Product Overview
Denatured Alcohol 190 Proof 3A is a high-purity industrial solvent and reagent designed for demanding manufacturing and processing environments. Comprising ethyl alcohol denatured with a specific minor portion of methanol in accordance with the 3A formulation, this mixture is rendered completely unfit for beverage use while retaining the critical chemical properties required for industrial applications. As a key solvent in our Alcohols collection, this product is managed with strict quality controls to ensure consistency across every batch, meeting the high standards required by commercial operators.
This technical-grade liquid behaves dynamically as an extraction agent, chemical intermediate, and cleaning solvent across multiple sectors. Due to its denatured status, it is exempt from Federal excise taxes on beverage alcohol, allowing facilities to purchase and utilize high-purity ethanol cost-effectively. Alliance Chemical distributes this product in multiple volume options to accommodate varying production scales, ensuring that your facility receives a reliable supply of technical raw materials with comprehensive compliance documentation, including a Safety Data Sheet (SDS) provided with every order to support safe handling practices.
Why This Grade
Selecting the 190 Proof 3A grade is critical for processes that require a balanced moisture profile without the extreme dryness or high cost of anhydrous 200 proof alcohol. The 190-proof designation indicates a water content of approximately 5% by volume, which is ideal for industrial processes where minor water presence is tolerated or even necessary, such as in certain coatings, inks, and extraction workflows. Choosing this specific 3A formulation ensures that the denaturant—methanol—is appropriate for your reaction chemistry, preventing side reactions that occur when other denaturing agents, like heptane or methyl isobutyl ketone, are introduced into sensitive chemical systems.
Utilizing an incorrect grade or proof of denatured alcohol can lead to catastrophic process failures. For instance, using a fully denatured formulation with complex hydrocarbon denaturants in a high-precision coating process can cause surface defects, improper adhesion, or haziness in the finished film. Conversely, using a 200-proof anhydrous grade when a 190-proof grade is sufficient represents an unnecessary operational expense, as maintaining anhydrous conditions requires specialized, energy-intensive storage. By choosing Denatured Alcohol 190 Proof 3A, operators balance cost-efficiency with high chemical performance, ensuring that their manufacturing lines maintain rigorous quality standards without expensive solvent-induced failure modes.
Chemical Profile
- CAS Number
- 64-17-5
- Chemical Formula
- C2H6O
- Molecular Weight
- 46.07 g/mol
- Boiling Point
- 173.3 °F at 760 mmHg (NTP, 1992)
- Melting Point
- -173.4 °F (NTP, 1992)
- Flash Point
- 55 °F (NTP, 1992)
- Specific Gravity
- 0.79 at 68 °F (USCG, 1999) - Less dense than water; will float
- Appearance
- Ethanol with a small amount of an adulterant added so as to be unfit for use as a beverage.
- Solubility
- greater than or equal to 100 mg/mL at 73 °F (NTP, 1992)
- UN Number
- UN1987
- Hazard Class
- Class 3
- Packing Group
- II
- Proper Shipping Name
- Alcohols, n.o.s. (Ethyl alcohol, methanol)
- GHS Signal Word
- DANGER
Values sourced from Alliance Chemical's canonical chemistry registry. Certificate of Analysis (COA) per lot.
Industrial Applications
- Fuel and fuel additive blending where precise moisture tolerance and ethanol purity are mandatory for combustion performance standards.
- Industrial solvent coatings and wood finishes requiring controlled evaporation rates and clean, residue-free drying profiles during application processes.
- Chemical synthesis intermediates where the 3A denatured formulation provides a stable reagent without interfering with primary organic reactions.
- Laboratory solvent washes and glassware cleaning agents that require a highly soluble fluid capable of dissolving complex polar and non-polar residues.
- Adhesive and sealant formulation manufacturing where the 190-proof alcohol serves as a carrier solvent to maintain optimal fluid viscosity.
Hazmat & Shipping
Denatured Alcohol 190 Proof 3A is classified as a hazardous material for transport. It is regulated under United States Department of Transportation (DOT) regulations as UN1987, Hazard Class 3, Packing Group II. The proper shipping name is Alcohols, n.o.s. (Ethyl alcohol, methanol). Given its highly flammable nature, transport and storage must comply with all local, state, and federal regulations governing Class 3 flammable liquids. The assigned Signal Word for this product is DANGER, indicating severe hazards associated with flammability and potential toxicity from the denaturing agent.
Because this chemical carries the Hazard Statement H225 (Highly flammable liquid and vapor), strict adherence to safety protocols is mandatory. No GHS pictograms are specified in the authoritative hazard classification for this SKU, but operators must still implement robust risk mitigation strategies. This includes wearing appropriate personal protective equipment (PPE) such as flame-retardant clothing, chemical-resistant gloves, and eye protection during any transfer operations. To assist with compliance, a detailed Safety Data Sheet (SDS) is provided with every order, outlining specific protective guidelines to safeguard personnel and prevent industrial incidents in the workplace.
Handling & Storage
Proper handling and storage of Denatured Alcohol 190 Proof 3A are essential to prevent dangerous vapor accumulation and container degradation. Store this fluid in a cool, well-ventilated area, ideally between 50 °F and 80 °F, away from direct sunlight, heat, sparks, open flames, and other ignition sources. Keep containers tightly closed when not in use. This product is compatible with high-density polyethylene (HDPE), stainless steel, and carbon steel containers, but operators should avoid contact with strong oxidizing agents, acids, and alkali metals, which can react violently with the ethanol or denaturant.
Order & Documentation
Alliance Chemical is dedicated to providing high-quality chemical distribution services with complete transparency. We offer various packaging options, from 1-quart bottles to multi-gallon bulk cases, to fit your exact operational requirements. A Certificate of Analysis (COA) is available upon request for every batch we ship, allowing your quality control team to verify compliance with technical specifications. To secure your supply or to learn more about our logistics capabilities, please Request a Quote or Download the SDS today.
Why Buy from Alliance Chemical
Since 1997, Alliance Chemical has supplied premium industrial chemicals from Taylor, Texas under CAGE Code 1LT50, with a COA and SDS included on every order. For industrial use only.
