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Chapter 24: Food and Color Additives

Updated: 08/30/07


Potential Food Safety Hazard Contents
Certain food and color additives can cause an allergic-type reaction (food intolerance) in consumers. Examples of such food and color additives that are used on fish and fishery products include: sulfiting agents and FD&C Yellow #5. Sulfiting agents are mostly used during on-board handling of shrimp and lobster to prevent the formation of "black spot." They are sometimes used by cooked octopus processors as an antioxidant, to retain the red color of the octopus skin. FD&C Yellow #5 is used during in-plant processing. These food and color additives are permitted for use in foods, with certain restrictions, but their presence must be declared on the label. This label declaration is particularly important to sensitive individuals.

Certain other food and color additives are prohibited from use in food because of a determination by FDA that they present a potential risk to the public health. Examples of such food and color additives include: safrole and FD&C Red #4.

Additionally, a number of foods contain allergenic proteins that can pose a health risk to certain sensitive individuals. Appendix 6 contains a list of such foods that account for most of all food allergies. While the controls in this chapter are not directly applicable to the hazard of allergenic proteins, if these foods are part of or are directly added to your fishery product, you may use the principles contained in this chapter to ensure that the product is properly labeled. However, these controls are not designed to prevent the unintentional introduction of allergenic proteins from such foods into your fishery product because of cross-contact (e.g. use of common equipment, improper production scheduling, or improper use of rework material). Unintentional introduction of allergenic proteins must be controlled through a rigorous sanitation regime, either as part of a prerequisite program or as part of HACCP itself. The Seafood HACCP Regulation requires such a regime (FDA, 2001).

Control Measures Contents
Control measures for allergic-type reactions that can result from the presence of certain food and color additives (e.g. sulfiting agents and FD&C yellow #5) could include:
  • Declaring the presence of food and color additives that can cause an allergic-type reaction on finished product labeling;

  • Testing incoming shrimp or lobster for residues of sulfiting agents at or above 10 ppm;

  • Receiving a supplier's certification of the lack of sulfiting agent use on incoming lots of shrimp or lobster (with appropriate verification – see Step #18);
  • Reviewing the labeling (or accompanying documents, in the case of unlabeled product) on shipments of shrimp or lobster received from another processor for the presence of a sulfiting agent declaration

A control measure for the presence of prohibited food and color additives could include:

  • Testing incoming lots of fish for the presence of prohibited food and color additives which there is reason to believe may be present.

  • Receiving a supplier's certification that prohibited food and color additives were not used on the incoming lot of fish (with appropriate verification) (FDA, 2001).
FDA Guidelines Contents
FDA guidelines for food and color additives in fish and fishery products.

Food Additive

Guideline

Reference

Cyclamate and its derivatives, safrole, FD&C Red #4, and other prohibited food and color additives

Incoming lots of fish and fishery products must not contain a detectable level of prohibited food and color additives; or

Incoming lots fish and fishery products must be accompanied by a supplier's lot-by-lot certificate that prohibited food and color additives were not used.

FDA, 2001

Sulfiting agents

All finished product labels must contain a sulfiting agent declaration; or

Incoming lots of fish and fishery products must not contain a detectable level of sulfite; or

Incoming lots of fish and fishery products must be accompanied by a supplier's lot-by-lot certificate that sulfiting agents were not used; or

Finished product labels for product processed from sulfite-containing raw materials must contain a sulfiting agent declaration.

FDA, 2001

FD&C Yellow #5

All finished product labels must contain a FD&C Yellow #5 declaration; or

Incoming lots of fish and fishery products must not contain a detectable level of FD&C Yellow #5; or

Incoming lots of fish and fishery products must be accompanied by a supplier's certificate that FD&C Yellow #5 was not used; or

Finished product labels for product processed from FD&C Yellow #5-containing raw materials must contain a FD&C Yellow #5 declaration.

FDA, 2001

Astaxanthin

All finished product labels for salmonid fish fed astaxanthin to enhance the pink to orange-red color of the flesh must contain an astaxanthin declaration.

21 CFR 73.35

Canthaxanthin

All finished product labels for salmonid fish fed canthaxanthin to enhance the pink to orange-red color of the flesh must contain a canthaxanthin declaration.

21 CFR 73.75

Analytical Procedures Contents
Sulfiting agents Contents
  • Sulfites in foods, Optimized Monier-Williams method (AOAC, 1995a).
  • EM Quant Sulfitest Strips (Center Laboratories, Port Washington, New York; Nordlee et al., 1988).
  • Ion chromatography (Cooper et al., 1985; Cooper et al., 1986).
  • Alkali titration method (Yamagata and Low, 1992a).
  • Colorimetric method (Yamagata and Low, 1992b).
  • Determination of sulphites and borates in imported frozen prawns, frozen shrimps and salted jellyfish (Ogawa et al., 1978).
  • Comparison of sulfite methods (DeWitt and Finne, 1985).
Commercial Test Products
Disclaimer Clause
Contents
Commercial test products for sulfites.

Test 

Analytical

Technique

Approx. Total

Test Time

Supplier

Alert for Sulfites 
[identifies sulfite level in ppm]

chemical reaction with color change indicator

< 2 min

Neogen Corporation 
Contact: Jennifer Baker
620 Lesher Pl. 
Lansing, MI 48912 
Phone: 800/234-5333; 517/372-9004 
E-mail:
neogen-info@neogen.com
Web:
www.neogen.com/alertsulfite.htm

Sulfite (E0725854) Enzymatic

85 min

R-Biopharm, Inc.
Contact: Sean Tinkey
7950 US 27 South
Marshall, MI 49068
Phone: 877/789-3033
E-mail: sales@r-biopharm.com
Web: www.r-biopharm.com/

References Contents

21 CFR 73.35. 1999. Astaxanthin. Title 21, part 73, subpart A, sec. 35, Code of Federal Regulations, U.S. Government Printing Office, Washington, DC.

21 CFR 73.75. 1999. Canthaxanthin. Title 21, part 73, subpart A, sec. 75, Code of Federal Regulations, U.S. Government Printing Office, Washington, DC.

AOAC. 1995a. Sulfites in foods, optimized Monier-Williams method. Vol. 2, Ch. 47, Official Method 990.28, Section 47.3.43. In Official Methods of Analysis of AOAC, 16th ed.. P. Cunniff (Ed.), p. 29-31. AOAC International, Gaithersburg, MD.

Cooper, P.L., Marshall, M.R., Gregory, J.F., and Otwell, W.S. 1985. Preliminary study on the use of ion chromatography to measure residual sulfite levels in shrimp. In Proceedings of the Tropical and Subtropical Fisheries Technical Conference, p. 141-147. Florida Sea Grant Program, University of Florida, Gainsville, FL.

Cooper, P.L., Marshall, M.R., Gregory, J.F., and Otwell, W.S. 1986. Ion chromatography for determining residual sulfite on shrimp. J. Food Sci. 51(4):924-927.

DeWitt, B.J. and Finne, G. 1985. A comparison of methods for determining sulfur dioxide in shrimp. In Proceedings of the Tropical and Subtropical Fisheries Technical Conference, p. 135-140. Florida Sea Grant Program, University of Florida, Gainsville FL.

FDA. 2001. Food & Color Additives. Ch. 19. In Fish and Fishery Products Hazards and Controls Guidance, 3rd ed., p. 237-248. Food and Drug Administration, Center for Food Safety and Applied Nutrition, Office of Seafood, Washington, DC.

Nordlee, J.A., Naidu, S.G., and Taylor, S.L. 1988. False positive and false negative reactions encountered in the use of sulfite test strips for the detection of sulfite-treated foods. J. Allergy Clin. Immunol. 81:537-541.

Ogawa, S., Toyoda, M., Ito, Y., and Iwaida, M. 1978. Determination of sulphites and borates in imported frozen prawns, frozen shrimps and salted jelly fish. Bull. National Institute of Hygienic Sciences 96:130-132.

Yamagata, M. and Low, L.K. 1992a. Determination of sulphur dioxide by Rankine method (Alkali titration method). In Laboratory Manual on Analytical Methods and Procedures for Fish and Fish Products, Katsutoshi Miwa and Su Ji Lim (Eds.), D-9.1 to D-9.5. Marine Fisheries Research Department, Southeast Asian Fisheries Development Center.

Yamagata, M. and Low, L.K. 1992b. Determination of sulphur dioxide by Rankine method (Colorimetric method). In Laboratory Manual on Analytical Methods and Procedures for Fish and Fish Products, Katutoshi Miwa and Su Ji Lim (Eds.), D-10.1 to D-10.6. Marine Fisheries Research Department, Southeast Asian Fisheries Development Center.

Sea Grant

Updated: 08/30/07

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Pamela D. Tom, SeafoodNIC Director
Background profile

Sea Grant Extension Program
Food Science & Technology Department
University of California
One Shields Avenue, Davis, CA 95616

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