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EC number: 701-026-1 | CAS number: -
Water solubility
Administrative data
Link to relevant study record(s)
- Endpoint:
- water solubility
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 2012-09-17 to 2012-11-23
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.6 (Water Solubility)
- Deviations:
- no
- GLP compliance:
- yes (incl. QA statement)
- Type of method:
- flask method
- Water solubility:
- >= 4.5 - <= 4.9 mg/L
- Temp.:
- 20 °C
- pH:
- >= 5.9 - <= 6
- Details on results:
- The overall water solubility of the test item at a temperature of 20 °C was determined to be 4.7 mg/L.
- Conclusions:
- Interpretation of results: slightly soluble (0.1-100 mg/L)
- Executive summary:
The study was performed as a multisite study. The solubility experiments were performed by Siemens AG whereas the analytics (total organic carbon (TOC) measurements) were performed by Currenta Analytik. The water solubility of the test item (carbonised PAN based fibre, milled) at a temperature of 20 °C was determined to be 4.7 mg/L.
Reference
Water solubility of the test item – experiments A-D
Experiment |
A |
B |
C |
D (blank) |
Amount of test item (mg) |
53.1 |
51.3 |
50.9 |
-- |
Amount of distilled water (mL) |
50 |
50 |
50 |
50 |
Stirring time at 30 °C (h) |
24 |
48 |
72 |
72 |
pH at 23 °C |
6.0 |
6.0 |
5.9 |
5.9 |
Measured carbon concentration (total organic carbon in mg/L) |
4.64 |
4.22 |
4.35 |
--1) |
Water solubility (mg/L) |
4.9 |
4.5 |
4.6 |
-- |
1)below the quantification limit
The water solubility of the test item was determined to be 4.7 mg/L.
Description of key information
The solubility in water was determined by the flask method according to OECD guideline 105 (water solubility)/EU method A.6 (water solubility).
Key value for chemical safety assessment
- Water solubility:
- 4.7 mg/L
- at the temperature of:
- 20 °C
Additional information
The test substance (milled carbonised PAN based fibre) falls within the typical range of the substance definition including the impurities (in total < 0.3 %) which in principle consist of metal and mixed metal oxides (mainly Al, Ca, Fe, Na, and Si oxides). These substances are of negligible concern regarding human health and the environment. The different manufacturing processes and precursor materials lead to slightly different compositions. Accordingly, the choice of the test material is based on the substance with the highest content of nitrogen. The obtained test result and the resulting classification are therefore regarded to also cover all other qualities of the substance non-graphitic carbon fibre within the scope of this registration.
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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