Denatured Alcohol Proof A vs Isopropyl Alcohol
Comprehensive comparison of Denatured Alcohol Proof A and Isopropyl Alcohol including physical properties, applications, safety considerations, and pricing. Alliance Chemical supplies both chemicals in various grades and concentrations.
Quick Comparison Summary
Denatured Alcohol Proof A
- CAS:
- Mixture
- Formula:
- C₂H₆O (Ethanol) with denaturants (e.g., methanol, isopropyl alcohol, methyl ethyl ketone, or others)
Physical & Chemical Properties Comparison
| Property | Denatured Alcohol Proof A | Isopropyl Alcohol | Key Difference |
|---|---|---|---|
| Boiling Point | 78.37 °C (for pure ethanol) | 82.6 °C | Isopropyl Alcohol boils 4.6°C higher |
| Flash Point ⚠️ | 13 °C (for pure ethanol) | 12 °C | Isopropyl Alcohol is more flammable |
| Density | 0.789 g/cm³ (for pure ethanol at 20°C) | 0.785 g/cm³ | Isopropyl Alcohol is denser |
| Water Solubility | Miscible with water | Miscible with water | Both fully water soluble |
| pH | 7.0 (Neutral) | N/A | Data not available for direct comparison |
| Molecular Weight | 46.07 g/mol (for pure ethanol) | 60.10 g/mol | Isopropyl Alcohol is heavier molecule |
| Melting Point | -114.1 °C (for pure ethanol) | -89.5 °C | Isopropyl Alcohol melts 24.5°C higher |
| Vapor Pressure | 59 mmHg at 20°C (for pure ethanol) | 43 mmHg at 20°C | Denatured Alcohol Proof A is more volatile |
| Auto-ignition Temp ⚠️ | 363 °C (for pure ethanol) | 399 °C | Denatured Alcohol Proof A auto-ignites at lower temp |
| Vapor Density | 1.6 (air = 1) (for pure ethanol) | 2.07 (air = 1) | Isopropyl Alcohol vapors sink more |
| Appearance | Clear, colorless liquid | Clear, colorless liquid | Similar appearance |
| Odor | Characteristic alcohol odor | Slight alcohol odor |
Data sourced from PubChem (NIH), OSHA Technical Guidelines, and Alliance Chemical laboratory analysis. Last verified March 2026.
Applications & Use Cases
Denatured Alcohol Proof A Best For:
- Industrial solvent
- Laboratory reagent
- Cleaning agent
- Fuel additive
- Surface preparation
Isopropyl Alcohol Best For:
- Solvent
- Disinfectant
- Cleaning agent
- Laboratory reagent
- Intermediate in chemical synthesis
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 A | Lower boiling point supports faster flash-off. |
| Fire Safety Margin | Denatured Alcohol Proof A | 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 Denatured Alcohol Proof A if:
Best for: Industrial fuel/blending or solvent uses where denatured ethanol is specified.
Watch-out: Denaturant package may be unsuitable for sensitive analytical workflows.
- You specifically need support for industrial solvent applications.
- You specifically need support for fuel additive 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.
Choose Isopropyl Alcohol if:
Best for: Lab and production cleaning where consistency and residue control are important.
Watch-out: Not a direct replacement where ethanol-based denatured standards are required.
- 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.
Commercial & Fulfillment Snapshot
Built for purchasing teams that need predictable dispatch, compliant documentation, and freight flexibility from parcel to full truckload.
| Procurement Advantage | Denatured Alcohol Proof A | Isopropyl Alcohol |
|---|---|---|
| Grade & Concentration Coverage | multiple concentration options by application with industrial/lab procurement support. | 91% 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 | Order by 1 PM CT (Mon-Thu) or noon CT Friday for same-business-day outbound from Taylor, TX. | Order by 1 PM CT (Mon-Thu) or noon CT Friday for same-business-day outbound from Taylor, TX. |
| 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 ready now; 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.
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Alliance Chemical supplies both Denatured Alcohol Proof A and Isopropyl Alcohol in various grades and package sizes.