Registration Dossier
Registration Dossier
Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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.
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EC number: 217-157-8 | CAS number: 1758-73-2
Stability: thermal, sunlight, metals
Administrative data
- Endpoint:
- stability: thermal, sunlight, metals, other
- Remarks:
- Migrated from section 'Stability: thermal, sunlight, metals'
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- other: Acceptable, study report which meets basic scientific principles
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 1 991
- Report date:
- 1991
Materials and methods
Test guideline
- Qualifier:
- no guideline available
- Principles of method if other than guideline:
- The thermal stability of FAS aqueous solution was determined at 20 °C, 40 °C and 60 °C, at different pH conditions and as well as under air or nitrogen atmosphere.
- GLP compliance:
- no
Test material
- Reference substance name:
- Aminoiminomethanesulphinic acid
- EC Number:
- 217-157-8
- EC Name:
- Aminoiminomethanesulphinic acid
- Cas Number:
- 1758-73-2
- Molecular formula:
- CH4N2O2S
- IUPAC Name:
- aminoiminomethanesulphinic acid
- Details on test material:
- - Name of test material (as cited in study report): FAS
- Analytical purity: not available
Constituent 1
Results and discussion
For thermal stability study
- Test substance thermally stable:
- no
Operating temperature
- Operating temp.:
- 20 - 40 °C
- Sublimation:
- not determined
- Transformation products:
- not measured
Any other information on results incl. tables
The aqueous FAS-suspension shows worse stability than the dry product. The decomposition starts after 6-12 h at room temperature, and after several minutes at 40 °C. The supsension decomposes faster when it was stirred slowly (4 - 8 h). During the decomposition process, the pH value and redox potential decrease (pH: start 2.9 to end 2.5 - 2.2; redox-potential: start + 40 mV- + 80 mV to end - 400 mV), accompanied with H2S odor. At 60 °C the formation yellow sulfur flock can be observed after 2 days.
Also when the measurement is carried out in nitrogen atmosphere or at a pH of 4-5, no improvement of stability can be obtained.
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.
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.
