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EC number: 203-896-3 | CAS number: 111-69-3
- 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
Hydrolysis
Administrative data
- Endpoint:
- hydrolysis
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 14 DECEMBER 1993 to 28 JULY 1994
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- other: Study carried out according to EU testing guideline and in compliance with GLP. All presented results are reliable.
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 1 994
- Report date:
- 1994
Materials and methods
Test guideline
- Qualifier:
- according to guideline
- Guideline:
- EU Method C.7 (Degradation: Abiotic Degradation: Hydrolysis as a Function of pH)
- GLP compliance:
- yes
- Remarks:
- no certificate of analysis
Test material
- Reference substance name:
- Adiponitrile
- EC Number:
- 203-896-3
- EC Name:
- Adiponitrile
- Cas Number:
- 111-69-3
- Molecular formula:
- C6H8N2
- IUPAC Name:
- hexanedinitrile
Constituent 1
- Radiolabelling:
- no
Study design
- Details on sampling:
- - Sampling intervals for the parent product: initially and after 21, 45, 69, 144, 192 and 234 hours
- Sampling method: no data but analysis on duplicates and purged with nitrogen prior to analysis
- Sampling times for pH measurements: monitoring over the period of the test
- Sampling intervals/times for sterility check: no data
- Sample storage conditions before analysis: no storage of the samples - Buffers:
- - pH: 4.0
- Type and final molarity of buffer: 0.05M Disodium hydrogen orthophosphate dodecahydrate and citric acid monohydrate
- Composition of buffer: Disodium hydrogen orthophosphate dodecahydrate (13.8 g) and citric acid (6.45 g) were dissolved in purified water (950 mL) and the pH was adjusted to 4.0 with 1M HCl or 1M NaOH. The volume was adjusted to 1000 mL with purified water.
- pH: 7.0
- Type and final molarity of buffer: 0.05M Potassium dihydrogen orthophosphate
- Composition of buffer: Potassium dihydrogen orthophosphate (3.4 g) was dissolved in purified water (950 mL), 1 M NaOH (15 mL) was added and the pH was adjusted to 7.0 with 1M HCl or 1M NaOH. The volume was adjusted to 1000 mL with purified water.
- pH: 9.0
- Type and final molarity of buffer: 0.05M Disodium tetraborate decahydrate and potassium dihydrogen orthophosphate
- Composition of buffer: Disodium tetraborate decahydrate (16.55 g) and Potassium dihydrogen orthophosphate (1.80 g) were dissolved in purified water (950 mL) and the pH was adjusted to 9.0 with 1M HCl or 1M NaOH. The volume was adjusted to 1000 mL with purified water. - Details on test conditions:
- Test system:
- Type, material and volume of test flasks, other equipment used: glass bottle (inert in the pH range studied).
- Sterilisation method: data not available.
- Lighting: in the dark.
- Measures to exclude oxygen: samples were purged with nitrogen and sealed.
- Is there any indication of the test material adsorbing to the walls of the test apparatus? no.
Test medium:
- Volume used/treatment: 50 mL.
- Kind and purity of water: purified water.
- Renewal of test solution: no.
Duration of testopen allclose all
- Duration:
- 10 d
- pH:
- 4
- Temp.:
- 50
- Initial conc. measured:
- 435 - 466 mg/L
- Duration:
- 10 d
- pH:
- 7
- Temp.:
- 50
- Initial conc. measured:
- 461 - 469 mg/L
- Duration:
- 10 d
- pH:
- 9
- Temp.:
- 50
- Initial conc. measured:
- 495 - 497 mg/L
- Number of replicates:
- two per measured points
- Positive controls:
- no
- Negative controls:
- no
- Statistical methods:
- none
Results and discussion
- Preliminary study:
- After 10 days of experiment, plotting a regression, the back-calculation at 120 hours (5 days) at pH 4, 7 and 9 and 50°C, showed less than 10% hydrolysis had occurred, demonstrating an equivalent half-life of greater than 1 year at all three pH values.
- Transformation products:
- no
Total recovery of test substance (in %)open allclose all
- % Recovery:
- 104
- pH:
- 4
- Temp.:
- 50 °C
- Duration:
- 120 h
- % Recovery:
- 103
- pH:
- 7
- Temp.:
- 50 °C
- Duration:
- 120 h
- % Recovery:
- 96
- pH:
- 9
- Temp.:
- 50 °C
- Duration:
- 120 h
Dissipation DT50 of parent compoundopen allclose all
- pH:
- 4
- Temp.:
- 50 °C
- DT50:
- > 1 yr
- Type:
- (pseudo-)first order (= half-life)
- Remarks on result:
- other: ln Y = ln(490.8) – 3.213 x 10-4 X
- pH:
- 7
- Temp.:
- 50 °C
- DT50:
- > 1 yr
- Type:
- (pseudo-)first order (= half-life)
- Remarks on result:
- other: ln Y = ln(462.1) + 3.538 x 10-4 X
- pH:
- 9
- Temp.:
- 50 °C
- DT50:
- > 1 yr
- Type:
- (pseudo-)first order (= half-life)
- Remarks on result:
- other: ln Y = ln(465.0) + 2.484 x 10-4 X
- Other kinetic parameters:
- no data
Any other information on results incl. tables
The report mixed the lines for the total recovery results. In the current robust summary, after checking and recalculating the results, the total recovery of the test substance after 5 days are correct.
Applicant's summary and conclusion
- Validity criteria fulfilled:
- yes
- Conclusions:
- After the preliminary experiment, half-life of the test substance appeared to be over 1 year under acid, neutral or basic conditions.
- Executive summary:
The hydrolysis of the test substance was tested in a tier approach following international guidelines. The test substance was analyzed against time in duplicate by gas chromatography employing flame ionization detection under acid, neural and basic conditions. Three buffer solutions (pH = 4, 7, and 9) were used in this experiment.
After 5 days at 50 °C, more than 90% of the test substance was recovered in each buffer solutions drawing a half-life of the test substance over 1 year due to hydrolysis.
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