Pyridinium, 1-(phenylmethyl)-, ethyl methyl derivs., chlorides

Long-term toxicity to fish

Administrative data

Endpoint:

long-term toxicity to fish

Data waiving:

study scientifically not necessary / other information available

Justification for data waiving:

other:

Justification for type of information:

Although effects were observed in an acute 96 hour fish study, the effect concentration is about 100 times higher than with algae, showing alge to be very much more succeptable to the substance. Further testing on fish cannot be justified as this is not the most sensitive marine or aquatic organism.

Cross-reference

Reason / purpose for cross-reference:

data waiving: supporting information

Reference

Endpoint:

toxicity to aquatic algae and cyanobacteria

Type of information:

experimental study

Adequacy of study:

key study

Study period:

72 hours, performed 2020

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

OECD Guideline 201 (Alga, Growth Inhibition Test)

Version / remarks:

Including analytical verification

GLP compliance:

yes (incl. QA statement)

Specific details on test material used for the study:

Purity: 90.8 % Non-volatiles at 130 °C
Physical State/Appearance: Viscous brown liquid

Analytical monitoring:

yes

Details on sampling:

Analysis of the test preparations at 0 hours showed measured test concentrations to range from 0.0012 to 0.37 mg/L. Analysis of the test preparations at 72 hours showed measured test concentrations to range from 0.00074 to 0.29 mg/L.
Given this decline in measured test concentrations it was considered justifiable to base the results on the geometric mean measured test concentrations in order to give a "worst case".

Vehicle:

no

Details on test solutions:

0Nominal concentrations of 0.0010, 0.0032, 0.010, 0.032, 0.10 and 0.32 mg/L
(three replicate flasks per concentration)

Test organisms (species):

other: Raphidocelis subcapitata

Test type:

static

Water media type:

freshwater

Limit test:

no

Total exposure duration:

72 h

Hardness:

Not specified, but stated to be to OECD standard test media

Test temperature:

Temperature was maintained at 24 ±1 ºC throughout the test

pH:

The pH value of the control cultures was observed to increase from pH 7.7 at 0 hours to pH 9.0 at 72 hours.

Nominal and measured concentrations:

Nominal concentrations of 0.0010, 0.0032, 0.010, 0.032, 0.10 and 0.32 mg/L
Mean measured test concentrations 0.00093, 0.0030, 0.010, 0.033, 0.11 and 0.33 mg/L.

Reference substance (positive control):

no

Duration:

72 h

Dose descriptor:

EC50

Effect conc.:

ca. 0.15 mg/L

Nominal / measured:

nominal

Conc. based on:

test mat.

Basis for effect:

growth rate

Duration:

72 h

Dose descriptor:

EC50

Effect conc.:

ca. 0.071 mg/L

Nominal / measured:

nominal

Conc. based on:

test mat.

Basis for effect:

biomass

Validity criteria fulfilled:

yes

Conclusions:

The substance is considered toxic to the aquatic environment.