Chrome Diagnostics completely denatured ethyl alcohol formula 12A-1 consists of 200 proof USP grade anhydrous ethyl alcohol denatured with high purity N-Heptane according to 27 CFR part 21.

CDA 12A is typically used during the plant extraction process as a solvent and during the winterization / purification process assisting in the removal of fats and oils. This is an industry standard ethanol blend that has zero federal excise tax. Because n-Heptane has a higher boiling point than ethanol, it may be necessary to heat the evaporator to a higher temperature (+5-10° C). This product is not intended for human consumption.

All Completely Denatured Alcohol (CDA) is subject to TTB regulation
Shipments do not require any permit or approval from the TTB, but must be for an approved formula and for the uses allowed by 27 CFR 20.141. Please see the TTB's site on Completely Denatured Alcohol for more details. This product has no federal excise tax. Please see the TTB's site on Completely Denatured Alcohol for more details.

For more information about CDA 12A, see our blog post here.

Intermediate bulk container with metallic barrels, 3D rendering isolated on white background



Plant oil extraction, winterization, processing solvent

Common Names
Denatured alcohol, denatured ethanol, denatured ethyl alcohol, cda12, cda12a, cda 12a, cda 12a-1, completely denatured alcohol with n heptane

Chemical Formula(s)
Ethanol C2H6O
N-Heptane C7H16
Ethanol 64-17-5
Pounds per Gallon
Melting Point
-143.99 degrees C (-227.18 degrees F)
Boiling Point
78-80 degrees C (172.4 - 176.0 degrees F)
Flash Point
14 degrees C (57.2 degrees F)
Vapor Pressure
59.5 hPa at 20 degrees C (68.0 degrees F)

CDA 12A safety information

Risk factors
Toxic by inhalation. Flammable, dangerous fire risk. TLV: 400 ppm in air.

Hazard Statement
Keep away from heat, sparks, open flames, and hot surfaces. No smoking. Keep container tightly closed. Ground/bond container and receiving equipment. Use explosion-proof electrical, ventilating, and lighting equipment. Use only non-sparking tools. Take precautionary measures against static discharge. Wash hands thoroughly after handling. Wear protective gloves and eye and face protection. IF ON SKIN (or hair): Remove immediately all contaminated clothing. Rinse skin with water. IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. Seek medical attention. If eye irritation persists: get medical attention. If medical advice is needed, have product container or label at hand. Keep out of reach of children.

NFPA Hazard Classification
Health: 2 (Moderate) Materials that, on intense or continued (but not chronic) exposure, could cause temporary incapacitation or possible residual injury, including those requiring the use of respiratory protective equipment that has an independent air supply. These materials are hazardous to health, but areas may be entered freely if personnel are provided with full-face mask self-contained breathing apparatus that provides complete eye protection. Flammability: 3 (Serious) This degree includes Class IB and IC flammable liquids and materials that can be easily ignited under almost all normal temperature conditions. Water may be ineffective in controlling or extinguishing fires in such materials. Instability: 0 (Minimal) This degree includes materials that are normally stable, even under fire exposure conditions, and that do not react with water. Normal fire fighting procedures may be used.

Signal Word
Environmentally Damaging
Category 2
Acute Aquatic Toxicity
Category 2
Flammable liquids
Category 2
Aspiration Toxicity
Category 1
Skin Corrosion / Irritation
Category 2
Eye Irritation
Category 2B
Specific target organ toxicity (single exposure)
Category 3


CDA 12A UN Number - UN1987
Proper Shipping Name Alcohols, n.o.s. (Ethanol, n-Heptane)
Hazard Class 3
Packing Group II

UN-No UN1987
Proper Shipping Name Alcohols, n.o.s. (Ethanol, n-Heptane)
Hazard Class 3
Packing Group II

Proper Shipping Name Alcohols, n.o.s. (Ethanol, n-Heptane)
Hazard Class 3
Packing Group II

Proper Shipping Name Alcohols, n.o.s. (Ethanol, n-Heptane)
Hazard Class 3
Packing Group II
Marine pollutant: Yes

Per DOT regulations, these drums & totes must be transported straight-up and safely tied down.
Please DO NOT transport the drum on its side as this is a highly flammable product and they can leak if transported horizontally.