Registration Dossier
Registration Dossier
Data platform availability banner - registered substances factsheets
Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.
The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.
Diss Factsheets
Use of this information is subject to copyright laws and may require the permission of the owner of the information, as described in the ECHA Legal Notice.
EC number: 205-182-7 | CAS number: 135-19-3
- 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
Biodegradation in water: screening tests
Administrative data
Link to relevant study record(s)
- Endpoint:
- biodegradation in water: ready biodegradability
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 24.01.2018 - 21.03.2018
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 301 A (Ready Biodegradability: DOC Die Away Test)
- Deviations:
- no
- GLP compliance:
- no
- Remarks:
- accredited by DAkkS
- Oxygen conditions:
- aerobic
- Inoculum or test system:
- activated sludge, industrial, non-adapted
- Duration of test (contact time):
- 28 d
- Key result
- Parameter:
- % degradation (DOC removal)
- Value:
- 81
- Sampling time:
- 28 d
- Validity criteria fulfilled:
- yes
- Remarks:
- The reference samples biodegraded within 5 days to a degree of 85%. Abiotic control samples showed only low DOC-degradation of 41 mg/l and 32 mg/l.
- Interpretation of results:
- readily biodegradable
- Conclusions:
- 2-Naphthol is rapidly biodegradable as deteminend by a OECD 301A: DOC Die-Away-Test.
- Executive summary:
As a criterion for the classification as rapidly biodegradable a DOC-elimination of 70% of the test item within a 10 day-window during a total test duration of 28 days is considered. The test samples of bata-naphthol does meet this criterion since a DOC-elimination of 70% in the 10 day-window is exceeded. Hence, 2 -naphthol is classified as rapidly biodegradable.
Reference
Table 1: DOC-content of blank value-samples and samples with 2 -naphthol, calculated mean values and resulting difference as well as DOC-degradation within total test duration.
test duration [d] |
DOC [mg/l] of ß-Naphthol-samples |
DOC [mg/l] of blank value samples |
DOC-difference [mg/l] |
DOC degradation[%] |
||||
I |
II |
mean |
I |
II |
mean |
|||
0 |
60,59 |
58,90 |
59,75 |
9,40 |
8,99 |
9,20 |
50,55 |
0 |
2 |
42,66 |
44,12 |
43,39 |
1,80 |
2,82 |
2,31 |
41,08 |
19 |
5 |
46,73 |
46,60 |
46,67 |
4,49 |
3,97 |
4,23 |
42,44 |
16 |
7 |
50,30 |
47,96 |
49,13 |
4,92 |
6,13 |
5,53 |
43,61 |
14 |
9 |
47,60 |
43,59 |
45,60 |
5,74 |
5,44 |
5,59 |
40,01 |
21 |
12 |
37,33 |
29,19 |
33,26 |
7,25 |
9,27 |
8,26 |
25,00 |
51 |
14 |
16,14 |
14,55 |
15,35 |
5,72 |
4,42 |
5,07 |
10,28 |
80 |
16 |
7,56 |
9,27 |
8,42 |
< 0,5 |
< 0,5 |
< 0,5 |
7,92 |
84 |
19 |
13,13 |
10,99 |
12,06 |
< 0,5 |
4,96 |
2,48 |
9,33 |
82 |
23 |
12,28 |
10,74 |
11,51 |
0,50 |
5,57 |
3,04 |
8,48 |
83 |
28 |
12,54 |
10,27 |
11,41 |
2,34 |
1,54 |
1,94 |
9,47 |
81 |
Description of key information
The ready biodegradability of the test substance 2-naphthol was evaluated in accordance with the OECD Testing Guideline 301 A (Ready Biodegradability: DOC Die Away Test).
Sodium acetate trihydrate was used as a reference substance.
The test was performed in duplicate with a known concentration of test substance in inoculated medium incubated at a constant temperature in the dark over 28 days. Sampling was performed at day 0, 2, 5, 7, 9, 12, 14, 16, 19, 23 and 28 days.
The determination of the DOC value was performed using a DOC measurement device (company: DIMATOC) by triple measurement.
The % degradation (DOC removal) after 28 days was 81%. The criterion for classification as rapidly biodegradable is a DOC-elimination of 70% of the test item within a 10 day-window during a total test duration of 28 days. Hence, the test substance 2-Naphthol meets the criteria to be classified as readily biodegradable.
The validity criteria was met as the reference samples biodegraded within 5 days to a degree of 85%. Abiotic control samples showed only low DOC-degradation of 41 mg/L and3 2 mg/L.
Key value for chemical safety assessment
- Biodegradation in water:
- readily biodegradable
- Type of water:
- other: A solution on mineral salts without a carbon source
Additional information
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.