Ammonium bromide

Toxicity to aquatic plants other than algae

Link to relevant study record(s)

Reference

Reference 1

Endpoint:

toxicity to aquatic plants other than algae

Type of information:

experimental study

Adequacy of study:

supporting study

Study period:

1991

Reliability:

4 (not assignable)

GLP compliance:

not specified

Specific details on test material used for the study:

Details on properties of test surrogate or analogue material (migrated information):
Ammonium bromide is an inorganic salt that dissociates to its composite ions in aqueous solutions at environmental pH and temperature. Comparison of the available data on the various bromide salts have shown that the bromide ion is the relevant ion for determination of the toxicological profile with simple cations such as potassium, sodium or ammonium, that are ubiquitous in nature, having little or no influence on the bromide ion properties. It is therefore justified to read-across data from other inorganic bromide salts to ammonium bromide.

Analytical monitoring:

not specified

Test organisms (species):

other: other aquatic plant: Lemna minor

Dose descriptor:

EC50

Effect conc.:

11 000 mg/L

Basis for effect:

other: not stated

Reference 2

Endpoint:

toxicity to aquatic plants other than algae

Type of information:

experimental study

Adequacy of study:

key study

Study period:

1983

Reliability:

2 (reliable with restrictions)

Qualifier:

no guideline available

Principles of method if other than guideline:

other

GLP compliance:

no

Specific details on test material used for the study:

Details on properties of test surrogate or analogue material (migrated information):
Ammonium bromide is an inorganic salt that dissociates to its composite ions in aqueous solutions at environmental pH and temperature. Comparison of the available data on the various bromide salts have shown that the bromide ion is the relevant ion for determination of the toxicological profile with simple cations such as potassium, sodium or ammonium, that are ubiquitous in nature, having little or no influence on the bromide ion properties. It is therefore justified to read-across data from other inorganic bromide salts to ammonium bromide.

Analytical monitoring:

no

Details on sampling:

Not stated

Vehicle:

no

Details on test solutions:

Criteria Details
Source Dutch Standard Water – origin not stated
Salinity Not stated
Hardness Not stated
pH Not stated
Ca / Mg ratio 2.1:1
Na / K ratio 6:1
Oxygen content Not stated
Conductance Not stated
TOC Not stated
Holding water different from dilution water Not stated

Test organisms (species):

other: other aquatic plant: Lemna minor

Details on test organisms:

Criteria Details
Strain / Clone Lemna minor
Source Standardised laboratory culture

Kind of food Composition of medium (in distilled water)
Compound Concentration mg/L
NaHCO3 207
CaCl2.2H2O 276
MgSO4.7H2O 198
KH2PO4 15
NH4Cl 16
NaCl 111
KNO3 30
FeCl3.6H2O 4.67
Na2EDTA 4
H3BO3 2.86
Co(NO3)2 0.08
CuSO4.5H2O 0.08
MnCl2.4H2O 2.845
ZnSO4.7H2O 0.4
VO(SO4).5H2O 0.02

Test type:

static

Water media type:

freshwater

Limit test:

no

Post exposure observation period:

not stated

Hardness:

not stated

Test temperature:

24-26 degree C

pH:

not stated

Dissolved oxygen:

not stated

Salinity:

not stated

Nominal and measured concentrations:

Nominal concentrations used differed by a factor of √10. Test concentrations included 3200 mg/L. Full range tested was not stated.

Details on test conditions:

Test temperature 25 ± 1 °C
Dissolved oxygen Not stated
pH Not stated
Adjustment of pH Not stated
Aeration of dilution water Not stated
Quality/Intensity of irradiation 35 W/m2
Photoperiod Not stated
Test type Static
Renewal of test solution None
Volume of test vessels 200 mL
Volume/organism 100 mL per front
Number of organisms/vessel 2 fronts per vessel
Number of vessels/ concentration 2
Test performed in closed vessels due to significant volatility of TS No

Reference substance (positive control):

no

Dose descriptor:

NOEC

Effect conc.:

3 200 mg/L

Nominal / measured:

nominal

Basis for effect:

growth rate

Remarks on result:

other: duration of test not stated

Dose descriptor:

LOEC

Effect conc.:

10 000 mg/L

Nominal / measured:

nominal

Basis for effect:

growth rate

Remarks on result:

other: duration of test not stated

Details on results:

no further details

Results with reference substance (positive control):

no

Reported statistics and error estimates:

Not stated

Test result is equivalent to: NOEC = 2480 mg(Br-)/L for the bromide ion

Validity criteria fulfilled:

no

Conclusions:

The aquatic plant Lemna minor was exposed to sodium bromide (concentration range not specified) in test waters in a static toxicity test. Observations of specific growth rates were used to determine the LOEC and NOEC values.
Growth effect data were not given. The NOEC was found to be 3200 mg/L NaBr based on specific growth rates.

Description of key information

The aquatic plant Lemna minor was exposed to sodium bromide in test waters in a static toxicity test. Observations of specific growth rates were used to determine the LOEC and NOEC values. The NOEC was found to be 3200 mg/L sodium bromide based on specific growth rates.

Key value for chemical safety assessment

EC10 or NOEC for freshwater plants:

3 200 mg/L

Additional information

Ammonium bromide is an inorganic salt that dissociates to its composite ions in aqueous solutions at environmental pH and temperature. Comparison of the available data on the various bromide salts have shown that the bromide ion is the relevant ion for determination of the toxicological profile with simple cations such as potassium, sodium or ammonium, that are ubiquitous in nature, having little or no influence on the bromide ion properties. It is therefore justified to read-across data from other inorganic bromide salts to ammonium bromide.

The aquatic plant Lemna minor was exposed to sodium bromide in test waters in a static toxicity test. Observations of specific growth rates were used to determine the LOEC and NOEC values. The NOEC was found to be 3200 mg/L sodium bromide based on specific growth rates.