n-Heptane
C₇H₁₆ · CAS 142-82-5
Electronic grade n-heptane for semiconductor wafer substrate degreasing, ArF immersion lithography lens cleaning, and GaN MOCVD reactor maintenance. HPLC grade for normal-phase chromatography and octane number reference standards.
Molecular Weight
100.20 g/mol
Boiling Point
98.4 °C
Density
0.684 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 | AR |
|---|---|---|---|---|---|
| Assay (GC) | GC-FID | % | ≥99.99 | ≥99.5 | ≥99.0 |
| Water Content (KF) | Karl Fischer | ppm | ≤20 | ≤20 | ≤500 |
| Benzene | GC-FID | ppm | ≤0.5 | ≤0.5 | ≤1 |
| Total Aromatics | GC-FID | ppm | ≤10 | ≤50 | ≤200 |
| Residue on Evaporation | Gravimetric | ppm | ≤2 | ≤2 | ≤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 n-Heptane Is Used
Semiconductor Process
- Wafer & substrate hydrocarbon degreasing
- ArF immersion lithography water-repellent topcoat (TARC) solvent
- GaN-on-SiC MOCVD reactor in-situ cleaning
- Immersion scanner lens maintenance cleaning
Laboratory & Analytical
- Normal-phase HPLC mobile phase
- SFC co-solvent
- Octane number primary reference fuel (PRF)
- GC calibration standard
Industrial & Other
- Aviation fuel octane testing standard
- rubber vulcanization process
- adhesive formulation
Packaging & Supply
Available Container Formats
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