Recent Acute Toxicity Test Results Show Thio-RedTM, TR-50, TR-6, and WST-315 precipitants are significantly less toxic than DTC or Sodium Hydrosulfide (NaSH).
Acute toxicity tests were recently performed on Water Specialists Environmental Technologies Thio-RedTM, TR-50, TR-6, and WST-315 precipitants by an independent ecological laboratory.
These precipitants were tested for LC50 values, which means the concentration of the precipitant that is lethal to 50% of the exposed organisms. For these tests, the organisms used included Pimephales Promelas (fathead minnow)and Ceriodaphnia Dubia (water flea).
In summary, the report shows the following LC50 values after 48-hour static acute toxicity tests:
| FISH | Thio-RedTM | TR-50 | TR-6 | DTC-40* | Nash 20-40* | WST-315 |
| Ceriodaphnia Dubia (Water Flea) | 445 ppm | 183 ppm | 21.2 ppm | 0.2 ppm | 0.3 ppm | 4,244 ppm |
| Primephales Promelas (Fathead Minnow) | 342 ppm | 159 ppm | 25.9 ppm | 3.7 ppm | 0.5 ppm | 3,850 ppm |
*Data obtained online
The bottom line is that DTC and NaSH are considerably more toxic than Thio-RedTM, TR-50, TR-6 & WST-315
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