21 CFR 73.3115 - 2-[[2,5-Diethoxy-4-[(4-methylphenyl)thiol]phenyl]azo]-1,3,5-benzenetriol.

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§ 73.3115 2-[[2,5-Diethoxy-4-[(4-methylphenyl)thiol]phenyl]azo]-1,3,5-benzenetriol.
(a) Identity. The color additive2-[[2,5-diethoxy-4-[(4-methylphenyl)thio]phenyl]azo]-1,3,5-benzenetriol is formed in situ in soft (hydrophilic) contact lenses.
(b) Uses and restrictions. The color additive 2-[[2,5-diethoxy-4-[(4-methylphenyl)thio]phenyl]azo]-1,3,5-benzenetriol may be safely used to mark soft (hydrophilic) contact lenses with the letter R or the letter L for identification purposes subject to the following restrictions:
(1) The quantity of the color additive does not exceed 1.1×10−7 grams in a soft (hydrophilic) contact lens.
(2) When used as specified in the labeling, there is no measurable migration of the color additive from the contact lens to the surrounding ocular tissue.
(3) Authorization for this use shall not be construed as waiving any of the requirements of section 510(k) and 515of the Federal Food, Drug, and Cosmetic Act with respect to the contact lens in which the color additive is used.
(c) Labeling. The label of the color additive shall conform to the requirements of § 70.25 of this chapter.
(d) Exemption from certification. Certification of this color additive is not necessary for the protection of the public health, and therefore the color additive is exempt from the certification requirements of section 721(c) of the act.
[48 FR 22706, May 20, 1983]

Title 21 published on 2013-04-01

The following are only the Rules published in the Federal Register after the published date of Title 21.

For a complete list of all Rules, Proposed Rules, and Notices view the Rulemaking tab.

  • 2014-04-11; vol. 79 # 70 - Friday, April 11, 2014
    1. 79 FR 20095 - Listing of Color Additives Exempt From Certification; Spirulina Extract
      GPO FDSys XML | Text
      DEPARTMENT OF HEALTH AND HUMAN SERVICES, Food and Drug Administration
      Final rule.
      This rule is effective May 13, 2014. See section X for further information on the filing of objections. Submit either electronic or written objections and requests for a hearing by May 12, 2014.
      21 CFR Part 73

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United States Code

Title 21 published on 2013-04-01

The following are ALL rules, proposed rules, and notices (chronologically) published in the Federal Register relating to 21 CFR 73 after this date.

  • 2014-04-11; vol. 79 # 70 - Friday, April 11, 2014
    1. 79 FR 20095 - Listing of Color Additives Exempt From Certification; Spirulina Extract
      GPO FDSys XML | Text
      DEPARTMENT OF HEALTH AND HUMAN SERVICES, Food and Drug Administration
      Final rule.
      This rule is effective May 13, 2014. See section X for further information on the filing of objections. Submit either electronic or written objections and requests for a hearing by May 12, 2014.
      21 CFR Part 73