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EC number: 271-756-9 | CAS number: 68607-24-9
- Life Cycle description
- Uses advised against
- Endpoint summary
- Appearance / physical state / colour
- Melting point / freezing point
- Boiling point
- Density
- Particle size distribution (Granulometry)
- Vapour pressure
- Partition coefficient
- Water solubility
- Solubility in organic solvents / fat solubility
- Surface tension
- Flash point
- Auto flammability
- Flammability
- Explosiveness
- Oxidising properties
- Oxidation reduction potential
- Stability in organic solvents and identity of relevant degradation products
- Storage stability and reactivity towards container material
- Stability: thermal, sunlight, metals
- pH
- Dissociation constant
- Viscosity
- Additional physico-chemical information
- Additional physico-chemical properties of nanomaterials
- Nanomaterial agglomeration / aggregation
- Nanomaterial crystalline phase
- Nanomaterial crystallite and grain size
- Nanomaterial aspect ratio / shape
- Nanomaterial specific surface area
- Nanomaterial Zeta potential
- Nanomaterial surface chemistry
- Nanomaterial dustiness
- Nanomaterial porosity
- Nanomaterial pour density
- Nanomaterial photocatalytic activity
- Nanomaterial radical formation potential
- Nanomaterial catalytic activity
- Endpoint summary
- Stability
- Biodegradation
- Bioaccumulation
- Transport and distribution
- Environmental data
- Additional information on environmental fate and behaviour
- Ecotoxicological Summary
- Aquatic toxicity
- Endpoint summary
- Short-term toxicity to fish
- Long-term toxicity to fish
- Short-term toxicity to aquatic invertebrates
- Long-term toxicity to aquatic invertebrates
- Toxicity to aquatic algae and cyanobacteria
- Toxicity to aquatic plants other than algae
- Toxicity to microorganisms
- Endocrine disrupter testing in aquatic vertebrates – in vivo
- Toxicity to other aquatic organisms
- Sediment toxicity
- Terrestrial toxicity
- Biological effects monitoring
- Biotransformation and kinetics
- Additional ecotoxological information
- Toxicological Summary
- Toxicokinetics, metabolism and distribution
- Acute Toxicity
- Irritation / corrosion
- Sensitisation
- Repeated dose toxicity
- Genetic toxicity
- Carcinogenicity
- Toxicity to reproduction
- Specific investigations
- Exposure related observations in humans
- Toxic effects on livestock and pets
- Additional toxicological data

Endpoint summary
Administrative data
Description of key information
Cationic surfactants like C20/22 ATQ are difficult to test in the aquatic compartment as they are sorbing strongly to solids. Normally the analytical recovery of the cationic is good at the beginning of the test but at the end of the test recovery is often below the acceptable minimum recovery. Lowering of the recovery could be related to sorption of the substance to the test container walls but sorption occurs also to the negatively charged surface of the test organism e.g. of algae or fish. Substance sorbed to the organism means the substance is still present in the test system and if it is demonstrated that sorption to the test container walls is neglectable the nominal concentrations at test begin can be used to derive the L(E)Cx values. If this is not the case the geometric mean of the concentration at the test begin and end can be used.
Aquatic studies not addressing this difficult behaviour of cationics in aqueous test systems may result in effect values being unrealistically low.
For all three trophic levels (fish, daphnia and algae) acute and chronic data are available. C20/22 ATQ is most toxic to daphnia. For daphnia one acute and one chronic study is available. The chronic 21d Daphnia reproduction study is the basis for the PNECaquatic, together with the chronic fish study and the ErC10 Algae which results in an Application factor of 10.
In Table 6.1-1 the different test results which are most relevant are given. All aquatic studies were carried out with active ingredient (a.i).
Table 6.1-1 Test results from C20/22 ATQ - most relevant Acute and Chronic aquatic tests (active ingredient (a.i.))
Test type |
Test medium |
Species |
Effect |
|
|
Guideline |
Acute fish |
River water |
Danio rerio |
LC50 (96h) |
3.5 |
mg/l |
OECD 203 |
Acute Daphnia |
River water |
Daphnia magna |
EC50 (48h) |
1.4 |
mg/l |
OECD 202 |
Algae |
River water |
Desmodesmus subspicatus |
ErC50 (72h) |
3.4 |
mg/l |
OECD 201 |
Sludge respiration inh |
Tap water |
Non-adapted sludge |
EC50 (3h) |
43 |
mg/l |
OECD 209 |
|
|
|
|
|
|
|
Chronic fish |
River water |
Danio rerio |
NOEC (9d) |
240 |
µg/L |
OECD 212 |
Chronic daphnia |
River water |
Daphnia magna |
NOECrepro (21d) |
119 |
µg/L |
OECD 211 |
Chronic Algae |
River water |
Desmodesmus subspicatus |
ErC10 (72h) |
780 |
µg/L |
OECD 201 |
Additional information
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