ChemicalBook > CAS DataBase List > Methoxypolyethylene glycols

Methoxypolyethylene glycols

Product Name: Methoxypolyethylene glycols
CAS No.: 9004-74-4
Chemical Name: Methoxypolyethylene glycols
Synonyms: MPEG;MPEG-OH;METHOXYPOLYETHYLENE GLYCOL;MEO-PEG-OH;POLYETHYLENE GLYCOL MONOMETHYL ETHER;MEO-PEG-COOH;POLYETHYLENE GLYCOL MONOMETHYL ETHER 550;MPEG 500;MPEG 2000;MPEG 5000
CBNumber: CB6228002
Molecular Formula: (C2H4O)nCH4O
Formula Weight: 120.14698
MOL File: 9004-74-4.mol

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Methoxypolyethylene glycols Property

Melting point:: 60-64 °C
Boiling point:: >200°C/760mmHg
Density: 1.094 g/mL at 25 °C
vapor density: >1 (vs air)
vapor pressure: 0.05 mm Hg ( 20 °C)
refractive index: n20/D 1.459
Flash point:: 268 °C
storage temp.: -20°C
solubility: H₂O: 50 mg/mL at 25 °C, clear, colorless
form: semisolid
Specific Gravity: 1.094
color: White to pale yellow
Odor: Mild odor
PH: 5.5-7.0 (25℃, 50mg/mL in H2O)
Water Solubility: Slightly miscible with water.
λmax: λ: 260 nm Amax: 0.06
λ: 280 nm Amax: 0.03
α-end: methoxy
Ω-end: hydroxyl
Stability:: Stable. Incompatible with strong oxidizing agents, strong acids, strong bases.
InChIKey: XNWFRZJHXBZDAG-UHFFFAOYSA-N
LogP: -0.800 (est)
EPA Substance Registry System: Poly(oxy-1,2-ethanediyl), .alpha.-methyl-.omega.-hydroxy- (9004-74-4)

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Safety

Safety Statements: 24/25-22
WGK Germany: 3
RTECS: PE8271000
F: 3
TSCA: Yes
HS Code: 29091990

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Hazard and Precautionary Statements (GHS)

Symbol(GHS)

Signal word

Danger

Hazard statements

H302Harmful if swallowed

H319Causes serious eye irritation

H335May cause respiratory irritation

H336May cause drowsiness or dizziness

H372Causes damage to organs through prolonged or repeated exposure

Precautionary statements

P260Do not breathe dust/fume/gas/mist/vapours/spray.

P261Avoid breathing dust/fume/gas/mist/vapours/spray.

P264Wash hands thoroughly after handling.

P264Wash skin thouroughly after handling.

P270Do not eat, drink or smoke when using this product.

P271Use only outdoors or in a well-ventilated area.

P280Wear protective gloves/protective clothing/eye protection/face protection.

P301+P312IF SWALLOWED: call a POISON CENTER or doctor/physician IF you feel unwell.

P304+P340IF INHALED: Remove victim to fresh air and Keep at rest in a position comfortable for breathing.

P305+P351+P338IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.

P312Call a POISON CENTER or doctor/physician if you feel unwell.

P314Get medical advice/attention if you feel unwell.

P330Rinse mouth.

P403+P233Store in a well-ventilated place. Keep container tightly closed.

P405Store locked up.

P501Dispose of contents/container to..…

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N-Bromosuccinimide Price

Sigma-Aldrich

Product number: 71578
Product name: Poly(ethylene glycol) methyl ether
Purity: BioUltra, 500
Packaging: 250g
Price: $162
Updated: 2025/07/31

Sigma-Aldrich

Product number: 71578
Product name: Poly(ethylene glycol) methyl ether
Purity: BioUltra, 500
Packaging: 1kg
Price: $173.6
Updated: 2025/07/31

Sigma-Aldrich

Product number: 202487
Product name: Poly(ethylene glycol) methyl ether
Purity: average Mn 550
Packaging: 5g
Price: $52.44
Updated: 2025/07/31

Sigma-Aldrich

Product number: 202487
Product name: Poly(ethylene glycol) methyl ether
Purity: average Mn 550
Packaging: 250g
Price: $116.85
Updated: 2025/07/31

TCI Chemical

Product number: P2183
Product name: Polyethylene Glycol Monomethyl Ether 400
Packaging: 100g
Price: $26
Updated: 2025/07/31

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Methoxypolyethylene glycols Chemical Properties,Usage,Production

Description

m-PEG36-alcohol is a PEG linker containing a hydroxyl group. The hydroxyl group enables further derivatization or replacement with other reactive functional groups. The hydrophilic PEG spacer increases solubility in aqueous media.

Chemical Properties

varies from viscous liquid to white flakes, depending

Uses

enteric coating controlled release and enteric release coatings

Uses

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.

Uses

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

Definition

ChEBI: A poly(ethylene glycol) terminated with a methyl group at one end.

brand name

Carbowax Sentry Methoxypolyethylene Glycol (Union Carbide).

General Description

It is a Polyethylene glycol (PEG) macromer with a reactive chain end consisting of methyl ether. Etherification of the PEG chain ends can be undertaken in basic conditions by reacting it with alkyl halides. mPEG can undergo cross linking to form hydrogels; polymerization can be initiated by redox reaction or free radical initiator.

Solubility in organics

Acetone, chloroform, cyclohexanone, dichloromethane, DMF, MEK, toluene (hot), water

Toxics Screening Level

The initial threshold screening level (ITSL) for polyethylene glycol methyl ether , also known as dowanol TMH, is 13 μg/m3 based on an annual averaging time.

Methoxypolyethylene glycols Preparation Products And Raw materials

Raw materials

Preparation Products

Benzonatate

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View Lastest Price from Methoxypolyethylene glycols manufacturers

Hebei Chuanghai Biotechnology Co., Ltd

Product: Methoxypolyethylene glycols 9004-74-4
Price: US $10.00/kg
Min. Order: 1kg
Purity: 99%
Supply Ability: 100 mt
Release date: 2024-11-18

Hebei Zhuanglai Chemical Trading Co.,Ltd

Product: Methoxypolyethylene glycols 9004-74-4
Price: US $10.00/kg
Min. Order: 1kg
Purity: 99%
Supply Ability: 5000
Release date: 2024-05-10

XIAMEN SINOPEG BIOTECH CO., LTD.

Product: Methoxypoly(ethylene glycol) 9004-74-4
Price: US $0.00-0.00/ASSAYS
Min. Order: 1化验
Purity: 98%
Supply Ability: 10kg
Release date: 2021-06-01

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