methoxypolyethylene glycols cas 9004-74-4

Chemical Name: Methoxypolyethylene glycols
CAS No.: 9004-74-4
Molecular Formula: C5H12O3
Molecular weight: 20.14698
Appearance:White flake
Assay: 2000~2400

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Table of Contents

Methoxypolyethylene Glycols (mPEG, CAS 9004-74-4): Product Specifications

Technical Parameters

Parameter mPEG 350 mPEG 2000 mPEG 5000 Conventional PEG
Molecular Weight Range 300-400 1,900-2,200 4,800-5,200 200-20,000
Hydroxyl Value (mg KOH/g) 140-160 28-36 11-14 Variable
End Group Purity >95% >97% >98% N/A

Quality Certifications

USP/NF Grade | REACH Registered | ISO 9001:2015 Certified Manufacturing

Critical Applications in Pharmaceutical & Industrial Sectors

1. Drug Delivery Systems

mPEG derivatives enable:

  • PEGylation of proteins/peptides (extend circulation half-life)
  • Lipid nanoparticle (LNP) formulations for mRNA vaccines
  • Solubility enhancement for poorly water-soluble APIs

2. Biomedical Research

  • Surface modification of medical devices
  • Hydrogel matrices for 3D cell culture
  • Controlled drug release microparticles

Verified Customer Implementations (2023-2024)

Case Study 1: mRNA Vaccine Excipient Development

Client: European Biopharma Company

Challenge: Required GMP-grade mPEG 2000 for stabilizing lipid nanoparticles in COVID-19 booster vaccines

Solution: Supplied 98.7% pure mPEG with full ICH Q3D elemental impurity documentation

Outcome: Achieved 12-month stability at 2-8°C storage

Case Study 2: Ophthalmic Drug Formulation

Client: US Ophthalmic Solutions Manufacturer

Challenge: Needed low-viscosity mPEG 350 for sustained-release eye drops

Solution: Customized narrow MW distribution (PDI <1.05)

Outcome: Extended corneal residence time by 3.2x vs standard PEG

Procurement Best Practices

Supplier Evaluation Criteria

Factor Criticality Industry Benchmark
Batch-to-Batch Consistency High ±2% MW variation
Residual Catalyst Levels Critical <10 ppm metal content

Request Customized Technical Support

Contact our polymer science team:

Email: info@vivalr.com
Tel: (86) 15866781826

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