Diethylene Glycol (DEG)

$C_{4}H_{10}O_{3}$ | Ethylene Glycol Process By-product | Transparent, Odorless, and Hygroscopic Liquid | Sourced from Shazand and Marun Petrochemicals | MizanPetroGas

Product Introduction

Diethylene Glycol, referred to in industry as DEG, is an aliphatic dialcohol with the chemical formula $C_{4}H_{10}O_{3}$ derived directly from the side reaction of Ethylene Oxide (EO) and Monoethylene Glycol (MEG) in the ethylene glycol production unit. This valuable compound is produced in standard conditions as a completely transparent, bright, and odorless liquid. Its most prominent physicochemical characteristic is its complete miscibility with water in any proportion, providing extraordinary flexibility in industrial processes. The presence of two hydroxyl groups (-OH) and an ether linkage (-O-) in its molecular structure makes DEG a powerful polar solvent, an effective humectant, and a key intermediate in the production chain of resins and polymers.

MizanPetroGas Company supplies Diethylene Glycol with guaranteed quality, sourced directly from Shazand Petrochemical (Arak) and Marun Petrochemical, offered in Bulk and new 220-liter drums (4 strapped drums per wooden pallet).

Pricing and Purchasing Diethylene Glycol (DEG)

The price of DEG in global markets is a function of ethylene and ethylene oxide feedstock prices, global MEG rates, shipping and logistics costs, and exchange rate fluctuations. Given domestic production at Shazand and Marun petrochemicals, this product enjoys a price competitive advantage in the Iranian market. Direct and bulk purchasing from MizanPetroGas eliminates intermediaries, providing competitive pricing, quality assurance, and sustainable supply planning for industrial consumers. Contact our experts to inquire about daily prices.

Technical Overview

Diethylene Glycol is a member of the glycols (diols) family and an intermediate product in the ethylene glycol manufacturing process. Its molecular structure includes two terminal hydroxyl groups separated by an ether bridge ($-CH_{2}-O-CH_{2}-$). This unique structure gives DEG dual properties: on one hand, high polarity and excellent water solubility (due to OH groups and hydrogen bonding), and on the other hand, molecular flexibility and controlled viscosity (due to the ether linkage).

DEG’s high boiling point (around 245°C) and extremely low vapor pressure (< 0.01 kPa at 25°C) make it a safe and stable option for high-temperature processes. Its strong hygroscopic (moisture-attracting) property also turns DEG into an ideal humectant and desiccant across various industries. The reactivity of the two OH groups allows DEG to be used as a diol monomer in the synthesis of polyesters and polyurethanes.

Key Features

• Transparent, bright, and odorless liquid
• Complete miscibility with water in any ratio
• Powerful polar organic solvent
• Excellent hygroscopic property
• High boiling point (~245°C)
• Extremely low vapor pressure
• Medium and controlled viscosity
• Good thermal and chemical stability
• Dual reactivity via OH groups
• Compatible with polymerization processes
• High flash point (relative safety)
• Domestic production with global quality

Applications and Target Industries

Packaging and Logistics

Safety and Storage