Rev. Rul. 56-415

The use of Polyvinylpyrrolidone (known as PVP) for clarifying and stabilizing wine, within the general limitations of section 240.524 of the Wine Regulations, is considered consistent with good commercial practice. Accordingly, such product may be approved for use by proprietors of bonded wine cellars, pursuant to the provisions or section 240.530 of the regulations, provided the wine after treatment contains less than one-hundredth of one percent (0.01) of the material.

Revenue Ruling 55-603, C.B. 1955-2, 709, which contains a list of materials in addition to those authorized by section 240.529 of the Wine Regulations for use in the treatment of wine, is hereby modified to include Polyvinylpyrrolidone subject to the limitation set forth above. See also modifications contained in Revenue Ruling 56-9, C.B. 1956-1, 750; Revenue Ruling 56-64, C.B. 1956-1, 751; Revenue Ruling 56-202, C.B. 1956-1, 751; and Revenue Ruling 56-341, page 1042 of this Bulletin.