Alkali salt of substituted aryl sulfonyl triazinyl amino hydroxy sulfonyl aryl diazo naphthalene sulfonate

Short-term toxicity to aquatic invertebrates

Administrative data

Endpoint:

short-term toxicity to aquatic invertebrates

Type of information:

experimental study

Adequacy of study:

key study

Study period:

08 August 2011 to 10 August 2011

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

other: Study conducted to EU, US and OECD test guidance in compliance with GLP.

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

2011

Report date:

2011

Materials and methods

Test guideline

Test guideline 1

Qualifier:

according to guideline

Guideline:

EU Method C.2 (Acute Toxicity for Daphnia)

Deviations:

no

Test guideline 2

Qualifier:

according to guideline

Guideline:

OECD Guideline 202 (Daphnia sp. Acute Immobilisation Test)

Deviations:

no

Test guideline 3

Qualifier:

according to guideline

Guideline:

EPA OPPTS 850.1010 (Aquatic Invertebrate Acute Toxicity Test, Freshwater Daphnids)

Deviations:

no

GLP compliance:

yes

Test material

Test material information

Constituent 1

Details on test material:

Name: Reactive Red F08-0146

Specific details on test material used for the study:

Details on properties of test surrogate or analogue material (migrated information):
Not applicable

Sampling and analysis

Analytical monitoring:

yes

Details on sampling:

One test concentration - 100 mg/L. Concentration of Reactive Red F08-0146 in the test solutions was determined at the beginning and at the end of each water renewal period.

Test solutions

Vehicle:

yes

Details on test solutions:

Dilution and Preparation of Testing Solutions

Prior to treatment of each renewal periods, a test solution of 100 mg/L (nominal) was prepared by diluting an appropriate amount of test item in ISO medium. An amount of 50 mg test substance was diluted in 500 mL ISO medium and then distributed into test vessels.

Untreated Control

The dilution water (ISO-medium) was used without of addition of the test item.

Reference Control

For the evaluation of the quality of the Daphnia clone and the experimental conditions, Potassium dichromate is tested at least twice a year to demonstrate satisfactory test conditions. The date of the last study (Study Code: 11/168-023DA) with reference item Potassium dichromate (batch no.: 0769128) is: 12-14 July 2011.
The 24h EC50: 0.79 mg/L, (95 % confidence limits: 0.74 – 0.84 mg/L)

Dilution Water

Reconstituted water (ISO medium, according to OECD 202) was used as dilution water for both the range finding and definitive tests. The same composition of reconstituted water was used for the tests and for breeding the test animals.

Test organisms

Test organisms (species):

Daphnia magna

Details on test organisms:

Species and strain: Daphnia magna
Source: National Institute of Public Health, 1097 Budapest Gyáli u. 2-6. Hungary
Breeding: The Daphnia are bred in Ecotoxicological Laboratory of CiToxLAB Hungary Ltd. The health of the stock animals is continuously monitored by visual daily checking. Abnormal behavior or significant decrease of population is recorded.
Justification of strain: Daphnia magna is the standard species of the acute immobilisation test.
Number of animals: There were 20 animals in test group and control group respectively, divided into 4 replicates (5 animals / replicate)
Age of the animals: They were less than 24 h old at the beginning of the test
Acclimatization: There was no acclimatization because the water used was similar to the culture water

Study design

Test type:

static

Water media type:

freshwater

Limit test:

yes

Total exposure duration:

48 h

Post exposure observation period:

No post exposure observation period

Test conditions

Hardness:

The reconstituted water (ISO medium) had an approximate theoretical total hardness of 249 mg/L (as CaCO3).

Test temperature:

The water temperature was measured at the start and at the end of each renewal period in each test vessel. The test temperature was in the range of 21.0 – 21.3°C measured in the test vessels. The additionally measured temperature in the climate chamber was between 20.7 and 21.2°C.

pH:

The pH of the test solution was not adjusted and not varied by more than 1.5 units in any one test. The pH was measured at the start and at the end of each renewal period in each test vessel and was in the range of 7.66 – 7.84.

Dissolved oxygen:

The dissolved oxygen concentration was measured in each test vessel at the start and at the end of each renewal period and was in the range of 7.1 – 7.5 mg/L.

Salinity:

Not applicable.

Nominal and measured concentrations:

Nominal = 100 mg/L
Measured concentrations were 106.6 and 110.6 mg/L at the start and 61.5 and 79.4 mg/L at the end of renewal periods respectively. Concentrations of test item deviated more 20 per cent from the initial values at the end of the renewal periods, however geometric mean value of measured concentrations (87.1 mg/L) was within ±20 per cent of the nominal concentration.

Details on test conditions:

TEST CONDITIONS

Temperature: The water temperature was measured at the start and at the end of each renewal period in each test vessel. The test temperature was in the range of 21.0 – 21.3°C measured in the test vessels. The additionally measured temperature in the climate chamber was between 20.7 and 21.2°C.
Oxygen concentration: The dissolved oxygen concentration was measured in each test vessel at the start and at the end of each renewal period and was in the range of 7.1 – 7.5 mg/L.
pH: The pH of the test solution was not adjusted and not varied by more than 1.5 units in any one test. The pH was measured at the start and at the end of each renewal period in each test vessel and was in the range of 7.66 – 7.84.
Light: The test was carried out in 16-hour light and 8-hour dark cycle.
Hardness: The reconstituted water (ISO medium) had an approximate theoretical total hardness of 249 mg/L (as CaCO3).

Reference substance (positive control):

yes

Remarks:

Potassium dichromate

Results and discussion

Effect concentrations

Effect concentrations 1

Duration:

48 h

Dose descriptor:

EC50

Effect conc.:

> 100 mg/L

Nominal / measured:

nominal

Conc. based on:

test mat.

Basis for effect:

mobility

Effect concentrations 2

Duration:

48 h

Dose descriptor:

NOEC

Effect conc.:

100 mg/L

Nominal / measured:

nominal

Conc. based on:

test mat.

Basis for effect:

mobility

Effect concentrations 3

Duration:

48 h

Dose descriptor:

LOEC

Effect conc.:

> 100 mg/L

Nominal / measured:

nominal

Conc. based on:

test mat.

Basis for effect:

mobility

Effect concentrations 4

Duration:

48 h

Dose descriptor:

EC100

Effect conc.:

> 100 mg/L

Nominal / measured:

nominal

Conc. based on:

test mat.

Basis for effect:

mobility

Details on results:

Under the conditions of this Daphnia magna acute immobilisation study the observed endpoints for the effect of Reactive Red F08-0146 were the followings:

Parameter Test item concentration [mg/L]
(48h) nominal measured
EC50 > 100 > 87.1
NOEC 100 87.1
LOEC > 100 > 87.1
EC100 > 100 > 87.1

Based on the results of this study, the test item Reactive Red F08-0146 had no toxic effect on daphnids up to at least 100 mg/L nominal.

Results with reference substance (positive control):

Potassium dichromate is tested at least twice a year to demonstrate satisfactory test conditions.
The date of the last study (Study Code: 11/168-023DA) with reference item Potassium dichromate (batch no.: 0769128) is: 12-14 July 2011.
The 24h EC50: 0.79 mg/L, (95 % confidence limits: 0.74 – 0.84 mg/L)

Reported statistics and error estimates:

No statistical analysis was performed because of the lack of toxic effects.
The EC50, NOEC, LOEC and EC100 values were determined directly from the raw data.

Any other information on results incl. tables

Validity

 

There were no immobilized animal in the control group and the dissolved oxygen concentration at the end of the test in control and test vessels was more than 3 mg/L. All validity criteria were within acceptable limits and therefore the study can be considered as valid.

 

Concentrations of the test item

 

Concentration of Reactive Red F08-0146 was analytically determined at the start and at the end of each renewal period.

Measured concentrations were 106.6 and 110.6 mg/L at the start and 61.5 and 79.4 mg/L at the end of renewal periods. Concentrations of test item deviated more 20 per cent from the initial values at the end of the renewal periods, however geometric mean value of measured concentrations (87.1 mg/L) was within ±20 per cent of the nominal concentration. Biological results are reported separately based on nominal as well as measured value.

Immobilisation

The number of immobilised animals and the percentage of immobility were determined at the 24^thand 48^thhour. There was no immobilisation in 20 daphnids exposed to each group. In addition to immobility, no abnormal behaviour or appearance of test animals was detected.

 

Number and percentage of immobilised animals

Test Group	Number of treated animals	Number of immobilised animals
		24 hours		48 hours
		number	percent	number	percent
Control	20	0	0	0	0
100 mg/L (nominal)	20	0	0	0	0

Applicant's summary and conclusion

Validity criteria fulfilled:

yes

Conclusions:

Acute toxicity of Reactive Red F08-0146 was assessed with Acute Immobilisation Test on Daphnia magna, over an exposure period of 48 hours.

All validity criteria were met during this study.

Under the conditions of this Daphnia magna acute immobilisation study the observed endpoints for the effect of Reactive Red F08-0146 were the following:
Parameter Test item concentration [mg/L]
(48 hr) nominal measured
EC50 > 100 > 87.1
NOEC 100 87.1
LOEC > 100 > 87.1
EC100 > 100 > 87.1

Based on the results of this study, the test item Reactive Red F08-0146 had no toxic effect on daphnids up to at least 100 mg/L nominal.

Executive summary:

Acute toxicity of Reactive Red F08-0146 on Daphnia magna was assessed in an Acute Immobilisation Test, over an exposure period of 48 hours in a semi-static test system.The frequency of the water renewal periods were 24 hours.

Toxic effects were not observed during the preliminary concentration range-finding test therefore a limit test was performed in the main experiment using only one test concentration (100 mg/L nominal) and one control group.

The test design included four replicates at each test group (test item and control). Each group comprised twenty Daphnia, five in each of the four replicate vessels, each containing approximately 40 mL test dilution.

There was no immobilisation in 20 daphnids exposed to each group. In addition, no abnormal behaviour or appearance of test animals was detected.

The test item concentration was analytically determined at the start and at the end of each renewal period. Measured concentrations at the end of the renewal periods deviated more 20 per cent from the initial values, however geometric mean value of measured concentrations was within ±20 per cent of the nominal concentration, therefore biological results are reported separately based on nominal and measured value.

All validity criteria were met during this study.

 

Under the conditions of this Daphnia magna acute immobilisation study the observed endpoints for the effect of Reactive Red F08-0146 were the following:

 

Parameter (48h)	Test item concentration [mg/L]
	nominal	measured
EC50	> 100	> 87.1
NOEC	100	87.1
LOEC	> 100	> 87.1
EC100	> 100	> 87.1

 

Based on the results of this study, the test item Reactive Red F08-0146 had no toxic effect on daphnids at up to 100 mg/L nominal.