Registration Dossier
Registration Dossier
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EC number: 231-838-7 | CAS number: 7758-29-4
Additional information on environmental fate and behaviour
Administrative data
- Endpoint:
- additional information on environmental fate and behaviour
- Type of information:
- experimental study
- Adequacy of study:
- supporting study
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- other: The study is not conducted to GLP standards. However, the investigations within the study are well documented and scientifically acceptable.
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 1 985
Materials and methods
Test guideline
- Qualifier:
- no guideline available
- Principles of method if other than guideline:
- Washing programs in a washing machine were performed with two different types of washing powders: one containing only tripolyphosphates, the other containing as well zeolites. The washings were performed under three different conditions: without load, with a load that was not dirty and with a dirty load.
- GLP compliance:
- no
Test material
- Reference substance name:
- Pentasodium triphosphate
- EC Number:
- 231-838-7
- EC Name:
- Pentasodium triphosphate
- Cas Number:
- 7758-29-4
- Molecular formula:
- H5O10P3.5Na
- IUPAC Name:
- pentasodium bis(phosphonatooxy)phosphinate
- Details on test material:
- Phosphate species: orthophosphate, pyrophosphate and tripolyphosphate.
Constituent 1
Results and discussion
Any other information on results incl. tables
The studies mainly show that, coming out from the washing machine, 80% of phosphorous is recovered under a soluble form. 60% of the soluble phosphate form is tripolyphosphate (TPP). Thus, 20% of the TPP introduced in the washing machine is transformed or it precipitates during the washing operation. In the more diluted waters coming from the rinsing operation the percentage of soluble phosphorous is notably lower.
The calculation of the speed constant (at room temperature, pH=7 and using concentrations of the phosphate species ranging from 30 to 100 micro mole/l) gave the following values:
- for STPP: K = 2.4 10-2/day- for pyrophosphate: K = 3 10-3/day
This speed constant is 15 times weaker in a solution coming out of a washing machine, in which the concentration of TPP and the pH are higher. This value has to be carefully analysed as the concentration of the phosphate species is dependant on the precipitation of the species that happened during the analysis.
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.
