Product Overview
Denatured Alcohol 190 Proof 3C is ethanol rendered unfit for beverage use by the addition of a denaturant, classified under CAS 64-17-5 (molecular formula C2H6O, molecular weight 46.07). At 190 proof, this product delivers 95% ethanol by volume — a high concentration suited to solvent-intensive industrial and lab processes where beverage-grade alcohol is unnecessary and federally regulated.
This technical-grade denatured alcohol serves extraction operations, surface cleaning, equipment degreasing, and general lab reagent work. It is available to order from Alliance Chemical in sizes ranging from 1-quart bottles to 330-gallon totes, covering everything from bench-scale trials to continuous production runs.
Why This Concentration
The 190 proof designation means 95% ethanol by volume — close to the azeotropic limit of ethanol-water mixtures. For buyers running solvent extractions or using denatured alcohol as a mobile phase component, this concentration minimizes the water fraction without requiring anhydrous (200 proof) processing, which carries a higher price point and stricter storage demands.
The "3C" formula designation identifies the specific denaturing method. Because the denaturant renders the product non-potable, it falls outside beverage alcohol excise taxes, making it a cost-effective ethanol source for industrial solvent applications. When evaluating this product, confirm that the 3C denaturant is compatible with your downstream process and purity requirements — certain analytical or extraction workflows may require a different denaturing formula.
Chemical Profile
Denatured Alcohol 190 Proof 3C is a liquid with a pleasant odor, described as ethanol with a small amount of an adulterant added so as to be unfit for use as a beverage. Its density is 0.79 at 68 °F — less dense than water and will float on aqueous surfaces. The product is highly soluble in water (≥100 mg/mL at 73 °F) and exhibits significant vapor pressure: 40 mmHg at 66 °F, rising to 50 mmHg at 77 °F. That volatility is why ventilation matters in any workspace where this solvent is open to atmosphere. The molecular formula is C2H6O with a molecular weight of 46.07 and CAS number 64-17-5.
Industrial Applications
Denatured Alcohol 190 Proof 3C functions as a workhorse solvent across several sectors:
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Solvent for extraction — Used to extract active compounds from plant materials and other matrices. The high ethanol concentration provides strong solvency for a wide range of organic compounds while remaining miscible with water, which simplifies downstream separation steps.
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Industrial cleaning and degreasing — Dissolves oils, greases, and residues from manufacturing equipment and surfaces. Evaporates cleanly at ambient temperatures, leaving minimal residue behind.
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Lab reagent — Serves as a general-purpose solvent and reagent in analytical and preparative lab work, including use as a mobile phase component in liquid chromatography separations.
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Fuel additive — Blended into fuel formulations where ethanol content contributes to combustion characteristics.
Handling & Storage
This product carries a GHS signal word of Danger (per the product's GHS classification). Two hazard statements govern its handling:
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H225 — Highly flammable liquid and vapour (per the product's GHS classification)
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H319 — Causes serious eye irritation (per the product's GHS classification)
Store in a cool, well-ventilated area, away from heat sources, open flames, and strong oxidizers. Use containers made of HDPE or glass. Keep containers sealed when not in use — at a vapor pressure of 40–50 mmHg near room temperature, this solvent evaporates readily and can build flammable vapor concentrations in enclosed spaces. Wear chemical splash goggles and compatible gloves during handling. Ground and bond containers during transfer to prevent static discharge.
Hazmat & Shipping
Denatured Alcohol 190 Proof 3C is regulated for transport as a hazardous material. The governing classification:
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UN Number: UN1987 (per 49 CFR 172.101)
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Hazard Class: 3 — Flammable Liquid (per 49 CFR 172.101)
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Packing Group: II (per 49 CFR 172.101)
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Proper Shipping Name: Alcohols, n.o.s. (Ethyl alcohol, isopropyl alcohol) (per 49 CFR 172.101)
All shipments from Alliance Chemical comply with DOT packaging, marking, and labeling requirements for Class 3/PG II materials. Shipping documentation accompanies every hazmat shipment.
Documentation
A Safety Data Sheet (SDS) ships with every order, available in English, Spanish, French, and Japanese. A Technical Data Sheet (TDS) is also available for this product. Lot-specific Certificates of Analysis (COA) can be requested to verify batch characteristics for your quality or receiving records.
Why Buy from Alliance Chemical
Denatured Alcohol 190 Proof 3C is available to order in pack sizes from 1-quart bottles through 330-gallon totes — whether you need a quart for lab work or drum quantities for a production line, the packaging range matches your actual consumption. Alliance Chemical has served over 50,000 customers since 1998, and every product page and shipment is reviewed by Andre Taki, DOT Hazmat Specialist, to ensure transport classification and documentation are correct before your order leaves our Taylor, TX facility.
