Potassium metabisulfite is used as an antioxidant and chemical sterilant in wine. Available in 2 gram or 5 gram effervescent packets.
Usage:
| Size | 1 gallon | 30 gallon | 60 gallon |
| 2 gram packet | 528 ppm | 18 ppm | 9 ppm |
| 5 gram packet | 1321 ppm | 44 ppm | 22 ppm |
Calculate: 1 gal. ppm divided by wine volume
Example: 528 divide by 20 gallon = 26 ppm
