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EC number: 225-768-6 | CAS number: 5064-31-3
Short-term toxicity to fish
Administrative data
Link to relevant study record(s)
Description of key information
Arthur et al (1974) presents 96 hr TL50(or LC50) results of 103 and 125 mg/L NA3NTA for the fathead minnow, Pimephales promelas. Tests were conducted according to APHA (1971) Standard Methods 13 ed.
Key value for chemical safety assessment
Fresh water fish
Fresh water fish
- Effect concentration:
- 103 mg/L
Additional information
Arthur et al (1974) presents 96 hr TL50(or LC50) results of 103 and 125 mg/L NA3NTA for the fathead minnow, Pimephales promelas. Tests were conducted according to APHA (1971) Standard Methods 13 ed.
This study was chosen as key study as it was the most sensitive reliable data for short-term toxicity of NTA to freshwater fish. Macek and Sturm (1973) provided 96 hr TL50 of 98 mg/L for exposure of Na3NTA to rainbow trout. This study was deemed unreliable. Weaver (1967) exposed blugill to Na3NTA in batch and flow-through tests, in soft and hard waters. This study was deemed reliable with restrictions as study was missing some testing information which did not affect the overall conclusion of the test.
Table 1. Summary of Short-term Toxicity to Fish
| Guideline | Species | Effect Concentration | Reference | Reliability |
| APHA (1971) Standard MEthods 13th ed. | Pimephales promelas | 96hr LC50 = 103 and125 mg/L NTA | Arthur et al. (1974) | 2- reliable with restrictions |
| summary of other data:LC50 >= 98 mg/L | Brouwer and Terpstra (1994) | 4 - secondary literature | ||
| none followed | Salmo gairdneri (new name: Oncorhynchus mykiss) | 96 hr TL50 = 98 mg/L | Macek and Sturm (1973) | 3- not reliable |
| Similar to OECD 203 | Lepomis macrochirus | 96 hr TLm: soft water: continuous = 298 mg/L, batch = 270 mg/L Na3NTA hard water: continuous = 510 mg/L, batch = 521 mg/L Na3NTA |
Weaver (1967) | 2 - reliable with restrictions |
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