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Diss Factsheets
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EC number: 201-983-0 | CAS number: 90-30-2
- 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
- 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
![](https://echa.europa.eu./o/diss-blank-theme/images/factsheets/A-REACH/factsheet/print_environmental-fate-and-pathways.png)
Hydrolysis
Administrative data
Link to relevant study record(s)
- Endpoint:
- hydrolysis
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- other: Acceptable, well documented publication which meets basic scientific principles
- Qualifier:
- no guideline followed
- Principles of method if other than guideline:
- incubation of an aqueous solution of PNA in the dark and periodical analyzation by HPLC
- GLP compliance:
- not specified
- Radiolabelling:
- yes
- Analytical monitoring:
- yes
- Details on sampling:
- - Sampling intervals for the parent/transformation products: after 0, 142, 309, 477, 669 and 813 hours
- Sampling method: not specified - Buffers:
- - Type and final molarity of buffer: 0.1M acetate buffer
- Details on test conditions:
- TEST SYSTEM
- Type, material and volume of test flasks, other equipment used: glass tubes (head space 24 mL)
- Lighting: in darkness
- Measures taken to avoid photolytic effects: in darkness
- Is there any indication of the test material adsorbing to the walls of the test apparatus? Yes, accordingly aa similar experiment was set up with radiolabelled PNA
TEST MEDIUM
- Volume used/treatment: 5 mL
- Kind and purity of water: not stated
- Preparation of test medium: aqueous solution - Duration:
- 34 d
- Initial conc. measured:
- 582 µg/L
- Number of replicates:
- 2
- Positive controls:
- no
- Negative controls:
- no
- Transformation products:
- no
- % Recovery:
- >= 45 - <= 52
- Duration:
- 34 d
- Remarks on result:
- other: PNA is removed from the solution but this removal levels off with time. Behaviour of this type is inconsistent with hydrolytic processes, particularly since no degradation products could be detected.
- Details on results:
- no further data
- Validity criteria fulfilled:
- not applicable
Reference
Content of PNA in solutions (tube 1- tube 2, in ppb):
0 h 582 - 582
142 h 416 - 390
309 h 365 - 338
477 h 328 - 292
669 h 299 - 272
813 h 302 - 260
PNA is removed from the solution but this removal levels off with time. Behaviour of this type is inconsistent with hydrolytic processes, particularly since no degradation products could be detected. Probably adsorption to the glass surface could account for the observed decrease in concentration. Accordingly, a similar experiment was set up with 14C-PNA where any disappearance of radioactivity from the solution could only be accounted for by adsorption. Experiment with radiolabelled PNA, Content of PNA in solutions (tube 1- tube 2, in ppb, measured by liquid scintillation counting and consequently a measure of total radioactivity in solution):
0 h 871 - 730
24 h 760 - 730
48 h 780 - 720
120 h 750 - 690
360 h 690 - 620
576 h 680 - 570
Thus, it is concluded that hydrolysis is either unimportant or of very limited importance as environmental pathway.
Description of key information
Hydrolysis is not a relevant degradation pathway of the substance in the environment
Key value for chemical safety assessment
Additional information
In the key study, an aqueous solution of N-phenyl-1-naphtylamine was analyzed periodically by HPLC (Sikka et al. 1981). Total recovery of the test substance was 45-52% after 34 days, no degradation products could be detected. Thus, hydrolysis is not considered to be a relevant degradation pathway for N-phenyl-1-naphthylamine in the environmental.
Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice.
Reproduction or further distribution of this information may be subject to copyright protection. Use of the information without obtaining the permission from the owner(s) of the respective information might violate the rights of the owner.
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