Description

Ddao CAS NO 118290-05-4 is a high-purity chemical intermediate, also known as 1,3-Dimethyl-2-imidazolidinone (DMI). This versatile, aprotic polar solvent is valued for its exceptional thermal and chemical stability, high boiling point, and strong solvating power. It is a critical component in the synthesis of advanced polymers, pharmaceuticals, and agrochemicals, serving industries that require reliable, high-performance reaction media and processing aids.

Application

• Pharmaceutical Synthesis: Used as a reaction solvent and catalyst in the production of active pharmaceutical ingredients (APIs), particularly for peptide coupling and other sensitive reactions.
• Polymer & Fiber Production: Acts as a spinning solvent for high-performance aramid fibers (e.g., Kevlar-type) and as a processing aid for polyimides and other engineering plastics.
• Agrochemical Formulation: Employed as a solvent and carrier in the manufacture of pesticides and herbicides due to its excellent solubility and stability.
• Electronics & Coatings: Serves as a solvent for photoresists, insulating varnishes, and specialty coatings where high purity and residue-free evaporation are required.
• Chemical Intermediate: Functions as a key building block in organic synthesis, including as a precursor for other specialty chemicals.
• Gas Purification: Utilized as an absorbent for acid gases like CO2 and H2S in natural gas treatment and other industrial gas streams.

Basic Information

Product Name	Ddao
CAS No.	118290-05-4
Molecular Formula	C5H10N2O
Molecular Weight	114.15 g/mol
Synonyms	1,3-Dimethyl-2-imidazolidinone; DMI; N,N'-Dimethylethyleneurea; 1,3-Dimethylimidazolidin-2-one; DMEU; DDAO; 118290-05-4
EINECS	Contact for details

Quality Control

Our Ddao is manufactured under strict quality management systems. Each batch undergoes rigorous analytical testing, including Gas Chromatography (GC) and Karl Fischer titration, to ensure it meets the high-purity standards required for sensitive applications in pharmaceuticals and electronics. Certificates of Analysis (COA) documenting identity, purity, and impurity profiles are available for every shipment.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at room temperature (15-25°C). Keep away from strong oxidizing agents and acids. The product is hygroscopic; ensure containers are sealed tightly after use to minimize moisture absorption.

Specification

Item	Specification
Appearance	Colorless to pale yellow liquid
Identification (IR)	Conforms
Assay (GC)	≥ 99.0%
Water Content (KF)	≤ 0.1%
Density (20°C)	1.055 - 1.065 g/mL
Refractive Index (20°C)	1.468 - 1.472

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