MPEG 350

METHOXYPOLYETHYLENE GLYCOL 350

CAS Number: 9004-74-4
Molecular Formula: CH3O(CH2CH2O)nH

Methoxypolyethylene glycol 350 is a polymer similar in structure and nomenclature to polyethylene glycols.

MPEG 350 (Methoxypolyethylene Glycol) belongs to the category of Intermediates and is used as a reference standard in research.
The CAS Number of MPEG 350 (Methoxypolyethylene Glycol) is 9004-74-4

Methoxypolyethylene Glycol of with an average molecular mass of 350. 
Methoxypolyethylene Glycol (MPEG) is used in various applications such as micelles for drug delivery as well as in modifications of therapeutic proteins to improve their pharmacokinetics.

Methoxy polyethylene glycols are addition polymers of ethylene oxide and methanol, represented by the generalised formula CH3O-(CH2-CH2-O)n-H, with Œn¹ indicating the average number of oxyethylene groups.

In chemical abstracts methoxy polyethylene glycols are described under the scientific name Poly(oxy-1,2-ethanediyl)-a-methyl-w-hydroxy in combination with the CAS register number 9004-74-4. 
Other names are polyethylene glycol monomethyl ether and methoxy polyethylene glycol.

Methoxy polyethylene glycols are available in average molecular weights ranging from 350 to 5000. 
All MPEGs are designated by a number indicating the average molecular weight. 

MPEG 350 and 500 are clear viscous liquids at room temperature but MPEG 750 and 1000 require a temperature above 40°C. 
MPEG 2000, 3000 and 5000 are white waxy solids that are supplied in flake form. 

Some grades may also be supplied in molten form. 
For special product demands, information on applications or other special requirements contact the local sales office.

All MPEGs are soluble in many polar solvents as aliphatic ketones, alcohols, glycol ethers, esters and aromatic hydrocarbons. 
MPEGs are readily miscible with water, the solid MPEGs are slightly less soluble in water with their solubility decreasing as molecular weight increases.

Applications of MPEG 350:
Methoxypolyethylene Glycol of with an average molecular mass of 350. 
Methoxypolyethylene Glycol (MPEG) is used in various applications such as micelles for drug delivery as well as in modifications of therapeutic proteins to improve their pharmacokinetics.

Methoxypolyethylene glycol 350 has been used in a study to assess the synthesis of a new class of thermosensitive micellar cyclotriphosphazenes. 
MPEG 350 has also been used in a study to investigate synthesis of a new amphiphilic poly(organophosphazene) by stepwise nucleophilic substitution.

Methoxypolyethylene Glycol (MPEG) 350  is PEG-6 methyl ether-based plasticizer. 
MPEG 350 maintains wet-tack strength. 

Methoxypolyethylene Glycol (MPEG) 350 possesses lubricity and humectant properties. 
MPEG 350 is used in pressure sensitive and thermoplastic adhesives.

MPEG 350 are used in a wide range of lubricant applications due to their low volatility, solubility in water, and natural lubricity. 
They are non-staining to metal parts, textiles, and clothing and can be burned away leaving minimal residue.

Adhesives
Lubricants
Agriculture
Metalworking
Ceramics
Paints & Coatings
Chemical Intermediates
Paper & Paper Products
Cosmetics & Personal Care
Pharmaceuticals
Electronics
Printing & Inks
Electroplating / Electropolishing
Rubber & Elastomers
Food Processing & Packaging
Textiles
Household Products
Wood Processing

Typical Applications of MPEG 350:
Adhesives
Chemical Intermediates
Inks and Dye Carrier
Lubricants
Plasticizer
Soaps and Detergents

Handling and Storage of MPEG 350:
Methoxypolyethylene Glycol 350 is sold as a liquidand can be stored inside a warm building without provision for heating. 
If storage time is prolonged orif tank is heated or in a hot climate, MPEG 350 is preferable to store this product under a nitrogen atmosphere.
If heated storage is required, metal temperature should not exceed 50°C.

Appearance: Colourless Thick Oil
Molecular Weight N/A
Storage: Refrigerator
Solubility: Chloroform (Sparingly), Methanol (Slightly)
Category: Building Blocks; Miscellaneous;

Functions: Chemical Intermediate, Low Volatility, Solubility In Water, Natural Lubricity
Benefits: Low toxicity

Properties of MPEG 350:
Quality Level: 200
Description: non-ionic
Mol wt:average mol wt 350
Application(s): microbiology
InChI: 1S/C3H8O2/c1-5-3-2-4/h4H,2-3H2,1H3
InChI key: XNWFRZJHXBZDAG-UHFFFAOYSA-N

Typical Physical Properties of MPEG 350: 
Physical Form: Liquid
Average Number of Repeating Oxyethylene Units: 7
Range of Average Molecular Weight: 335 – 365
Range of Average Hydroxyl Number, mg KOH/g: 154 – 167
Density, g/cm3 at 20°C: 1.09
Melting or Freezing Range, °C: -5 to 10
Solubility in Water at 20°C, % by weight: Complete
Viscosity at 100°C, cSt: 3.9
Heat of Fusion, Cal/g: 26

Specifications of MPEG 350:
CAS Number: 25322-68-3,9004-74-4
Grade: Technical
Appearance: liquid
Boiling Point: > 200 °C (> 392 °F)
Color: Clear, Colorless
Density: 1.0899 g/cm3 @ 20 °C (68 °F)
Flash Point: 182 °C (360 °F)
Freezing Point: -5 - 10 °C (23 - 50 °F)
Kinematic Viscosity: 3.9 mm2/s @ 98.9 °C (210.0 °F)
Odor: mild
pH: 4.5 - 7.5 @ 20 - 25 °C (68 - 77 °F)
Recommended Use: Industrial chemical
Relative Vapor Density: > 10
Solubility in Water: soluble
Vapor Pressure: < 0.01 mmHg @ 20 °C (68 °F)

Synonmys of MPEG 350:
α-Methyl-ω-hydroxypoly(oxy-1,2-ethanediyl)
Polyoxyethylene Monomethyl Ether
Poly(Ethylene Oxide) Methyl Ether
Poly(Ethylene Oxide) Monomethyl Ether
Polyethylene Glycol Methyl Ether
Polyethylene Glycol Monoether with Methyl Diglycol
Polyethylene Glycol Monomethyl Ether
Pluriol A 350E
PEG-MME 350
O-Methoxypolyethylene Glycol
Monomethoxy Poly(ethylene oxide)
Monomethoxypolyethylene Glycol
Monomethoxypolyoxyethylene
Methoxypoly(ethylene glycol)
Methoxypolyethylene Glycol
Methyl Polyglycol
Methyl Polyoxyethylene
Macrogol Monomethyl Ether
MPEG 350
Carbowax MPEG 350