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The acute and chronic toxicity of sodium chloride has been examined in various terrestrial species, including worms, arthropods, macrophytes, and birds. In chronic studies with terrestrial organisms, the NOEC (based on mortality) for NaCl was reported as 3507 mg/kg soil in a 10 -week study with the earthworm, Eisenia fetida. In a chronic terrestrial macrophyte study, the lowest reported NOEC of 243 mg/kg soil dw was based on stem growth in Kentucky blugrass. The mean 14 -day LC50 for sodium chloride and the earthworm, E. fetida, was 3,296 mg/kg dw. The 24-hour LD50 for silkworms was 8900 ppm NaCl when injected into the hemolymph of the larvae. In a 7-day exposure study with red fescue grass, the IC50 for germination was 500.8 mg NaCl/kg soil dw. The 12-hour LD50 for wild house sparrows was approximately 3,000 - 3,500 mg/kg NaCl. Taken together, the lowest terrestrial toxicity value was the NOEC of 243 mg/kg soil dw based on Kentucky bluegrass growth, and this value was used to calculate a PNECsoil.

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