更多关于已证实属于一般公认为安全（GRAS）的可直接加入食品中的物质种类，请点击美国FDA 21 CFR 第184部分已证实属于一般公认为安全（GRAS）的可直接加入食品中的物质种类汇总
§ 184.1409 Ground limestone.
（a） Ground limestone consists essentially （not less than 94 percent） of calcium carbonate （CaCO3） and is prepared by the crushing, grinding, and classifying of naturally occurring limestone.
（b） The ingredient meets the specifications of the Food Chemicals Codex, 3d Ed. （1981）, p. 173, 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: http://www.archives.gov/federal_register/code_of_federal_regulations/ibr_locations.html.
（c） In accordance with §184.1（b）（1）, the ingredient is used in food with no limitation other than 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.
[48 FR 52442, Nov. 18, 1983]
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