Vinmetrica - Total SO2 Titrant - 1n NaOHFor determination of Total SO2 (not included in SC 100A or SC 300 Analyzer kits). Guaranteed for 6 months. To avoid cross contamination with other reagents, use a dedicated syringe or burette to dispense the NaOH reagent. Store reagents in a dark, cool place with the bottle tightly sealed to maximize shelf life. Good for about 12 tests.