Polyethylene Glycol (PEG) 4000 Lab Grade *

Also Known As Polyethylene Glycol 4000 Molecular Weight


Select size:
Sale price $46.00
Sale price $50.00
Sale price $98.00
Sale price $184.00
Sale price $224.00
Sale price $360.00
Sale price $740.00
Sale price $770.00
*Custom Product may require additional time to process.
For questions regarding lead team, please contact a member of our Customer Care Team at customerservice@laballey.com

About Polyethylene Glycol (PEG) 4000 Lab Grade

Polyethylene Glycol, (C2nH4n+2On+1), is synthesized by ring-opening polymerization of ethylene oxide. This synthesis process gives PEG a range of molecular weights and distributions from 300 grams per mole to 10,000,000 grams per mole.

PEG 4000 has a molecular weight of 4000 and is colorless, inert, odorless, and non-volatile. PEG is biocompatible (it won’t damage tissues or cells), hydrophilic, dissolves readily in water without changing the color odor or taste, and is nontoxic. The number 4000 mentioned with the Polyethylene Glycol 4000,  describes its average molecular weight. Lab Grade chemicals possess reasonable purity but do not comply with any official standard for quality or purity. It is recommended to use Lab Alley’s Polyethylene Glycol 4000, Lab Grade be used in training institutes, research labs, and for other commercial applications.

Common Uses and Applications

  • PEG 4000 is used in research labs for the precipitation of proteins, viruses, DNA and RNA.
  • PEG 4000 is used to synthesize hydrogels
  • PEG 4000 is used as an additive in cement to aid in solvency and lubrication


Chemistry Table


Polyethylene Glycol (PEG) 4000 Lab Grade Specifications

Average molecular weight 3600-4400
Range of Average Hydroxyl Number, mg KOH/g 25-32
Average Number of Repeating Oxyethylene Units 90
Density, g/cm3 at 60°C 1.093
Melting or Freezing Range, °C 53-59
Viscosity at 100°C, cSt 140.4

Safety and Shipping Information

This chemical is not considered hazardous by the 2012 OSHA Hazard Communication Standard (29 CFR 1910.1200)

One-Time Purchase

Have a question?

Questions & Answers

Have a Question?

Be the first to ask a question about this.

Ask a Chemistry Question