What is the physical state of MPEG-350 at room temperature?

MPEG-350 is a liquid at room temperature (25°C). Due to its relatively low molecular weight (approx. 350), it does not solidify like higher molecular weight grades (e.g., MPEG-1000 or MPEG-2000), making it easy to handle and pump in liquid processing systems.

What is the primary industrial use of MPEG-350?

Its primary application is as a chemical intermediate. It is esterified with acrylic acid or methacrylic acid to produce macromonomers, which are then polymerized to create polycarboxylate ether (PCE) superplasticizers used in high-performance concrete admixtures.

Methoxypolyethylene Glycol 350 CAS 9004-74-4

Methoxypolyethylene Glycol, specified as grade MPEG-350 with CAS 9004-74-4, is a low-molecular-weight glycol ether that exists as a clear, colorless liquid at room temperature. As a specialized nonionic solvent and chemical intermediate, it features a terminal hydroxyl group and a methyl end-cap, making it a crucial raw material for esterification reactions. It is predominantly utilized in the synthesis of polycarboxylate superplasticizers for the construction industry and as a functional lubricant or solvent in textile and ink processing. We ensure bulk supply with competitive factory pricing for industrial clients. Our inventory is managed to support customized specifications, and every shipment is accompanied by complete MSDS, TDS, COA documentation.

CAS: 9004-74-4
Synonyms: Poly(ethylene glycol) methyl ether, mPEG 350, Methoxy PEG, Polyethylene Glycol Monomethyl Ether, Methyl Polyglycol, Methoxypolyethylene Glycol Ether
Einecs: 618-394-3
Molecular Formula: CH₃O(CH₂CH₂O)ₙH
Grade: Industrial grade 99%
Package: 200kg iron drum or 50kg plastic drum packaging

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Product Description

1 Physicochemical properties

2 Application Areas

3 Storage conditions

4 ‌‌Safety precautions

Physicochemical properties

Property	Description
Chemical Name	Methoxypolyethylene Glycol 350 (MPEG-350)
CAS Number	9004-74-4
EINECS Number	618-394-3
Appearance	Colorless liquid
Purity	≥99%
Density	1.094 g/mL (at 25℃)
Melting Point	-8℃
Boiling Point	>200℃ (at 760 mmHg)
Flash Point	268℃
Refractive Index	1.459 (at 20℃)
Solubility	Soluble in water, ethanol, and most high-polarity organic solvents
Stability	Stable under normal conditions, incompatible with strong oxidizers, strong acids, and strong bases
pH Value (1% aqueous solution)	5.0-7.0
Hydroxyl Value	146-178 mgKOH/g

Application Areas

Daily chemical industry: thickeners and emulsion stabilizers for personal care products such as shampoo and shower gel. Used as moisturizers and emollients in cosmetics.
Textile printing and dyeing: fiber lubricant, reduces static electricity and friction, and enhances processing efficiency.
Building materials industry: raw materials for polycarboxylate-based superplasticizers, which improve the fluidity of concrete.
Industrial lubrication: lubricants and rust preventatives for metalworking fluids

Storage conditions

Store in a sealed container at room temperature, avoiding exposure to high temperatures and direct sunlight.

‌‌Safety precautions

Avoid contact with strong oxidizers, strong acids, and strong alkalis.
Wear protective gloves and goggles during operation to prevent skin contact

FAQ - Technical & Supply Chain

Q:
What is the physical state of MPEG-350 at room temperature?

A: MPEG-350 is a liquid at room temperature (25°C). Due to its relatively low molecular weight (approx. 350), it does not solidify like higher molecular weight grades (e.g., MPEG-1000 or MPEG-2000), making it easy to handle and pump in liquid processing systems.
Q:
What is the primary industrial use of MPEG-350?

A: Its primary application is as a chemical intermediate. It is esterified with acrylic acid or methacrylic acid to produce macromonomers, which are then polymerized to create polycarboxylate ether (PCE) superplasticizers used in high-performance concrete admixtures.

Documents

Documents and Product Support

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COA for batch-based quality reference
TDS for key physical and chemical information
SDS / MSDS for handling, storage, and safety reference
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Technical communication based on application and specification requirements

Quotation

Information to Confirm Before Quotation

Clear sourcing information helps reduce specification mismatch and allows a more accurate quotation before sample or bulk order discussion.

Product name and CAS number
Application or intended end use
Required purity, grade, or specification
Sample quantity, trial order, or bulk demand
Preferred packing form or net weight
Destination country or port
Required documents or compliance expectations

Storage & Handling

Packaging, Storage, and Handling Notes

Packaging form, storage conditions, shelf life, and shipment arrangements should be confirmed according to the product characteristics, package size, and destination requirements.

Before order confirmation, buyers are advised to review the corresponding product documents and confirm whether any special storage, labeling, or handling requirements apply.

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Tags:

Methoxy PEG Nonionic Emulsifier Polyether Modifier

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