GrokFood Home

73.355 Phaffia yeast.

Home > Regulations > Listing of color additives exempt from certification > 73.355 Phaffia yeast.

[Code of Federal Regulations]

[Title 21, Volume 1]

[Revised as of April 1, 2006]

From the U.S. Government Printing Office via GPO Access

[CITE: 21CFR73.355]

[Page 352-353]


                        TITLE 21--FOOD AND DRUGS






of Contents


                             Subpart A_Foods


Sec.  73.355  Phaffia yeast.

    (a) Identity. (1) The color additive phaffia yeast consists of the 

killed, dried cells of a nonpathogenic and nontoxicogenic strain of the 

yeast Phaffia rhodozyma.

    (2) Phaffia yeast may be added to the fish feed only as a component 

of a stabilized color additive mixture. Color additive mixtures for fish 

feed use made with phaffia yeast may contain only those diluents that 

are suitable and are listed in this subpart as safe for use in color 

additive mixtures for coloring foods.

    (b) Specifications. Phaffia yeast shall conform to the following 

specifications and shall be free from impurities other than those named 

to the extent that such impurities may be avoided by good manufacturing 


Physical state, solid.

Lead, not more than 5 parts per million.

Arsenic, not more than 2 parts per million.

Mercury, not more than 1 part per million.

Heavy metals (as Pb), not more than 10 parts per million.

Astaxanthin, not less than 0.4 percent.

    (c) Uses and restrictions. Phaffia yeast may be safely used in the 

feed of

[[Page 353]]

salmonid fish in accordance with the following prescribed conditions:

    (1) The color additive is used to enhance the pink to orange-red 

color of the flesh of salmonid fish.

    (2) The quantity of astaxanthin in finished feed, from phaffia yeast 

when used alone or in combination with other astaxanthin color additive 

sources listed in this part 73, shall not exceed 80 milligrams per 

kilogram (72 grams per ton) of finished feed.

    (d) Labeling requirements. (1) The labeling of the color additive 

and any premixes prepared therefrom shall bear expiration dates for the 

sealed and open container (established through generally accepted 

stability testing methods), other information required by Sec.  70.25 of 

this chapter, and adequate directions to prepare a final product 

complying with the limitations prescribed in paragraph (c) of this 


    (2) The presence of the color additive in finished fish feed 

prepared according to paragraph (c) of this section shall be declared in 

accordance with Sec.  501.4 of this chapter.

    (3) The presence of the color additive in salmonid fish that have 

been fed feeds containing phaffia yeast shall be declared in accordance 

with Sec. Sec.  101.22(b), (c), and (k)(2) and 101.100(a)(2) of this 


    (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.

[65 FR 41587, July 6, 2000]

Additives that reference this regulation:

Source: U.S. Code of Federal Regulations - CFR Title 21, Part 73, Section 355

Home | About | Search