Undenatured (non-denatured) 190-proof ethanol is pure ethyl alcohol, about 95% alcohol by volume, with no denaturants added, so it is drinkable-grade spirit that carries federal excise tax unless it qualifies for a specific tax-free use. You need it when a denaturant would contaminate your product or violate a standard, such as in pharmaceutical, cosmetic, food-flavor, tincture, or laboratory work. Buying it takes more paperwork than buying denatured alcohol, and the price is driven by tax status, grade, packaging, and freight rather than by a single number.
What is non-denatured 190-proof ethanol?
Ethanol at 190 proof is 95% alcohol by volume, which is close to the ethanol-water azeotrope of about 95.6% ethanol by weight, the practical limit of ordinary distillation. “Non-denatured” or “undenatured” means nothing has been added to make it unfit for beverage use. Denatured grades such as SDA 40-B carry added denaturants (tert-butyl alcohol and denatonium benzoate) that make the alcohol unsuitable for drinking. Undenatured ethyl alcohol has none, which is exactly why it is regulated more tightly. Pristine Alcohol produces it from 100% Michigan corn in 100% stainless steel equipment in Marysville, Michigan, and lists it as 190-proof non-denatured ethanol.
For the full proof-versus-purity comparison, see our guide to 190 proof vs 200 proof ethanol.
When do you actually need undenatured ethanol?
Choose undenatured ethyl alcohol when the denaturant is the problem. Common cases include:
- Pharmaceutical and USP-grade work, where the monograph or formulation does not allow added denaturants.
- Food, flavor, and fragrance extracts, where the finished product is consumed or applied to the body and the alcohol must be free of denaturants.
- Botanical tinctures and extractions intended for ingestion.
- Laboratory and research use where denaturant peaks would interfere with analysis.
- Beverage-adjacent supply for licensed producers; see our 192-proof beverage-grade guide.
If your process tolerates a denaturant, a denatured grade is usually simpler to buy. Our SDA and CDA guide explains the options.
What paperwork does undenatured ethanol require?
Federal rules treat undenatured spirits as taxable distilled spirits. The federal excise tax on distilled spirits is $13.50 per proof gallon at the standard rate, with reduced rates under the Craft Beverage Modernization Act for qualifying producers. Whether you owe tax, and what documentation the seller needs from you, depends on your use:
| Your situation | Typical federal path |
|---|---|
| Manufacturer using alcohol in a product for sale (food, flavor, personal care) | Purchase tax-paid; the excise tax is included in the price. Keep invoices and use records. |
| Eligible institution using alcohol for non-beverage purposes (hospitals, educational organizations, scientific universities, certain laboratories, government bodies) | May qualify for tax-free alcohol under 27 CFR Part 22 with an Industrial Alcohol User permit (TTB Form 5150.9, after filing Form 5150.22). |
| Licensed beverage producer or other TTB-qualified premises | Governed by that operator’s own TTB permit and records. |
| Process that tolerates a denaturant | Consider a denatured grade, which has a different permit pathway; see our TTB permit guide. |
Under Part 22, “alcohol” is defined as spirits of 190 proof or more, and tax-free alcohol may not be used for beverage purposes or resold. State rules often add requirements, so confirm with your state alcohol agency and a qualified adviser. This article is general information, not legal or tax advice. The regulations are published at eCFR 27 CFR Part 22, and TTB’s tax-free alcohol guidance is at TTB.gov.
What drives the cost of non-denatured ethanol?
We do not quote prices in articles because they move with markets, but these are the factors that set them:
- Tax status. Tax-paid alcohol includes federal excise tax; tax-free sales to qualified users do not.
- Grade and documentation. USP, FCC, or kosher and non-GMO documentation add testing and paperwork.
- Packaging. A 55-gallon drum costs more per gallon to handle than a 275- or 330-gallon IBC tote, and a tank truck of roughly 5,000 to 6,500 gallons is the most efficient format.
- Freight and distance. Delivery from the plant is often a large share of landed cost.
- Corn and energy markets. Feedstock and natural gas costs flow through to ethanol pricing.
For how purchasing works end to end, read how to buy bulk ethanol.
190 proof or 200 proof: which should you buy?
If your specification calls for under 0.5% water, you need 200-proof ethanol. Otherwise 190 proof is the standard, more economical choice for extraction, tinctures, cosmetics, and most solvent work. Compare the grades on our 190-proof ethanol page.
Frequently asked questions
Is non-denatured ethanol legal to buy?
Yes, for lawful non-beverage and licensed uses, but it is taxable distilled spirits, so sellers document who is buying and why. Requirements vary by use and by state.
What is the difference between denatured and non-denatured ethanol?
Denatured alcohol has approved additives that make it unfit to drink and allow tax-free industrial use under TTB formulas. Non-denatured ethanol has no additives and is taxed as distilled spirits unless a tax-free exemption applies.
Can I use undenatured 190-proof ethanol for tinctures?
Yes, it is a common choice because it leaves no denaturant residue. Confirm that your intended product and sales channel are legal and properly labeled.
Does 190 proof ethanol need a permit for laboratory use?
Not always. Many labs buy tax-paid. Qualifying institutions can instead pursue tax-free alcohol under 27 CFR Part 22 with an Industrial Alcohol User permit.
Ready to source undenatured ethyl alcohol? Request a quote or visit our contact page.