Isopropyl Alcohol vs Denatured Alcohol Proof C
Comprehensive comparison of Isopropyl Alcohol and Denatured Alcohol Proof C including physical properties, applications, safety considerations, and pricing. Alliance Chemical supplies both chemicals in various grades and concentrations.
Quick Comparison Summary
Denatured Alcohol Proof C
- CAS:
- Mixture
- Formula:
- C₂H₅OH (Ethanol) + Denaturants (e.g., Methanol)
Physical & Chemical Properties Comparison
| Property | Isopropyl Alcohol | Denatured Alcohol Proof C | Key Difference |
|---|---|---|---|
| Boiling Point | 82.6 °C | 78-79°C (for ethanol, may vary slightly based on denaturants) | Isopropyl Alcohol boils 4.6°C higher |
| Flash Point ⚠️ | 12 °C | 13°C (for ethanol, may vary slightly based on denaturants) | Isopropyl Alcohol is more flammable |
| Density | 0.785 g/cm³ | 0.79-0.81 g/cm³ (typical range, may vary slightly based on denaturants) | Isopropyl Alcohol is denser |
| Water Solubility | Miscible with water | Miscible with water | Both fully water soluble |
| pH | N/A | Not applicable | Data not available for direct comparison |
| Molecular Weight | 60.10 g/mol | Varies | Isopropyl Alcohol is heavier molecule |
| Melting Point | -89.5 °C | -114.1°C (for ethanol, may vary slightly based on denaturants) | Isopropyl Alcohol melts 24.5°C higher |
| Vapor Pressure | 43 mmHg at 20°C | 59 mmHg at 20°C (for ethanol, may vary slightly based on denaturants) | Denatured Alcohol Proof C is more volatile |
| Auto-ignition Temp ⚠️ | 399 °C | 363°C (for ethanol, may vary slightly based on denaturants) | Denatured Alcohol Proof C auto-ignites at lower temp |
| Vapor Density | 2.07 (air = 1) | 1.6 (air = 1) (for ethanol, may vary slightly based on denaturants) | Isopropyl Alcohol vapors sink more |
| Appearance | Clear, colorless liquid | Clear, colorless liquid | Similar appearance |
| Odor | Slight alcohol odor | Characteristic alcoholic odor |
Data sourced from PubChem (NIH), OSHA Technical Guidelines, and Alliance Chemical laboratory analysis. Last verified June 2026.
Applications & Use Cases
Isopropyl Alcohol Best For:
- Solvent
- Disinfectant
- Cleaning agent
- Laboratory reagent
- Intermediate in chemical synthesis
Denatured Alcohol Proof C Best For:
- Industrial solvent
- Laboratory reagent
- Cleaning agent
- Surface preparation
- Paint thinner
Choosing Between Them
The right choice depends on your specific application, required purity, and handling capabilities. Contact our team for guidance on which chemical best fits your needs.
Safety & Handling Comparison
Storage Requirements
Always store in original containers in a cool, well-ventilated area per NFPA 30 guidelines. Refer to each product's SDS for specific storage temperature ranges and incompatible materials.
PPE Requirements
At minimum: chemical-resistant gloves, safety goggles, and adequate ventilation per OSHA 29 CFR 1910.132-138. Check each SDS below for chemical-specific PPE requirements.
Fire Hazard
Isopropyl Alcohol has a lower flash point and requires extra fire precautions.
Safety Data Sheets (SDS)
Which Chemical Should You Choose?
Decision Snapshot
| Decision Factor | Better Fit | Why |
|---|---|---|
| Evaporation Profile | Denatured Alcohol Proof C | Lower boiling point supports faster flash-off. |
| Fire Safety Margin | Denatured Alcohol Proof C | Higher flash point generally reduces ignition risk in handling and storage. |
| Application Breadth | Tie | Compares distinct listed use cases to avoid generic recommendations. |
| Purity Flexibility | Standard grades | Based on availability of 99%+ concentration options in current product metadata. |
Choose Isopropyl Alcohol if:
Best for: Precision cleaning, electronics work, and workflows needing predictable IPA behavior.
Watch-out: Not interchangeable where denatured ethanol formulations are explicitly specified.
- You specifically need support for solvent applications.
- You specifically need support for intermediate in chemical synthesis applications.
- You need a higher-boiling solvent that stays in-process longer.
- You can manage stricter flammable-liquid controls for lower flash-point performance.
Choose Denatured Alcohol Proof C if:
Best for: Denatured ethanol use cases in coatings, fuel blending, and industrial wipe-downs.
Watch-out: Denaturants can be undesirable in some lab-grade and sensitive cleaning workflows.
- You specifically need support for industrial solvent applications.
- You specifically need support for surface preparation applications.
- You want a faster-evaporating solvent for quick-dry production steps.
- Fire-risk controls are a priority and you prefer the higher flash-point option.
Commercial & Fulfillment Snapshot
Built for purchasing teams that need predictable dispatch, compliant documentation, and freight flexibility from parcel to full truckload.
| Procurement Advantage | Isopropyl Alcohol | Denatured Alcohol Proof C |
|---|---|---|
| Grade & Concentration Coverage | 91% with industrial/lab procurement support. | multiple concentration options by application with industrial/lab procurement support. |
| Packaging Depth | small packs through bulk freight quantities for parcel, pallet, and truckload planning. | small packs through bulk freight quantities for parcel, pallet, and truckload planning. |
| Dispatch SLA | Lane-scheduling cutoff is 1 PM CT (Mon-Thu) and noon CT Friday. Outbound dispatch from Taylor, TX typically completes within 1-2 business days. | Lane-scheduling cutoff is 1 PM CT (Mon-Thu) and noon CT Friday. Outbound dispatch from Taylor, TX typically completes within 1-2 business days. |
| Freight Optionality | UPS Ground for small packs plus LTL/FTL lanes through ABF, SEFL, Saia, XPO, and partner carriers. | UPS Ground for small packs plus LTL/FTL lanes through ABF, SEFL, Saia, XPO, and partner carriers. |
| Compliance Readiness | SDS ready now; COA/TDS support available pre-PO and post-order. | SDS available on request; COA/TDS support available pre-PO and post-order. |
| Bulk Procurement CTA | Request bulk quote or call (512) 365-6838. | Request bulk quote or call (512) 365-6838. |
Need Help Deciding? Our technical team can help you choose the right chemical for your specific application. Email sales@alliancechemical.com for expert guidance.
Request Bulk Quote
Share your quantity, pack size, and destination. We will reply with pricing, freight options, and documentation.
Prefer email? sales@alliancechemical.com
Ready to Order?
Alliance Chemical supplies both Isopropyl Alcohol and Denatured Alcohol Proof C in various grades and package sizes.