Embalming fluid is made with specially denatured alcohol (SDA) Formula 3-C — ethyl alcohol denatured with five gallons of isopropyl alcohol for every 100 gallons of alcohol. The Alcohol and Tobacco Tax and Trade Bureau (TTB) expressly authorizes SDA 3-C for use code 420, “Embalming fluids and related products,” at 27 CFR 21.37. SDA 3-A carries the same 420 authorization but is denatured with cyclohexane or methyl alcohol, which most mortuary chemical formulators avoid. Either way, a manufacturer must hold an Industrial Alcohol User Permit before the first drum ships.
Why embalming fluid contains alcohol at all
Formaldehyde does the preserving. Ethanol does the delivering. Ethyl alcohol is fully miscible with water and dissolves the dyes, humectants, surfactants and buffering agents that a modern arterial fluid carries, so it acts as the carrier that moves the whole formulation through tissue evenly instead of letting components drop out of solution. It also contributes antimicrobial action of its own. Published arterial-fluid formulations vary widely in strength, with alcohol content reported anywhere from under 10 percent to more than 50 percent by volume depending on whether the product is an arterial, cavity, or accessory fluid.
Because the alcohol is a functional solvent rather than a beverage, it is denatured — rendered unfit to drink — so the manufacturer avoids the federal excise tax on distilled spirits, which runs $13.50 per proof gallon at the standard rate. Denaturing is what makes industrial-scale mortuary chemistry economically possible.
SDA 3-C: the grade authorized for embalming fluids
Under 27 CFR 21.37, Formula No. 3-C is ethanol with five gallons of isopropyl alcohol added per 100 gallons. That single denaturant is the reason the grade dominates this application: isopropyl alcohol is chemically similar to ethanol, does not interfere with formaldehyde chemistry, and is far less toxic than methanol to the embalmer handling the product in a prep room.
The authorized-use list at 21.37(b)(1) includes 420 (embalming fluids and related products) alongside 430 (sterilizing and preserving solutions) and 410 (disinfectants and other biocides) — the three codes a mortuary chemical manufacturer is most likely to need on a single permit. SDA 3-C denatured ethanol is available in both 190 proof and 200 proof base alcohol.
One limitation worth knowing: 27 CFR 21.37(c) forbids using Formula 3-C to manufacture reagent alcohol under the general-use formula in 27 CFR 20.117. If your plant also makes reagent alcohol, that product has to come off a different grade.
SDA 3-A is authorized too — so why is 3-C the default?
Formula No. 3-A, defined at 27 CFR 21.35, is ethanol with five gallons of cyclohexane or methyl alcohol per 100 gallons, and its authorized-use list also includes code 420. Regulatory eligibility is identical. The decision is a chemistry and safety decision, not a compliance one.
| Grade | Denaturant per 100 gal ethanol | Use 420 authorized? | TTB user permit required? | Fit for embalming fluid |
|---|---|---|---|---|
| SDA 3-C | 5 gal isopropyl alcohol | Yes (27 CFR 21.37) | Yes | Industry default — mild, ethanol-like denaturant |
| SDA 3-A | 5 gal cyclohexane or methyl alcohol | Yes (27 CFR 21.35) | Yes | Eligible, but methanol raises prep-room exposure concerns |
| CDA 12-A | 5 gal toluene or 5 gal heptane | Not applicable — CDA is not use-coded | No | Hydrocarbon denaturant and odor make it a poor fit |
| Non-denatured 190/200 proof | None | Not applicable | Tax-paid or tax-free permit | Legal but carries full excise tax burden |
We break the two grades down side by side in SDA 3-A vs SDA 3-C.
What about CDA 12-A?
Completely denatured alcohol Formula 12-A is ethanol with five gallons of toluene or five gallons of heptane per 100 gallons. Its appeal is procedural: CDA is not tied to the authorized-use codes in Part 21 Subpart D and does not require an industrial alcohol user permit, so buyers can order it without a TTB application. For embalming chemistry, though, the hydrocarbon denaturant brings odor and a solvency profile that does not belong in a product applied to human remains in an enclosed prep room. CDA 12-A is the right answer for cleaning and general solvent work, not for arterial fluid.
The TTB permit you need before you can buy SDA
Specially denatured spirits are controlled under 27 CFR Part 20. Before withdrawing, using or dealing in SDA, a manufacturer files TTB Form 5150.22, Application for an Industrial Alcohol User Permit, and lists the authorized use codes it intends to operate under — 420 for embalming fluids. No supplier can legally ship SDA 3-C against a permit that does not carry the matching code, so get 420 on the application the first time rather than amending later. Our guide to TTB permits for denatured alcohol walks through the filing.
Proof, purity and packaging for mortuary chemical manufacturers
SDA 3-C is supplied on either a 190 proof or a 200 proof base. 190 proof sits near the ethanol-water azeotrope of roughly 95.6 percent ethanol by weight, which is the practical ceiling for simple distillation and is entirely adequate when the finished fluid will be diluted with water anyway. 200 proof is dehydrated past that point to under 0.5 percent water, and is specified when residual water would interfere with a moisture-sensitive component or when a formulator wants full control of the final water content. Ethanol’s solvent behavior — including complete miscibility with water — is documented in the PubChem entry for ethanol, CID 702. See 190 proof ethanol for base-grade specifications.
Volume follows the plant. Bulk buyers take tank trucks of roughly 5,000 to 6,500 gallons; mid-volume compounders run 275 or 330 gallon IBC totes; smaller or specialty batches move in 55 gallon drums. Pristine Alcohol produces from 100 percent Michigan corn in 100 percent stainless steel equipment at our Marysville, Michigan facility, which keeps trace metal and plasticizer pickup out of the finished alcohol — a real concern when the fluid will sit in contact with dyes and preservatives for months.
Frequently asked questions
Can I use SDA 3-A instead of SDA 3-C for embalming fluid?
Yes. Both formulas list authorized use code 420 for embalming fluids and related products. The practical difference is the denaturant: 3-A uses cyclohexane or methyl alcohol, 3-C uses isopropyl alcohol. Most mortuary chemical manufacturers choose 3-C because isopropyl alcohol poses less inhalation and absorption risk to the embalmer than methanol.
Do I need a TTB permit to buy SDA 3-C?
Yes. Specially denatured alcohol requires an Industrial Alcohol User Permit obtained on TTB Form 5150.22, and the permit must list the authorized use code covering your product. There is no permit-free route to SDA of any formula.
What proof of ethanol goes into embalming fluid?
Both 190 proof and 200 proof are used as the base for SDA 3-C. 190 proof is the common choice because the finished fluid is water-based; 200 proof is specified when the formulation is moisture-sensitive or the manufacturer needs exact control of final water content.
Is completely denatured alcohol acceptable for embalming fluid?
CDA 12-A can be purchased without a TTB user permit, but its toluene or heptane denaturant introduces odor and hydrocarbon residue that are inappropriate in a product used on human remains. SDA 3-C is the grade the industry specifies.
How is embalming-grade ethanol shipped?
In 55 gallon drums, 275 or 330 gallon IBC totes, and tank trucks of approximately 5,000 to 6,500 gallons. Denatured ethanol is a flammable liquid and ships under the corresponding DOT hazard class, so receiving sites need appropriate flammable-liquid storage.
Sourcing SDA 3-C for mortuary chemical production
If you manufacture arterial, cavity or accessory fluids and need a consistent SDA 3-C supply on a 190 or 200 proof base, request a quote for bulk ethanol or reach us through the Pristine Alcohol contact page. Tell us your authorized use codes and container format and we will confirm grade, proof and lead time.