Are Polyethylene Glycol 300 and PEG 300 the same substance under one CAS number?

A: Yes. Polyethylene Glycol 300 and PEG 300 refer to the same chemical substance and correspond to the same CAS number, defined by an average molecular weight around 300.

Is PEG 300 intended for industrial formulation use rather than laboratory research only?

A: PEG 300 is commonly used as an industrial ingredient in formulation systems, including plasticizer formulations, and is typically supplied for industrial production and processing contexts.

Polyethylene Glycol 300 CAS 25322-68-3

Polyethylene Glycol 300 (PEG 300) is a low–molecular weight polyethylene glycol commonly supplied as a clear, viscous liquid and used as an industrial ingredient in chemical formulations. Identified by CAS No. 25322-68-3, PEG 300 functions primarily through its polyether chain structure, providing compatibility, solubilization, and molecular flexibility within formulation systems. It is typically applied in plasticizer formulations, where controlled viscosity, polarity balance, and formulation stability are required in industrial processing environments. In terms of supply and documentation, this material is available with competitive factory pricing, supports customized specifications, and is provided with MSDS, TDS, COA documentation for bulk supply.

CAS: 25322-68-3
Synonyms: Polyethylene Glycol 300, PEG 300, Polyethylene Oxide 300, PEG-300
Einecs: 200-849-9
Molecular Formula: HO(CH₂CH₂O)ₙH
Grade: 99%
Package: 200kg iron drum, 50kg plastic drum packaging

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Product Description

Product Overview

Polyethylene Glycol 300 is best positioned as a functional additive / formulation ingredient / industrial chemical rather than a terminal consumer product. Based on the supplied product identity, it is used as a low-molecular-weight polyethylene glycol with solvent compatibility, viscosity control and formulation flexibility.

It is commonly applied in pharmaceutical and personal care systems as a solvent or co-solvent, and in industrial processing as a plasticizer, softener, wetting agent or lubricant. Because PEG grades are defined by average molecular weight, appearance and handling behavior may vary slightly depending on molecular-weight distribution and storage conditions.

For product evaluation, appearance, density, solubility and packaging should be confirmed according to the supplied grade and intended use.

Product Information / Specifications

Product Name	Polyethylene Glycol 300
Abbreviation	PEG 300 / PEG-300
CAS No.	25322-68-3
EINECS	200-849-9
Synonyms	Polyethylene Glycol 300, PEG 300, Polyethylene Oxide 300, PEG-300
Molecular Formula	HO(CH₂CH₂O)nH
Product Identity	Functional Additive / Formulation Ingredient / Industrial Chemical
Typical Supply Form	Low-molecular-weight polyether liquid

Physical & Chemical Properties

Appearance	Colorless transparent viscous liquid; some lots may show paste-like behavior under certain storage conditions
Density	Approx. 1.1–1.125 g/cm³ at 30°C
Boiling Point	Above 250°C
Flash Point	171°C
Refractive Index	1.458–1.463 at 20°C
Solubility	Miscible with water, ethanol, acetone and other polar solvents; generally insoluble in diethyl ether and most aliphatic hydrocarbons
Chemical Behavior	Shows alcohol-like reactivity and can undergo esterification with fatty acids

Applications

Used in pharmaceutical formulations as a solvent, co-solvent, emulsifier-supporting material, stabilizer and carrier or matrix component.
Suitable for topical, rectal, nasal and other formulation systems where a low-molecular-weight PEG grade is required.
Applied in personal care and related chemical systems requiring water-compatible solubilization and lubricity.
Used in industrial formulations as a plasticizer, softener, wetting agent and lubricant.
Can also be used as a processing reagent or working-fluid component in research and laboratory-related applications.

Packaging

200 kg iron drum
50 kg plastic drum

Packaging information may vary according to grade and shipment arrangement.

Storage Conditions

Store in a cool, dry and well-ventilated place.
Avoid prolonged exposure to temperatures above 40°C.
Keep the container tightly sealed during storage and transport.
Storage conditions may be adjusted according to specific product and logistics requirements.

Safety Precautions

Handle according to standard chemical operating procedures.
Use in closed or well-ventilated operating conditions where appropriate.
Avoid unnecessary skin and eye contact during transfer and processing.
Wear suitable gloves, protective eyewear and work clothing.
Refer to the current SDS for detailed first-aid, exposure control, handling and transport information.

FAQ

1. What is Polyethylene Glycol 300 used for?

It is used as a solvent, co-solvent, lubricant, wetting agent, plasticizer and carrier component in pharmaceutical, personal care and industrial formulation systems.

2. Are Polyethylene Glycol 300 and PEG 300 the same product?

Yes. Polyethylene Glycol 300 and PEG 300 refer to the same PEG grade under CAS 25322-68-3.

3. What type of material is PEG 300?

It is a low-molecular-weight polyethylene glycol supplied as a water-compatible polyether liquid for formulation and processing use.

4. Is PEG 300 soluble in water?

Yes. It is miscible with water and with several polar solvents such as ethanol and acetone.

5. Can PEG 300 be used in pharmaceutical formulations?

It is commonly used in pharmaceutical systems as a solvent, co-solvent, stabilizer, carrier or matrix component, depending on formulation requirements and grade suitability.

6. What packaging is commonly supplied?

Common packaging includes 200 kg iron drums and 50 kg plastic drums. Packaging may vary according to grade and logistics arrangement.

FAQ - Technical & Supply Chain

Q:
Are Polyethylene Glycol 300 and PEG 300 the same substance under one CAS number?

A: A: Yes. Polyethylene Glycol 300 and PEG 300 refer to the same chemical substance and correspond to the same CAS number, defined by an average molecular weight around 300.
Q:
Is PEG 300 intended for industrial formulation use rather than laboratory research only?

A: A: PEG 300 is commonly used as an industrial ingredient in formulation systems, including plasticizer formulations, and is typically supplied for industrial production and processing contexts.

Documents

Documents and Product Support

For product review and sourcing evaluation, supporting documents can be coordinated according to the product type, inquiry stage, and order requirements.

COA for batch-based quality reference
TDS for key physical and chemical information
SDS / MSDS for handling, storage, and safety reference
Packing information for sample, trial, and bulk orders
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.

Supply Support

Sample, Bulk Order and Repeat Supply Support

Support can be arranged for sample discussion, bulk supply planning, packaging confirmation, and routine sourcing communication based on the actual product and order requirements.

For repeat-use formulations or long-term procurement plans, buyers may discuss specification consistency, packaging preferences, delivery expectations, and document coordination in advance.

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Product Categories

Tags:

Humectant Solvent Pharmaceutical Excipient Polyether Humectant Water Soluble Polymer Water Soluble Solvent

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