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EC number: 225-768-6 | CAS number: 5064-31-3
Short-term toxicity to aquatic invertebrates
Administrative data
Link to relevant study record(s)
Description of key information
Arthur et al (1974) presents 96 hr TL50(or LC50) results of 80 and 115 mg/L Na3NTA for the amphipod, Gammarus pseudolimnaeus. Tests were conducted according to APHA (1971) Standard Methods 13 ed.
Key value for chemical safety assessment
Fresh water invertebrates
Fresh water invertebrates
- Effect concentration:
- 80 mg/L
Additional information
Arthur et al (1974) presents 96 hr TL50(or LC50) results of 80 and 115 mg/L Na3NTA for the amphipod, Gammarus pseudolimnaeus. Tests were conducted according to APHA (1971) Standard Methods 13 ed. Canton and Slooff (1982) presented a 48 hr LC50 range of 560 -1,000 mg/L but this study was considered not reliable. Weaver (1967) tested adult snails in soft and hard dilution waters with resulting 96hr TLm of 400 ppm for soft water and 560 ppm for hard water.
Arthur et al. (1974) was chosen as key study as it was the most senitive reliable data for short-term toxicity of NTA to freshwater invertebrates.
Table 1. Summary of Short-term Toxicity to Freshwater Invertebrates
| Guideline | Species | Effect Concentration | Reference | Reliability |
| APHA (1971) Standard Methods 13th ed. | Gammarus pseudolimnaeus | 96hr LC50 = 80 and 115 mg/L NTA | Arthur et al. (1974) | 2- reliable with restrictions |
| OECD 202 | Daphnia magna | 48 hr LC50 560 -1000 mg/L | Canton and Slooff (1982) | 3 - not reliable |
| none available | Physa heterostropha | 96 hr TLm 400 -560 mg/L | Weaver (1967) | 2 -reliable with restrictions |
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