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Electronic Code of Federal Regulations

e-CFR data is current as of March 26, 2020

Title 27Chapter ISubchapter APart 19Subpart O → Subject Group


Title 27: Alcohol, Tobacco Products and Firearms
PART 19—DISTILLED SPIRITS PLANTS
Subpart O—Denaturing Operations and Manufacture of Articles


Rules for Denaturing Spirits and Testing Denaturants

§19.383   Gauging for denaturation.

(a) General. A proprietor must gauge spirits before denaturation and after denaturation and must record each gauge in the record of denaturation required by §19.606(b). However, a proprietor is not required to gauge either spirits that are dumped from previously gauged containers or spirits that are transferred directly to mixing tanks from gauge tanks where they were gauged. Measurements of spirits and denaturants may be made by volume, weight, accurate mass flow meter, or by any other device that has been approved by the appropriate TTB officer.

(b) Denaturation and article manufacture in a single process. When a proprietor both denatures spirits and manufactures articles in a single, unified process, the proprietor may, in place of the procedure specified in paragraph (a) of this section, gauge the spirits before and after denaturation in the following manner:

(1) Gauge the spirits to be denatured by volume, weight, accurate mass flow meter, or other device or method approved by the appropriate TTB officer;

(2) Gauge the denaturants to be used by volume, weight, accurate mass flow meter, or other device approved by the appropriate TTB officer; and

(3) Compute the number of wine gallons of denatured spirits produced, and enter this figure in the record required by §19.606(b). In calculating the amount of denatured spirits produced, the proprietor must not include in the calculation the amount of additional chemicals or denaturants used for article manufacture.

(26 U.S.C. 5204, 5241)

§19.384   Adding denaturants to spirits.

(a) When making denatured spirits, a proprietor must mix the denaturants and spirits only in packages, tanks or bulk conveyances and only on bonded premises. A proprietor must thoroughly mix the denaturants with the spirits to ensure that all of the spirits are effectively denatured.

(b) If a proprietor wishes to use another method of mixing denaturants and spirits not prescribed in this subpart, the proprietor must submit to the appropriate TTB officer a written application for approval of the alternative method in accordance with §19.27. TTB may require that the proprietor submit additional information, including a flow diagram or other graphic representation of the alternative method, in support of the application.

(26 U.S.C. 5242)

§19.385   Making alcohol or water solutions of denaturants.

If a proprietor uses a denaturant that is difficult to dissolve in spirits at normal working temperatures, that is highly volatile, or that becomes solid at normal working temperature, the proprietor may liquefy or dissolve the denaturant in a small amount of spirits or water prior to its use in the production of denatured spirits. However, the proof of the denatured spirits produced must not fall below the proof required by the approved formula. In addition, if alcohol is used as a solvent, the proprietor must include this additional alcohol in calculating the total quantity of spirits denatured in the batch.

(26 U.S.C. 5242)

§19.386   Adjusting pH of denatured spirits.

A proprietor may add trace amounts of acidic or caustic chemical compounds to adjust or neutralize the pH of denatured spirits. However, a proprietor may not adjust the pH with any substance that will counteract or reduce the effect of the denaturants. A proprietor who adjusts the pH of denatured spirits must keep a record of the adjustment with reference to the formula number of the treated denatured spirits. The record must include the kinds and quantities of chemical compounds used for each batch of denatured spirits treated.

(26 U.S.C. 5241, 5242)

§19.387   Ensuring the quality of denaturants.

(a) General. Proprietors must ensure that the materials they receive for use in denaturing conform to the specifications prescribed in part 21 of this chapter. In addition, the appropriate TTB officer may require that a proprietor test the quality of denaturants at any time.

(b) Testing. A proprietor must comply with the following when testing a lot of denaturants:

(1) Sampling denaturants. Proprietors must use good commercial practice when taking samples of denaturants for quality assurance testing. Samples of denaturants must be representative of the lot being sampled.

(2) Third party testing. A proprietor may employ an outside laboratory or other appropriate third party to test samples of denaturants. In the case of a third party test, the proprietor must obtain a copy of the analysis or statement of findings signed by the chemist who performed the test. On request, the proprietor must provide to the appropriate TTB officer samples of denaturants for quality control testing in a Government laboratory.

(c) Substandard denaturants. If TTB or a proprietor finds that a material does not conform to the specifications for a denaturant prescribed in part 21 of this chapter, the proprietor must immediately terminate use of the substandard material as a denaturant. However, the proprietor may continue to use the material as a denaturant after treating or reprocessing the substandard material to correct the deficiency and bring the material into conformity with the applicable specifications.

(26 U.S.C. 5242)

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