SDA 3-C Denatured Ethanol
190 proof ethanol denatured with isopropyl alcohol — a versatile, lower-toxicity alternative to methanol-denatured formulas. Produced and denatured on-site in Marysville, Michigan from 100% Michigan-grown corn. Also coming soon in 200 proof.
What Is SDA 3-C?
SDA 3-C is a specially denatured alcohol formula authorized under 27 CFR Part 21: to every 100 gallons of ethanol, 5 gallons of isopropyl alcohol (IPA) are added. Because IPA is itself a common, well-understood solvent, SDA 3-C behaves predictably across a broad range of industrial applications while shipping exempt from federal excise tax.
Applications
🧷 Industrial Solvents
General-purpose solvent for manufacturing, thinning, and dilution across industrial processes.
🧼 Cleaning Products
Formulated cleaners and degreasers benefiting from a lower-toxicity denaturant package.
🎨 Coatings & Adhesives
Carrier for coatings, adhesives, and surface treatments.
⚗ Chemical Intermediates
Feedstock and process solvent for chemical manufacturing.
TTB Compliance
SDA 3-C requires a TTB industrial alcohol user permit to purchase. As a TTB-permitted DSP, Pristine Alcohol handles denaturing and documentation on-site and can assist customers with their own permit applications.
Frequently Asked Questions
What is SDA 3-C denatured with?
SDA 3-C is denatured by adding 5 gallons of isopropyl alcohol (IPA) to every 100 gallons of ethanol, per the TTB formula in 27 CFR Part 21.
Why choose SDA 3-C over SDA 3-A?
SDA 3-C uses isopropyl alcohol instead of methanol as the denaturant. Many manufacturers prefer it where methanol handling, toxicity, or residue is a concern.
Do I need a TTB permit to buy SDA 3-C?
Yes. Specially denatured alcohol requires a TTB industrial alcohol user permit. Our team assists with applications and compliance.
Is SDA 3-C available in 200 proof?
Yes — 200 proof SDA 3-C (under 0.5% water) is launching soon. Request a quote to reserve first-production allocation.