ELECTRONIC GRADE PROPYLENE GLYCOL MONOMETHYL ETHER
Paint chemicals 2025-03-21
Propylene Glycol Methyl Ether and Ethylene Glycol Ether belong to the same class of diol ether solvents. The toxicity of Propylene Glycol Ether to human body is lower than that of Ethylene Glycol Ether products, which belongs to low toxicity ether class. Propylene Glycol Methyl Ether has a weak ether flavor but no strong irritating odor, which makes it more widely and safely used. Because of its molecular structure has both ether group and hydroxyl group, its solubility performance is very excellent, and it has suitable volatilization rate and reaction activity and other characteristics to obtain broad application.
Electronic Grade Propylene Glycol Monomethyl Ether (PGME) – Technical Overview
1. Introduction
Electronic Grade Propylene Glycol Monomethyl Ether (PGME, CAS 107-98-2) is a high-purity solvent specifically formulated for semiconductor and electronics manufacturing processes. With ultra-low metal ion content and exceptional chemical stability, it meets stringent industry requirements for microelectronics applications.
2. Key Specifications
Table 1: Technical Specifications of Electronic Grade PGME
| Parameter | Specification | Test Method |
|---|---|---|
| Purity | ≥99.99% | GC |
| Water Content | ≤50 ppm | Karl Fischer |
| Metal Impurities | ||
| – Na | ≤1 ppb | ICP-MS |
| – K | ≤1 ppb | ICP-MS |
| – Fe | ≤1 ppb | ICP-MS |
| – Cu | ≤1 ppb | ICP-MS |
| Particle Count | ≤5 particles/mL (>0.2 μm) | LS |
| Acidity (as CH₃COOH) | ≤10 ppm | Titration |
| Color (APHA) | ≤10 | Visual |
| Density (20°C) | 0.923-0.928 g/cm³ | Digital densitometer |
3. Performance Advantages
Table 2: Comparative Advantages of Electronic Grade PGME
| Feature | Electronic Grade PGME | Industrial Grade PGME |
|---|---|---|
| Purity Level | 99.99%+ | 99.5%-99.9% |
| Metal Contamination | ≤1 ppb | 10-100 ppm |
| Particle Control | Class 1 Cleanroom | No control |
| Application | Semiconductor processes | General industrial use |
| Packaging | High-purity drums/bottles | Standard containers |
4. Critical Applications in Electronics
4.1 Photolithography
Photoresist thinner – Optimal viscosity control for spin coating
Edge bead removal – Selective dissolving without substrate damage
4.2 Cleaning Processes
Wafer cleaning – Removes organic contaminants without ionic residue
Equipment maintenance – Precision cleaning of deposition chambers
4.3 Other Applications
PCB manufacturing – Flux removal and surface preparation
Display production – LCD panel cleaning agent
5. Handling and Safety
| Aspect | Requirement |
|---|---|
| Storage | Nitrogen-purged containers, <30°C |
| Filtration | 0.1 μm PTFE filter before use |
| PPE | Cleanroom suit, chemical gloves |
| Fire Protection | CO₂/dry chemical extinguisher |
6. Quality Assurance
Batch Certification – Full traceability with Certificate of Analysis
Cleanroom Packaging – ISO Class 5 environment
Stability Testing – 24-month shelf life verification
7. Industry Standards Compliance
SEMI C12 – Guide for PGME in semiconductor applications
IPC-CH-65 – Cleaning guidelines for electronics
UL ECVP – Environmental compliance verification
