天堂网亚洲,天天操天天搞,91视频高清,菠萝蜜视频在线观看入口,美女视频性感美女视频,95丝袜美女视频国产,超高清美女视频图片

Polyethylene Glycol

Polyethylene Glycol Struktur
25322-68-3
CAS-Nr.
25322-68-3
Englisch Name:
Polyethylene Glycol
Synonyma:
PEG;PEO;POLYETHYLENE GLYCOL;PEG 400;POLY(ETHYLENE OXIDE);Macrogol;PEG 6000;PEG-8;PEG-12;PEG-20
CBNumber:
CB6145866
Summenformel:
(C2H4O)nH2O
Molgewicht:
0
MOL-Datei:
25322-68-3.mol

Polyethylene Glycol Eigenschaften

Schmelzpunkt:
64-66 °C
Siedepunkt:
>250°C
Tg
-67
Dichte
1.27 g/mL at 25 °C
Dampfdichte
>1 (vs air)
Dampfdruck
<0.01 mm Hg ( 20 °C)
Brechungsindex
n20/D 1.469
Flammpunkt:
270 °C
storage temp. 
2-8°C
L?slichkeit
H2O: 50 mg/mL, clear, colorless
Aggregatzustand
waxy solid
Farbe
White to very pale yellow
Wichte
1.128
PH
5.5-7.0 (25℃, 50mg/mL in H2O)
Wasserl?slichkeit
Soluble in water.
Sensitive 
Hygroscopic
maximale Wellenl?nge (λmax)
λ: 260 nm Amax: 0.6
λ: 280 nm Amax: 0.3
Merck 
14,7568
Stabilit?t:
Stable. Incompatible with strong oxidizing agents.
LogP
-0.698 at 25℃
NIST chemische Informationen
Polyethylene glycol(25322-68-3)
EPA chemische Informationen
Polyethylene glycol (25322-68-3)
Sicherheit
  • Risiko- und Sicherheitserkl?rung
  • Gefahreninformationscode (GHS)
Kennzeichnung gef?hrlicher Xi,T
R-S?tze: 36/38-52/53-33-23/24/25
S-S?tze: 26-36-24/25-61-45-36/37
WGK Germany  3
RTECS-Nr. TQ4110000
3-9
Selbstentzündungstemperatur 581 °F
Hazard Note  Harmful
TSCA  Yes
HS Code  39072011
Giftige Stoffe Daten 25322-68-3(Hazardous Substances Data)
Toxizit?t LD50 orally in Rabbit: 28000 mg/kg LD50 dermal Rabbit > 20000 mg/kg
Bildanzeige (GHS) GHS hazard pictogramsGHS hazard pictogramsGHS hazard pictograms
Alarmwort Achtung
Gefahrenhinweise
Code Gefahrenhinweise Gefahrenklasse Abteilung Alarmwort Symbol P-Code
H302 Gesundheitssch?dlich bei Verschlucken. Akute Toxizit?t oral Kategorie 4 Warnung GHS hazard pictogramssrc="/GHS07.jpg" width="20" height="20" /> P264, P270, P301+P312, P330, P501
H311 Giftig bei Hautkontakt. Akute Toxizit?t dermal Kategorie 3 Achtung GHS hazard pictogramssrc="/GHS06.jpg" width="20" height="20" /> P280, P302+P352, P312, P322, P361,P363, P405, P501
H373 Kann die Organe sch?digen bei l?ngerer oder wiederholter Exposition. Spezifische Zielorgan-Toxizit?t (wiederholte Exposition) Kategorie 2 Warnung P260, P314, P501
H411 Giftig für Wasserorganismen, mit langfristiger Wirkung. Langfristig (chronisch) gew?ssergef?hrdend Kategorie 2
Sicherheit
P273 Freisetzung in die Umwelt vermeiden.
P280 Schutzhandschuhe/Schutzkleidung/Augenschutz tragen.
P391 Verschüttete Mengen aufnehmen.
P501 Inhalt/Beh?lter ... (Entsorgungsvorschriften vom Hersteller anzugeben) zuführen.

Polyethylene Glycol Chemische Eigenschaften,Einsatz,Produktion Methoden

ERSCHEINUNGSBILD

FARBLOSE, VISKOSE, LEICHT HYGROSKOPISCHE FLüSSIGKEIT.

ARBEITSPLATZGRENZWERTE

TLV nicht festgelegt (ACGIH 2005).
MAK: (Einatembare Fraktion) 1000 mg/m? Spitzenbegrenzung: überschreitungsfaktor II(8); Schwangerschaft: Gruppe C; (DFG 2005).

INHALATIONSGEFAHREN

Eine bel?stigende Partikelkonzentration in der Luft kann beim Dispergieren schnell erreicht werden.

LECKAGE

Ausgelaufene Flüssigkeit in abgedeckten Beh?ltern sammeln. Verschüttete Flüssigkeit mit viel Wasser wegspülen.

R-S?tze Betriebsanweisung:

R36/38:Reizt die Augen 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.
S24/25:Berührung mit den Augen und der Haut vermeiden.

Beschreibung

Polyethylene glycols are a family of linear polymers formed by a base-catalyzed condensation reaction with repeating ethylene oxide units being added to ethylene. The molecular formula is (C2H4O)multH2O where mult denotes the average number of oxyethylene groups. The molecular weight can range from 200 to several million corresponding to the number of oxyethylene groups. The higher-molecular-weight materials (100 000 to 5 000 000) are also referred to as polyethylene oxides. The average molecular weight of any specific polyethylene glycol product falls within quite narrow limits (°5%). The number of ethylene oxide units or their approximate molecular weight (e.g., PEG-4 or PEG-200) commonly designates the nomenclature of specific polyethylene glycols. Polyethylene glycols with amolecular weight less than 600 are liquid, whereas those of molecular weight 1000 and above are solid. These materials are nonvolatile, water-soluble, tasteless, and odorless. They are miscible with water, alcohols, esters, ketones, aromatic solvents, and chlorinated hydrocarbons, but immiscible with alkanes, paraffins, waxes, and ethers.

Chemische Eigenschaften

White waxy crystalline flakes

Verwenden

Used in conjunction with carbon black to form a conductive composite.1 Polymer nanospheres of poly(ethylene glycol) were used for drug delivery.2

Definition

Any of several condensa-tion polymers of ethylene glycol with thegeneral formula HOCH2(CH2OCH2)nCH2OH orH(OCH2CH2)nOH. Average molecular weightsrange from 200 to 6000. Properties vary with molec-ular weight.

Vorbereitung Methode

Polyethylene glycol polymers are formed by the reaction of ethylene oxide and water under pressure in the presence of a catalyst.

Indications

Polyethylene glycol (Miralax) is another osmotic laxative that is colorless and tasteless once it is mixed.

Allgemeine Beschreibung

Clear colorless viscous liquid.

Air & Water Reaktionen

Water soluble.

Reaktivit?t anzeigen

Poly(ethylene glycol) is heat-stable and inert to many chemical agents; Poly(ethylene glycol) will not hydrolyze or deteriorate under normal conditions. Poly(ethylene glycol) has a solvent action on some plastics.

Brandgefahr

Poly(ethylene glycol) is combustible.

Sicherheitsprofil

When heated to decomposition it emits acrid smoke and irritating fumes.

Environmental Fate

Like other polymeric substances, polyethylene glycols are not readily biodegradable, with reported 5-day biochemical oxygen demand (BOD5) of 0–1%. However, owing to their hydrophilicity, they have a low potential to bioaccumulate.

Lager

Polyethylene glycols are chemically stable in air and in solution, although grades with a molecular weight less than 2000 are hygroscopic. Polyethylene glycols do not support microbial growth, and they do not become rancid.
Polyethylene glycols and aqueous polyethylene glycol solutions can be sterilized by autoclaving, filtration, or gamma irradiation.
Sterilization of solid grades by dry heat at 150℃ for 1 hour may induce oxidation, darkening, and the formation of acidic degradation products. Ideally, sterilization should be carried out in an inert atmosphere. Oxidation of polyethylene glycols may also be inhibited by the inclusion of a suitable antioxidant.
If heated tanks are used to maintain normally solid polyethylene glycols in a molten state, care must be taken to avoid contamination with iron, which can lead to discoloration. The temperature must be kept to the minimum necessary to ensure fluidity; oxidation may occur if polyethylene glycols are exposed for long periods to temperatures exceeding 50℃. However, storage under nitrogen reduces the possibility of oxidation.
Polyethylene glycols should be stored in well-closed containers in a cool, dry place. Stainless steel, aluminum, glass, or lined steel containers are preferred for the storage of liquid grades.

Inkompatibilit?ten

The chemical reactivity of polyethylene glycols is mainly confined to the two terminal hydroxyl groups, which can be either esterified or etherified. However, all grades can exhibit some oxidizing activity owing to the presence of peroxide impurities and secondary products formed by autoxidation.
Liquid and solid polyethylene glycol grades may be incompatible with some coloring agents.
The antibacterial activity of certain antibiotics is reduced in polyethylene glycol bases, particularly that of penicillin and bacitracin. The preservative efficacy of the parabens may also be impaired owing to binding with polyethylene glycols.
Physical effects caused by polyethylene glycol bases include softening and liquefaction in mixtures with phenol, tannic acid, and salicylic acid. Discoloration of sulfonamides and dithranol can also occur, and sorbitol may be precipitated from mixtures. Plastics, such as polyethylene, phenolformaldehyde, polyvinyl chloride, and cellulose-ester membranes (in filters) may be softened or dissolved by polyethylene glycols. Migration of polyethylene glycol can occur from tablet film coatings, leading to interaction with core components.

Regulatory Status

Included in the FDA Inactive Ingredients Database (dental preparations; IM and IV injections; ophthalmic preparations; oral capsules, solutions, syrups, and tablets; rectal, topical, and vaginal preparations). Included in nonparenteral medicines licensed in the UK. Included in the Canadian List of Acceptable Non-medicinal Ingredients.

Polyethylene Glycol Upstream-Materialien And Downstream Produkte

Upstream-Materialien

Downstream Produkte


Polyethylene Glycol Anbieter Lieferant Produzent Hersteller Vertrieb H?ndler.

Global( 1134)Lieferanten
Firmenname Telefon E-Mail Land Produktkatalog Edge Rate
ChemFine International Co.,Ltd.
+86-510-82753588 +86-13806194144
info@chemfineinternational.com China 300 58
Hefei TNJ Chemical Industry Co.,Ltd.
+86-0551-65418671 +8618949823763
sales@tnjchem.com China 34563 58
Biopole Pharmatech Co., Ltd.
+8615151475053
biopole@163.com China 37 58
WUHAN JADECHEM INTERNATIONAL TRADE CO.,LTD
+86-83527060 +86-13972901456
sales03@jadechem-intl.com China 84 58
Yujiang Chemical (Shandong) Co.,Ltd.
+86-17736087130 +86-18633844644
catherine@yjchem.com.cn China 990 58
Hebei Weibang Biotechnology Co., Ltd
+8615531157085
abby@weibangbio.com China 8810 58
Hebei Chuanghai Biotechnology Co,.LTD
+86-13131129325
sales1@chuanghaibio.com China 5889 58
Sinoway Industrial co., ltd.
0592-5800732; +8613806035118
xie@china-sinoway.com China 988 58
Hebei Weibang Biotechnology Co., Ltd
+8617732866630
bess@weibangbio.com China 18151 58
Hebei Kingfiner Technology Development Co.Ltd
+86-15532196582 +86-15373005021
lisa@kingfinertech.com China 3010 58

25322-68-3()Verwandte Suche:


  • 2-ethanediyl),.alpha.-hydro-.omega.-hydroxy-Poly(oxy-1
  • Alcox E 160
  • Alcox E 30
  • Poly(ethylene oxide),approx. M.W. 900,000
  • POLYETHYLENE GLYCOL 1550PRACT.
  • Poly(ethylene glycol),Macrogol 35,000, PEG
  • Poly(ethylene glycol),Macrogol 3,000, PEG
  • Poly(ethylene glycol),Macrogol 300, PEG
  • Polyethylene glycol solution,PEG solution
  • Polyethylene glycol 200, synthesis grade
  • PEG 600 5g [25322-68-3]
  • PEG 1000 1g [25322-68-3]
  • 500 G POLYETHYLENE GLYCOL 1550PRACT.
  • Poly(ethylene oxide),PEO
  • Polyethylene Oxide (100 mg)
  • Polyethylene glycol, MW ≈ 6,000
  • Polyethylene glycol, MW ≈ 4,000
  • alkapolpeg-8000
  • alpha,omega-Hydroxypoly(ethylene oxide)
  • alpha-Hydro-omega-hydroxypoly(oxy-1,2-ethanediyl)
  • alpha-hydro-omega-hydroxy-poly(oxy-2-ethanediyl)
  • alpha-Hydro-omega-hydroxypoly(oxyethylene)
  • Bradsyn PEG
  • bradsynpeg
  • Carbowax 100
  • Carbowax 1500
  • Carbowax 1540
  • Carbowax 20
  • Carbowax 200
  • Carbowax 2OM
  • Carbowax 300
  • Carbowax 5000
  • Carbowax 550
  • Carbowax 600
  • Carbowax 6000
  • Carbowax E-9000
  • carbowax10000
  • Ethylene polyoxide
  • ethyleneglycolhomopolymer
  • ethyleneglycolpolymer
  • ethyleneoxide,homopolymer
  • ethylenepolyoxide
  • Gafanol E 200
  • Gafanol E 300
  • gafanole200
  • Glycols, polyethylene
  • glycols,polyethylene
  • HM 500
  • hm500
  • jorchem400ml
  • Laprol 402
  • Lineartop P
  • M 9000
  • macrogol1000
  • Merpol OJ
  • merpoloj
  • Modopeg
  • Modopeg 4000
Copyright 2019 ? ChemicalBook. All rights reserved