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EC number: 257-269-4 | CAS number: 51548-48-2
- 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
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- Flash point
- Auto flammability
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- pH
- Dissociation constant
- Viscosity
- Additional physico-chemical information
- Additional physico-chemical properties of nanomaterials
- Nanomaterial agglomeration / aggregation
- Nanomaterial crystalline phase
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- Endpoint summary
- Stability
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- Environmental data
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- 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
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- Toxicological Summary
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- Additional toxicological data

Adsorption / desorption
Administrative data
Link to relevant study record(s)
- Endpoint:
- adsorption / desorption
- Remarks:
- adsorption
- Type of information:
- calculation (if not (Q)SAR)
- Remarks:
- Migrated phrase: estimated by calculation
- Adequacy of study:
- weight of evidence
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- other: Data is from computational model developed by USEPA
- Qualifier:
- according to guideline
- Guideline:
- other: Modeling database
- Principles of method if other than guideline:
- KOCWIN Program (v2.00)
- GLP compliance:
- no
- Type of method:
- other: estimation
- Media:
- soil
- Radiolabelling:
- not specified
- Test temperature:
- 25 deg.C
- Analytical monitoring:
- not specified
- Type:
- Koc
- Value:
- 173.6
- Temp.:
- 25 °C
- Remarks on result:
- other: Log Koc=2.2395 (Estimated via MCI method)
- Validity criteria fulfilled:
- not specified
- Conclusions:
- The Soil Adsorption Coefficient i.e Koc value of (5or8)-aminonaphthalene-2-sulphonic acid was estimated as Koc -173.6 L/kg(log Koc=2.239) by means of MCI method at 25 deg.C. This Koc value indicates that the substance (5or8)-aminonaphthalene-2-sulphonic acid has low sorption to soil and sediment and therefore have moderate migration potential to groundwater.
- Executive summary:
The Soil Adsorption Coefficient i.e Koc value of (5or8)-aminonaphthalene-2-sulphonic acid was estimated as Koc -173.6 L/kg(log Koc=2.239) by means of MCI method at 25 deg.C. This Koc value indicates that the substance (5or8)-aminonaphthalene-2-sulphonic acid has low sorption to soil and sediment and therefore have moderate migration potential to groundwater.
Reference
KOCWIN Program (v2.00) Results:
==============================
SMILES : c1cc2cc(ccc2c(c1)N)S(=O)(=O)O
CHEM :
MOL FOR: C10 H9 N1 O3 S1
Koc may be sensitive to pH!
--------------------------- KOCWIN v2.00 Results ---------------------------
Koc Estimate from MCI:
---------------------
First Order Molecular Connectivity Index ........... : 6.982
Non-Corrected Log Koc (0.5213 MCI + 0.60) .......... : 4.2396
Fragment Correction(s):
1 Sulfonic acid (-S(=O)-OH) ............. : -2.0000
Corrected Log Koc .................................. : 2.2396
Estimated Koc: 173.6 L/kg
Description of key information
The Soil Adsorption Coefficient i.e Koc value of (5or8)-aminonaphthalene-2-sulphonic acid was estimated as Koc -173.6 L/kg(log Koc=2.239) by means of MCI method at 25 deg.C. This Koc value indicates that the substance (5or8)-aminonaphthalene-2-sulphonic acid has low sorption to soil and sediment and therefore have moderate migration potential to groundwater.
Key value for chemical safety assessment
- Koc at 20 °C:
- 173.6
Additional information
Predicted data of adsorption endpoint for the target chemical (5or8)-aminonaphthalene-2-sulphonic acid (Cas no. 51548-48-2) were reviewed to summarize as follows:
From EPI SUITE (KOCWIN Program (v2.00)) predicted model the Soil Adsorption Coefficient i.e Koc value of (5or8)-aminonaphthalene-2-sulphonic acid was estimated as Koc -173.6 L/kg(log Koc=2.239) by means of MCI method at 25 deg.C. This Koc value indicates that the substance (5or8)-aminonaphthalene-2-sulphonic acid has low sorption to soil and sediment and therefore have moderate migration potential to groundwater.
Another predicted model Chemspider - ACD/PhysChem Suite indicate the soil adsorption coefficient i.e Koc value of test substance (5or8)-aminonaphthalene-2-sulphonic acid was estimated to be 1 L/Kg at pH 5.5 and at pH 7.4.
This estimated Koc Value concluded that the test substance (5or8)-aminonaphthalene-2-sulphonic acid have the tendency to low to negligible sorption to soil and sediment.
[LogKoc: 2.239]
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