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EC number: 231-274-1 | CAS number: 7474-78-4
- 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
Melting point / freezing point
Administrative data
- Endpoint:
- melting point/freezing point
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Reliability:
- 1 (reliable without restriction)
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 2 012
Materials and methods
Test guidelineopen allclose all
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.1 (Melting / Freezing Temperature)
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 102 (Melting point / Melting Range)
- GLP compliance:
- yes (incl. QA statement)
- Type of method:
- thermal analysis
Test material
- Reference substance name:
- 3,4-diaminobenzenesulphonic acid
- EC Number:
- 231-274-1
- EC Name:
- 3,4-diaminobenzenesulphonic acid
- Cas Number:
- 7474-78-4
- Molecular formula:
- C6H8N2O3S
- IUPAC Name:
- 3,4-diaminobenzene-1-sulfonic acid
- Details on test material:
- Chemical Name (IUPAC): 3,4-diaminobenzenesulfonic acid
Molecular Formula: C6H8N2O3S
CAS-No.: 7474-78-4
Molecular Weight: 188.205 g/mol
Batch No.: N-18326
Purity: 99.8 [%, w/w]
Date of expiry: 15.09.2013
Certificate of analysis: No AZ-009-2011, 11.10.2011
Constituent 1
Results and discussion
Melting / freezing point
- Melting / freezing pt.:
- ca. 286.6 °C
- Atm. press.:
- ca. 1 013 hPa
- Decomposition:
- yes
- Sublimation:
- no
Any other information on results incl. tables
RESULTS AND DISCUSSION
The following table summarize the results of the three DSC tests:
Endothermic effect Test 1 Test 2 Test 3 Ø2 +3 SD
Onset [°C] 297.11 286.15 287.13 286.64 0.69
Peak Maximum [°C] 314.38 301.94 302.62 302.28
Endset [°C] 325.29 316.02 317.02 316.52
SD = standard deviation
In all tests, an unsteady endothermic melting peak was observed and the colour of the test item changed to black after each run. Test 1 was performed with a higher heating rate of 10K/min and therefore the endothermic peak was shifted to a higher temperature. Thus, for the tests 2 and 3 the heating rate were changed to 5K/min. Although the test item was cooled down and heated again, the endothermic peak did not appear a second time (test 2 & 3). The loss of the endothermic peak after the first heating cycle, the black colour of the sample after each run and the unsteady peak shape is indicating a decomposition of the test item during the melting process. The onset temperatures of test 2 and 3 were not in the expected precision range of the DSC apparatus ( 0.5°C), which could be explained from the unsteady peak shape. Due to the optimized heating rate, only the results from test 2 and 3 were used to calculate the average melting temperature of the test item. Finally, the onset temperature of the endothermic melting peak will be reported with one and the calculated standard deviation with two decimals.
Melting temperature (onset) of the test item 3,4 -diaminobenzenesulfonic acid:
mp = 286.6 +/- 0.69°C (mp = 559.8 +- 0.69 K)
Applicant's summary and conclusion
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.
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