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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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.
Reaction mass of tetrasodium 5-{[4-chloro-6-(4-{[2-(sulfonatooxy)ethyl]sulfonyl}anilino)-1,3,5-triazin-2-yl]amino}-4-hydroxy-3-[(4-{[2-(sulfonatooxy)ethyl]sulfonyl}phenyl) diazenyl]naphthalene-2,7-disulfonate and trisodium 5-({4-chloro-6-[4-(vinylsulfonyl) anilino]-1,3,5-triazin-2-yl}amino)-4-hydroxy-3-[(4-{[2-(sulfonatooxy)ethyl]sulfonyl}phenyl)diazenyl]naphthalene-2,7-disulfonate
EC number: 701-360-8 | CAS number: -
- 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
Dissociation constant
Administrative data
Link to relevant study record(s)
- Endpoint:
- dissociation constant
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 03 May 2000 to 05 May 2000
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- guideline study with acceptable restrictions
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 112 (Dissociation Constants in Water)
- Deviations:
- no
- GLP compliance:
- no
- Dissociating properties:
- yes
- No.:
- #1
- pKa:
- >= 1.9 - <= 2.89
- Temp.:
- 22 °C
- Remarks on result:
- other: for the acid range
- No.:
- #2
- pKa:
- >= 8.93 - <= 10.16
- Temp.:
- 22 °C
- Remarks on result:
- other: alkaline range
- Conclusions:
- The dissociation constant of the test substance at room temperature (circa 22°C) was determined within this study as pKa between 1.90 and 2.89 for the acid range, using the five mean values of three experiments.
The pKa value for the alkaline range was determined within this study as pKa between 8.93 and 10.16 based on five mean values obtained from of three experiments. - Executive summary:
The determination of the pKain the acid and alkaline range was carried out according to the OECD guideline no. 112.
The dissociation constant of the test substance at room temperature (circa 22°C) was determined within this study as pKabetween 1.90 and 2.89 for the acid range, using the five mean values of three experiments.
The pKavalue for the alkaline range was determined within this study aspKabetween 8.93 and 10.16 based on five mean values obtained from of three experiments.
The quoted guideline demands pure or commercial grade substances for carrying out the described test methods. The test substance has a purity of about 71 %. Possible effects of impurity on the results has therefore not been assessed.
Reference
The wavelengths 294 nm and 531 nm were chosen for the acid as well as for the alkaline range quantification. During pH measurement the temperature was determined as follows: Exp. 1: 21.5 to 22.2°C; Exp. 2: 22.3 to 22.8°C; Exp. 3: 22.3 to 23.4°C. The pH data were not corrected with acidity functions.
Tables 3 to 5 show the results of the determination of the dissociation constant in the acid range
Table 3:Results of experiments 1 and calculation of pKa(SD = standard deviation)
Exp. |
pH |
Absorbance 294 nm |
pKa294 nm |
Absorbance 531 nm |
pKa531 nm |
1-7 |
6.82 |
0.8273 |
dm |
0.4948 |
dm |
1-6 |
5.37 |
0.8256 |
3.94 |
0.4905 |
4.51 |
1-5 |
4.68 |
0.8261 |
3.10 |
0.4901 |
3.86 |
1-4 |
3.40 |
0.8239 |
2.29 |
0.4881 |
2.76 |
1-3 |
2.29 |
0.8201 |
1.55 |
0.486 |
1.80 |
1-2 |
1.55 |
0.8066 |
1.44 |
0.4771 |
1.54 |
1-1 |
0.96 |
0.7801 |
di |
0.4591 |
di |
1 |
|
Mean (SD): |
2.46 (±1.06) |
Mean (SD): |
2.89 (±1.28) |
Table 4:Results of experiments 2 and calculation of pKa(SD = standard deviation)
Exp. |
pH |
Absorbance 294 nm |
pKa294 nm |
Absorbance 531 nm |
pKa531 nm |
2-7 |
6.27 |
0.842 |
dm |
0.4982 |
dm |
2-6 |
5.44 |
0.8440 |
-a) |
0.4992 |
-a) |
2-5 |
4.75 |
0.8433 |
-a) |
0.4980 |
2.58 |
2-4 |
3.87 |
0.8407 |
2.55 |
0.4970 |
2.49 |
2-3 |
2.19 |
0.8330 |
1.60 |
0.4935 |
1.46 |
2-2 |
1.66 |
0.8221 |
1.54 |
0.4862 |
1.49 |
2-1 |
1.10 |
0.7946 |
di |
0.4685 |
di |
2 |
|
Mean (SD): |
1.90 (± 0.57) |
Mean (SD): |
2.01 (± 0.61) |
a)The absorbance values do not allow the calculation of the pKavalue
Table 5:Results of experiments 3 and calculation of pKa(SD = standard deviation)
Exp. |
pH |
Absorbance 294 nm |
pKa294 nm |
Absorbance 531 nm |
pKa531 nm |
3-7 |
6.72 |
0.7866 |
dm |
0.4705 |
dm |
3-6 |
5.77 |
0.7880 |
-a) |
0.4698 |
4.08 |
3-5 |
4.31 |
0.7823 |
3.33 |
0.4652 |
3.56 |
3-4 |
3.24 |
0.7851 |
1.77 |
0.4675 |
2.21 |
3-3 |
2.62 |
0.7809 |
1.78 |
0.4631 |
2.05 |
3-2 |
1.54 |
0.7659 |
1.47 |
0.4532 |
1.53 |
3-1 |
0.78 |
0.7413 |
di |
0.4355 |
di |
3 |
|
Mean (SD): |
2.09 (± 0.84) |
Mean (SD): |
2.69 (± 1.08) |
a)The absorbance value does not allow the calculation of the pKavalue
Tables 6 to 8 show the results of the determination of the dissociation constant in the alkaline range
Table 6:Results of experiments 1 and calculation of pKa(SD = standard deviation)
Exp. |
pH |
Absorbance 294 nm |
pKa294 nm |
Absorbance 531 nm |
pKa531 nm |
1-7 |
6.82 |
0.8273 |
dm |
0.4948 |
dm |
1-8 |
7.07 |
0.8280 |
-a) |
0.4950 |
-a) |
1-9 |
9.75 |
0.8273 |
-a) |
0.4835 |
8.58 |
1-10 |
10.20 |
0.8224 |
8.96 |
0.4698 |
9.41 |
1-11 |
10.63 |
0.8109 |
9.97 |
0.4334 |
10.35 |
1-12 |
11.32 |
0.7876 |
11.21 |
0.3585 |
11.83 |
1-13 |
12.38 |
0.7363 |
di |
0.3168 |
di |
1 |
|
Mean (SD): |
10.05 (± 1.13) |
Mean (SD): |
10.04 (±1.39) |
a)The absorbance values do not allow the calculation of the pKavalue
Table 7:Results of experiments 2 and calculation of pKa(SD = standard deviation)
Exp. |
pH |
Absorbance 294 nm |
pKa294 nm |
Absorbance 531 nm |
pKa531 nm |
2-7 |
6.27 |
0.8429 |
dm |
0.4982 |
dm |
2-8 |
6.55 |
0.8441 |
-a) |
0.4978 |
3.90 |
2-9 |
9.57 |
0.8440 |
-a) |
0.4871 |
8.39 |
2-10 |
10.36 |
0.8377 |
9.05 |
0.4615 |
9.77 |
2-11 |
10.63 |
0.8200 |
10.04 |
0.4350 |
10.36 |
2-12 |
11.47 |
0.7921 |
11.39 |
0.3448 |
12.23 |
2-13 |
12.47 |
0.7306 |
di |
0.3180 |
di |
2 |
|
Mean (SD): |
10.16 (± 1.17) |
Mean (SD): |
8.93 (± 3.13) |
a)The absorbance values do not allow the calculation of pKavalue
Table 8:Results of experiments 3 and calculation of pKa(SD = standard deviation)
Exp. |
pH |
Absorbance 294 nm |
pKa294 nm |
Absorbance 531 nm |
pKa531 nm |
3-7 |
6.72 |
0.7866 |
dm |
0.4705 |
dm |
3-8 |
6.91 |
0.7839 |
5.33 |
0.4680 |
5.08 |
3-9 |
8.62 |
0.7874 |
-a) |
0.4661 |
7.05 |
3-10 |
9.69 |
0.7876 |
-a) |
0.4588 |
8.56 |
3-11 |
11.01 |
0.7594 |
10.55 |
0.3721 |
11.15 |
3-12 |
12.02 |
0.7177 |
12.29 |
0.3037 |
13.78 |
3-13 |
12.54 |
0.6806 |
di |
0.3008 |
di |
3 |
|
Mean (SD): |
9.39 (± 3.62) |
Mean (SD): |
9.12 (± 3.42) |
a)The absorbance values do not allow the calculation of the pKavalue
Description of key information
The dissociation constant of the test substance at room temperature (circa 22°C) was determined within this study as pKa between 1.90 and 2.89 for the acid range, using the five mean values of three experiments.
Key value for chemical safety assessment
Additional information
The determination of the pKain the acid and alkaline range was carried out according to the OECD guideline no. 112.
The dissociation constant of the test substance at room temperature (circa 22°C) was determined within this study as pKabetween 1.90 and 2.89 for the acid range, using the five mean values of three experiments.
The pKavalue for the alkaline range was determined within this study aspKabetween 8.93 and 10.16 based on five mean values obtained from of three experiments.
The quoted guideline demands pure or commercial grade substances for carrying out the described test methods. The test substance has a purity of about 71 %. Possible effects of impurity on the results has therefore not been assessed.
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.