Registration Dossier
Registration Dossier
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EC number: 601-791-0 | CAS number: 12158-37-1
Water solubility
Administrative data
Link to relevant study record(s)
- Endpoint:
- water solubility
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- test procedure in accordance with generally accepted scientific standards and described in sufficient detail
- Justification for type of information:
- In-house data assessment.
Substance is manufactured in water as ca 38% solution. - Qualifier:
- equivalent or similar to guideline
- Guideline:
- OECD Guideline 105 (Water Solubility)
- Principles of method if other than guideline:
- Substance is supplied as water-solution and investigation was performed to confirm solublity.
- GLP compliance:
- no
- Type of method:
- other: Observations
- Key result
- Water solubility:
- > 380 g/L
- Conc. based on:
- test mat.
- Temp.:
- 20 °C
- pH:
- ca. 1.5
- Water solubility:
- ca. < 15 mg/L
- Conc. based on:
- test mat. (total fraction)
- Remarks:
- Chromium
- Temp.:
- 20 °C
- pH:
- > 5.5
- Details on results:
- pH 1.5 Soluble . There was no increase in the weight of the membrane used for the test and therefore all the substance remained soluble at that pH.
pH 5.5 Poorly soluble The concentration of soluble Cr(NO3)2OH from the original substance was < 15 mg/kg - Conclusions:
- The solubility is very pH dependant with precipitation at neutral or alkaline pH resulting in very low water solubility expected under environmental conditions.
The substance supplied is very acidic and remains in solution.
Reference
Description of key information
Under acidic conditions, the substance is miscible in water, but once raised to pH 5.5 or higher, the substance will precipitate (other salts will form). Solublity at pH 5.5 is < 15 mg/l.
Under environmental conditions, solublity of chromium is expected to be very low and close to some background environmental concentrations.
CSR figure assumes miscible in water
Key value for chemical safety assessment
- Water solubility:
- 1 000 g/L
- at the temperature of:
- 20 °C
Additional information
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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