# Resinous and polymeric coatings for polyolefin films.
**AGENCY:**
Food and Drug Administration, HHS.
**ACTION:**
Final rule; technical amendment.
**SUMMARY:**
The Food and Drug Administration (FDA) is amending its food additives regulations to correct two typographical errors in the Chemical Abstracts Service (CAS) registry number. This document corrects those errors.
**DATES:**
This rule is effective June 13, 2000.
**FOR FURTHER INFORMATION CONTACT:**
Julius Smith, Center for Food Safety and Applied Nutrition (HFS-215), Food and Drug Administration, 200 C St. SW., Washington, DC 20204, 202-418-3091.
**SUPPLEMENTARY INFORMATION:**
In the *Federal Register* of February 11, 2000 (65 FR 6889), the agency amended the food additive regulations to provide for the safe use of: (1) 1,2-dibromo-2,4-dicyanobutane, and (2) a mixture of 5-chloro-2-methyl-4-isothiazolin-3-one and 2-methyl-4-isothiazolin-3-one, optionally containing magnesium nitrate, as antimicrobial agents in emulsion-based silicone coating formulations. The CAS registry number for 2-methyl-4-isothiazol-3-one was incorrectly published. The agency is amending both 21 CFR 175.300 and 175.320 to correct those errors.
**List of Subjects in 21 CFR Part 175**
Adhesives, Food additives, Food packaging.
**21 CFR Part 175**
Therefore, under the Federal Food, Drug, and Cosmetic Act and under authority delegated to the Commissioner of Food and Drugs, 21 CFR part 175 is amended as follows:
**PART 175—INDIRECT FOOD ADDITIVES: ADHESIVES AND COMPONENTS OF COATINGS**
1. The authority citation for 21 CFR part 175 continues to read as follows:
**Authority:**
21 U.S.C. 321, 342, 348, 379e.
**21 CFR Part 175**
§ 175.300
2. Section 175.300 *Resinous and polymeric coatings* is amended in paragraph (b)(3)(xxxiii), under the entry “5-Chloro-2-methyl * * *”, by removing “(CAS Reg. No. 2628-20-4)” and adding in its place “(CAS Reg. No. 2682-20-4)”.
**21 CFR Part 175**
3. Section 175.320 is amended in the table in paragraph (b)(3) by revising the entry under item (iii) for “5-Chloro-2-methyl-4-isothiazolin-3-one” under the headings “List of substances” and “Limitations” to read as follows:
§ 175.320
(b) * * *
(3) * * *
| List of substances | Limitations |
| --- | --- |
| * * * * * * * | |
| (iii) Adjuvants (release agents, waxes, and dispersants): | |
| * * * * * * * | |
| 5-Chloro-2-methyl-4-isothiazolin-3-one (CAS Reg. No. 26172-55-4) and 2-methyl-4-isothiazolin-3-one (CAS Reg. No. 2682-20-4) mixture, at a ratio of 3 parts to 1 part, respectively, manufactured from methyl-3-mercaptopropionate (CAS Reg. No. 2935-90-2) and optionally containing magnesium nitrate (CAS Reg. No. 10377-60-3) at a concentration equivalent to the isothiazolone active ingredients (weight/weight). | For use only as an antimicrobial agent in emulsion-based silicone coatings at a level not to exceed 50 milligrams per kilogram (based on isothiazolone active ingredient) in the coating formulation. |
| * * * * * * * | |
Dated: June 7, 2000.
William K. Hubbard,
Senior Associate Commissioner for Policy, Planning, and Legislation.