Section 186.1256 - Clay (kaolin)(a) Clay (kaolin) Al2O3.2SiO2.nH2O, Cas Reg. No. 1332-58-7) consists of hydrated aluminum silicate. The commercial products of clay (kaolin) contain varying quantities of alkalies and alkaline earths. Clay (kaolin) is a white to yellowish or grayish fine powder. There are at least three different minerals, kaolinite, dickite, and nacrite, classified as kaolin. Kaolinite or china clay is whiter, less contaminated with extraneous minerals, and less plastic in water.(b) In accordance with § 186.1(b)(1) , the ingredient is used as an indirect human food ingredient with no limitation other than current good manufacturing practice. The affirmation of this ingredient as generally recognized as safe (GRAS) as an indirect human food ingredient is based upon the following current good manufacturing practice conditions of use:(1) The ingredient is used in the manufacture of paper and paperboard that contact food.(2) The ingredient is used at levels not to exceed current good manufacturing practice.(c) Prior sanctions for this ingredient different from the uses established in this regulation do not exist or have been waived.47 FR 43367, Oct. 1, 1982