Description

Peg18 is a high-purity polyethylene glycol derivative, specifically an 18-unit PEG chain, widely utilized as a versatile intermediate and functional additive. Its primary value lies in its ability to modify solubility, enhance bioavailability, and improve the physical properties of formulations across multiple industries. This product is essential for manufacturers in the pharmaceutical, cosmetic, and specialty chemical sectors seeking reliable, high-quality PEGylation agents and polymer modifiers.

Application

• Pharmaceutical Intermediates: Serves as a crucial linker or spacer in the synthesis of prodrugs, bioconjugates, and PEGylated therapeutic agents to improve drug delivery and pharmacokinetics.
• Cosmetic & Personal Care Formulations: Acts as a non-ionic surfactant, humectant, and viscosity modifier in creams, lotions, and hair care products for enhanced texture and stability.
• Polymer Modification: Used to functionalize polymers and resins, imparting hydrophilicity, flexibility, and improved processing characteristics.
• Biotechnology Research: Employed in protein and peptide modification studies to reduce immunogenicity and increase circulatory half-life.
• Lubricant & Metalworking Fluids: Functions as a base fluid or additive providing lubrication and cooling properties in industrial applications.
• Chemical Synthesis: Utilized as a phase-transfer catalyst or solvent in organic synthesis reactions.

Basic Information

Product Name	Peg18
CAS No.	351342-04-6
Molecular Formula	C36H74O19
Molecular Weight	~ 810.96 g/mol
Synonyms	Polyethylene glycol 900; PEG 900; Poly(oxy-1,2-ethanediyl), α-hydro-ω-hydroxy- (18 mol EO average molar ratio); Macrogol 900; 1,2-Ethanediol, homopolymer; HO(CH2CH2O)nH (n~18); α-Hydro-ω-hydroxypoly(oxy-1,2-ethanediyl); Polyoxyethylene (18)
EINECS	Contact for details

Quality Control

Our Peg18 is manufactured under a strict quality management system to ensure batch-to-batch consistency and high purity. Each lot undergoes comprehensive analytical testing, including assay, impurity profiling, and physical characterization, to meet the stringent requirements of our global clientele. Certificates of Analysis (COA) documenting full specifications are available upon request.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at a controlled room temperature (15-25°C). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept sealed to prevent absorption of atmospheric moisture, which can affect product quality.

Specification

Item	Specification
Appearance	White to off-white waxy solid or viscous liquid
Identification (IR)	Conforms
Assay (HPLC)	≥ 98.0%
Water Content (KF)	≤ 1.0%
Average Molecular Weight	800 - 850 g/mol
pH (5% solution)	5.0 - 7.0
Heavy Metals (as Pb)	≤ 10 ppm

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.