§ 173.55 Polyvinylpyrrolidone.
The food additive polyvinylpyrroli-done may be safely used in accordance with the following prescribed conditions:
（a） The additive is a polymer of purified vinylpyrrolidone catalytically produced, having an average molecular weight of 40,000 and a maximum unsaturation of 1 percent, calculated as the monomer, except that the polyvinylpyrrolidone used in beer is that having an average molecular weight of 360,000 and a maximum unsaturation of 1 percent, calculated as the monomer.
（b） The additive is used or intended for use in foods as follows:
| Food | Limitations |
| Beer | As a clarifying agent, at a residual level not to exceed 10 parts per million. |
| Flavor concentrates in tablet form | As a tableting adjuvent in an amount not to exceed good manufacturing practice. |
| Nonnutritive sweeteners in concentrated liquid form | As a stabilizer, bodying agent, and dispersant, in an amount not to exceed good manufacturing practice. |
| Nonnutritive sweeteners in tablet form | As a tableting adjuvant in an amount not to exceed good manufacturing practice. |
| Vitamin and mineral concentrates in liquid form | As a stabilizer, bodying agent, and dispersant, in an amount not to exceed good manufacturing practice. |
| Vitamin and mineral concentrates in tablet form | As a tableting adjuvant in an amount not to exceed good manufacturing practice. |
| Vinegar | As a clarifying agent, at a residual level not to exceed 40 parts per million. |
| Wine | As a clarifying agent, at a residual level not to exceed 60 parts per million. |
更多关于美国 FDA 可直接加入食品中的辅助性食品添加剂的种类法规，请点击美国FDA 21 CFR 第173部分可直接加入食品中的辅助性食品添加剂种类汇总
