Dimethyl dicarbonate (CAS Reg. No. 4525-33-1) may be safely used in

food in accordance with the following prescribed conditions:

(a) The additive meets the following specifications:

(1) The additive has a purity of not less than 99.8 percent as

determined by the following titration method:

with which it reacts quantitatively. The excess amine is backtitrated

with acid.

Method deleted

(2) The additive contains not more than 2,000 ppm (0.2 percent)

dimethyl carbonate as determined by a method entitled ``Gas

Chromatography Method for Dimethyl Carbonate Impurity in Dimethyl

Dicarbonate,'' whichis incorporated by reference in accordance with 5

U.S.C. 552(a). Copies are available from the Center for Food Safety and

Applied Nutrition (HFS-200), 200 C Street SW., Washington, DC 20204, or

available for inspection at the Office of the Federal Register, 800

North Capitol Street, NW., suite 700, Washington, DC 20408.

(b) The additive is used or intended for use as follows:

(1) Inhibitor of yeast in wine, dealcoholized wine, and low alcohol

wine, under normal circumstances of bottling where the viable yeast

count has been reduced to 500 per milliliter or less by current good

manufacturing practices such as flash pasteurization or filtration. The

additive may be added to wine, dealcoholized wine, or low alcohol wine in an amount not to exceed 200 parts per million (ppm).

(2) Inhibitor of yeast in ready-to-drink teas, under normal

circumstances of bottling or canning where the viable yeast count has

been reduced to 500 per milliliter or less by current good manufacturing

practices such as heat treatment, sterile filtration, or both. The

additive may be added to teas in an amount not to exceed 250 ppm.

(3) Inhibitor of yeast in carbonated or noncarbonated, nonjuice-

potassium ion (K+)). The additive may be added to the beverage in an

amount not to exceed 250 ppm.

(4) Inhibitor of yeast in carbonated, dilute beverages containing

percent. The additive may be added to the beverage in an amount not to

exceed 250 ppm.

(c) To ensure the safe use of the food additive, the label of the

package containing the additive shall bear, in addition to other

information required by the Federal Food, Drug, and Cosmetic Act:

(1) The name of the additive ``dimethyl dicarbonate.''

(2) Directions to provide that not more than 200 ppm of dimethyl

dicarbonate will be added to the wine, dealcoholized wine, or low

alcohol wine and not more than 250 ppm of dimethyl dicarbonate will be

added to the ready-to-drink tea or to the beverages described in parts

(b)(3) and (b)(4) of this section.

[53 FR 41329, Oct. 21, 1988, as amended at 58 FR 6091, Jan. 26, 1993; 59

FR 5319, Feb. 4, 1994; 61 FR 14245, Apr. 1, 1996; 61 FR 26788, May 29,

1996]