan) Biotechnology Co., LTD
+8618163349544
mollylucking@foxmail.com China 3000 58
Shanghai Bojing Chemical Co.,Ltd.
+86-86-02137122233 +8613795318958
bj1@bj-chem.com China 299 55
Shanghai Zheyan Biotech Co., Ltd.
18017610038
zheyansh@163.com CHINA 3619 58
career henan chemical co
+86-0371-86658258 +8613203830695
sales@coreychem.com China 29815 58
Accela ChemBio Inc.
+1-858-6993322
info@accelachem.com United States 21193 58
Xiamen AmoyChem Co., Ltd
+86-86-5926051114 +8615060885618
sales@amoychem.com China 6366 58
Nanjing jinheyou Trading Co., Ltd.
15705188088
admin@jheyou.com CHINA 1268 58
CONIER CHEM AND PHARMA LIMITED
+8618523575427
sales@conier.com China 49979 58
Neostar United (Changzhou) Industrial Co., Ltd.
+86-0519-85551759 +8613506123987
marketing1@neostarunited.com China 8828 58

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
  • MethylsuccinicAcid>
  • UNII:H1547KG7UZ
  • 2-Methylsuccinic
  • 2-Methylsuccinic acid, 10 mM in DMSO
  • 2-Methylsuccinic acid (Standard)
  • 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
Copyright 2019 ? ChemicalBook. All rights reserved
长治市| 临邑县| 怀柔区| 兴山县| 崇明县| 天祝| 鲁山县| 双城市| 筠连县| 上高县| 基隆市| 晋中市| 湖州市| 曲阜市| 嘉荫县| 抚远县| 五大连池市| 大方县| 内江市| 筠连县| 咸丰县| 宜都市| 建宁县| 梁山县| 霍州市| 崇文区| 九寨沟县| 伽师县| 泸州市| 临沭县| 公主岭市| 容城县| 普安县| 台安县| 山丹县| 盐池县| 濮阳县| 正安县| 任丘市| 南召县| 汕尾市|