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Ecotoxicological information

Toxicity to aquatic algae and cyanobacteria

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Reference
Endpoint:
toxicity to aquatic algae and cyanobacteria
Type of information:
experimental study
Adequacy of study:
key study
Study period:
2019
Reliability:
1 (reliable without restriction)
Qualifier:
according to
Guideline:
OECD Guideline 201 (Freshwater Alga and Cyanobacteria, Growth Inhibition Test)
GLP compliance:
yes
Specific details on test material used for the study:
Name CARMINE LAKE
Batch no. HPFC16006A
Appearance: fine red powder
Composition: Hydrated aluminium chelate of carminic acid (7-beta-Dglucopyranosyl-3,5,6,8-tetrahydroxy-1-methyl-9,10-dioxoanthracene-2-carboxylic acid)
CAS No. 1390-65-4
EC-No. 217-724-4
Molecular formula: C22H20O13
Molecular weight: 492.39 g/mol
Vapour pressure: unknown
Stability in solvents: H2O: not stated; EtOH: not stated; Acetone: not stated; CH3CN: not stated; DMSO: not stated
Solubility in solvents: Soluble in alkaline water (pH >9.5); H2O: unknown; EtOH: unknown; Acetone: unknown; CH3CN: unknown; DMSO:unknown
Storage Room Temperature (20 ± 5 °C); Keep away from light
Analytical monitoring:
yes
Test organisms (species):
Desmodesmus subspicatus (previous name: Scenedesmus subspicatus)
Test type:
static
Water media type:
brackish water
Total exposure duration:
72 h
Test temperature:
21.0 – 24.0 °C
pH:
7.6-8.1
Nominal and measured concentrations:
4.6 / 10 / 22 / 46 / 100 mg/L (nominal)
Reference substance (positive control):
yes
Remarks:
Potassium dichromate (K2Cr2O7, CAS No. 7778-50-9)
Key result
Duration:
72 h
Dose descriptor:
NOEC
Remarks:
growth rate and yield
Effect conc.:
ca. 2.6 mg/L
Nominal / measured:
nominal
Conc. based on:
test mat.
Basis for effect:
growth rate
Key result
Duration:
72 h
Dose descriptor:
LOEC
Remarks:
Growth rate and yield
Effect conc.:
ca. 3.9 mg/L
Nominal / measured:
nominal
Conc. based on:
test mat.
Basis for effect:
growth rate
Key result
Duration:
72 h
Dose descriptor:
EC50
Effect conc.:
ca. 7.5 mg/L
Nominal / measured:
nominal
Conc. based on:
test mat.
Basis for effect:
other: yield

Description of key information

Key value for chemical safety assessment

EC50 for freshwater algae:
7.5 mg/L
EC10 or NOEC for freshwater algae:
2.6 mg/L

Additional information