Taylor 16oz. Thiosulfate N/10 - R-0007-E
All reagents have a shelf life, whether they are liquids, powders, crystals, tablets, or test-strip pads. If kept dry, powders and crystals are very stable; acids are also long lived. Date of manufacture is not the controlling factor when it comes to shelf life – storage conditions are more important. As with all perishables, reagents are sensitive to environmental influences and will last longer under controlled conditions. To this end, we recommend:
- Storing reagents at a consistent temperature in the range of 36°–85°F (2°–29°C); extreme temperature fluctuation, say from a refrigerator to a hot car trunk, causes reagents to deteriorate.
- Keeping them out of prolonged direct sunlight. (Note: their brown plastic bottles help protect very light-sensitive reagents.)
- Segregating reagents from containers of treatment chemicals.
- Replacing caps immediately and tightening them carefully so that exposure to air and humidity is limited.
- Avoiding switching bottle caps, placing bottle caps on soiled surfaces, repouring reagents into contaminated containers, or touching test strip pads.
- Taylor formulates its reagents to remain effective for at least one year, with only very few exceptions. As a general precaution, replace all reagents more than one year old, or at the beginning of a new testing season.