[Code of Federal Regulations]
[Title 21, Volume 3]
[Revised as of April 1, 2006]
From the U.S. Government Printing Office via GPO Access
TITLE 21--FOOD AND DRUGS
CHAPTER I--FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN
PART 184_DIRECT FOOD SUBSTANCES AFFIRMED AS GENERALLY RECOGNIZED AS
SAFE--Table of Contents
Subpart B_Listing of Specific Substances Affirmed as GRAS
Sec. 184.1428 Magnesium hydroxide.
(a) Magnesium hydroxide (Mg(OH)2, CAS Reg. No. 1309-42-8)
occurs naturally as the colorless, crystalline mineral brucite. It is
prepared as a white precipitate by the addition of sodium hydroxide to a
water soluble magnesium salt or by hydration of reactive grades of
(b) The ingredient meets the specifications of the Food Chemicals
Codex, 3d Ed. (1981), p. 178, which is incorporated by reference. Copies
are available from the National Academy Press, 2101 Constitution Ave.
NW., Washington, DC 20418, or available for inspection at the National
Archives and Records Administration (NARA). For information on the
availability of this material at NARA, call 202-741-6030, or go to:
(c) In accordance with Sec. 184.1(b)(1), the ingredient is used in
food with no limitation other than current good manufacturing practice.
The affirmation of this ingredient as generally recognized as safe
(GRAS) as a direct human food ingredient is based upon the following
current good manufacturing practice conditions of use:
(1) The ingredient is used as a nutrient supplement as defined in
Sec. 170.3(o)(20) of this chapter; a pH control agent as defined in
Sec. 170.3(o)(23) of this chapter; and a processing aid as defined in
Sec. 170.3(o)(24) of this chapter.
(2) The ingredient is used in foods at levels not to exceed current
good manufacturing practice.
(d) Prior sanctions for this ingredient different from the uses
established in this section do not exist or have been waived.
[50 FR 13559, Apr. 5, 1985, as amended at 64 FR 405, Jan. 5, 1999]
Additives that reference this regulation: