Methanol
CH₃OH · CAS 67-56-1
Electronic and HPLC-grade methanol for photoresist solvent systems, TFT-LCD process chemistry, and reverse-phase HPLC. Low UV cutoff (≤0.01 AU at 254 nm HPLC grade) and tight residue specification ensure reproducible performance.
Molecular Weight
32.04 g/mol
Boiling Point
64.7 °C
Density
0.791 g/mL
Molecular Formula
Available Grades
Analytical Specification
Analytical Specification Table
All values represent maximum allowable limits unless noted ≥. A lot-specific Certificate of Analysis (CoA) with ICP-MS, LPC, and GC data is issued for every shipment. Full data packages available on request.
| Parameter | Test Method | Unit | G4 | HPLC-G | HPLC | AR |
|---|---|---|---|---|---|---|
| Assay (GC) | GC-FID | % | ≥99.999 | ≥99.9 | ≥99.9 | ≥99.5 |
| Water Content (KF) | Karl Fischer | ppm | ≤20 | ≤30 | ≤50 | ≤1000 |
| UV Absorbance 200 nm | UV-Vis | AU | — | ≤0.50 | ≤1.0 | — |
| UV Absorbance 210 nm | UV-Vis | AU | — | ≤0.05 | ≤0.10 | — |
| UV Absorbance 254 nm | UV-Vis | AU | — | ≤0.005 | ≤0.01 | — |
| Acetone | GC-FID | ppm | ≤3 | — | ≤5 | ≤20 |
| Residue on Evaporation | Gravimetric | ppm | ≤1 | — | ≤1 | ≤5 |
★ G5 = SEMI C1 Tier D (6N grade). All metal values by ICP-MS. Particle counts by in-line LPC during ISO Class 3 fill. CoA available on request.
Grade Comparison
G1 → G5 Purity Scale
Select the grade that matches your process node and contamination budget. Every grade is available from PureTech with full lot CoA and ICP-MS data.
All grades tested by ICP-MS (28 elements), in-line LPC (ISO Class 3 fill), and Karl Fischer titration. G5 = SEMI C1 Tier D. Full CoA per lot. Request CoA template →
Application Areas
Where Methanol Is Used
Semiconductor Process
- Photoresist formulation co-solvent
- ArF/KrF/I-line lithography solvent system
- TFT-LCD array wet process chemistry
- Solar cell anti-reflection coating solvent
Laboratory & Analytical
- HPLC reverse-phase mobile phase
- LC-MS modifier
- NMR internal standard (0.49 ppm)
- protein denaturation & precipitation
Industrial & Other
- Formaldehyde synthesis
- acetic acid production (Monsanto process)
- biodiesel production
- paint & coating dilution
Battery & Energy Storage
Packaging & Supply
Available Container Formats
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