[Code of Federal Regulations]
[Title 21, Volume 1]
[Revised as of April 1, 2007]
From the U.S. Government Printing Office via GPO Access
[CITE: 21CFR73.2500]
[Page 376-377]
TITLE 21--FOOD AND DRUGS
CHAPTER I--FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN
SERVICES
PART 73 LISTING OF COLOR ADDITIVES EXEMPT FROM CERTIFICATION--Table of
Subpart C Cosmetics
Sec. 73.2500 Silver.
(a) Identity. (1) The color additive, silver, is a crystalline
powder of high purity silver prepared by the reaction of silver nitrate
with ferrous sulfate in the presence of nitric, phosphoric and sulfuric
acids. Polyvinyl alcohol is used to prevent the agglomeration of
crystals and the formation of amorphous silver.
(2) Color additive mixtures of silver may contain only those
diluents listed in Sec. 73.1001(b) and, in addition, nitrocellulose.
[[Page 377]]
(b) Specifications. Silver shall conform to the following
specifications and shall be free from impurities other than those named
to the extent that such other impurities may be avoided by good
manufacturing practice:
Lead (as Pb), not more than 10 parts per million.
Arsenic (as As), not more than 5 parts per million.
Mercury (as Hg), not more than 1 part per million.
Silver (as Ag), not less than 99.9 percent.
(c) Uses and restrictions. The color additive silver may be safely
used for coloring fingernail polish at a level not to exceed 1 percent
of the final product.
(d) Labeling. The color additive and any mixtures prepared therefrom
intended solely or in part for coloring purposes shall bear, in addition
to any other information required by law, labeling in accordance with
the provisions of Sec. 70.25 of this chapter.
(e) Exemption from certification. Certification of this color
additive is not necessary for the protection of the public health and
therefore batches thereof are exempt from the certification requirements
of section 721(c) of the act.
[44 FR 65974, Nov. 16, 1979]
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