Registration Dossier
Registration Dossier
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EC number: 285-561-1 | CAS number: 85117-09-5 Mixtures of chemical substances produced by burning (below 1200°C) natural variants of limestone or chalk containing from 10 to 20%, or more, of clayey or siliceous materials which are predominantly SiO2, Al2O3 and iron oxide. Consist primarily of 2CaOsb.2, Ca(OH)2, CaO and 2CaOsb.2O3. 3CaO.2SiO2, 4CaOsb.2O3. Fe2O3, 2CaOsb.2O3sb.2, CaCO3 and SiO2 may also be included.
Storage stability and reactivity towards container material
Administrative data
Link to relevant study record(s)
- Endpoint:
- storage stability and reactivity towards container material
- Type of information:
- experimental study
- Adequacy of study:
- supporting study
- Study period:
- no data
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- other: see 'Remark'
- Remarks:
- This study was performed by a governmental agency (the German "Bundesanstalt für Materialforschung und -prüfung, BAM; Federal Institute for Material Research and Testing) with respect to classification according to transport regulations. However, documentation of the testing procedure is relatively brief. Therefore, in view of the general reliability of governmental institutes, the report was considered to be reliable with restrictions.
- Qualifier:
- no guideline available
- Principles of method if other than guideline:
- According to IMDG-Code S.8003, if the corrosion rate at 55 °C test temperature is lower than 6.25 mm/year, the test material is non-corrosive to metal surfaces.
- GLP compliance:
- no
- Type of method:
- testing for reactivity towards container material
- Remarks:
- Testing of the corrosivity of milk of lime (turbid aqueous solution of calcium dihydroxide) towards steel and aluminium (potential container materials).
- Specific details on test material used for the study:
- PACKAGING
- Type of container / packaging: Aluminium sheets were used as surrogate for a container
- Pack size: Not applicable
- Approximate empty weigth or volume: Not applicable
TEST CONDITIONS
- Study duration: 60 days
- Temperature: 55 °C
- Humidity: No data, sheets were immersed half or completely
- Sampling times: End of study
ANALYTICAL METHODS
- Analytical method used: None
- Handling of test samples prior to sampling: Not applicable
OTHER
- The corrosion rate was determined in mm/year according IMDG-Code S.8003.
- The oxide layer of the aluminium sheet was removed prior to exposure. - Results:
- 40 % milk of lime: Corrosion rate: < 6.25 mm/year (at 55 °C)
10 % milk of lime: Corrosion rate: < 6.25 mm/year (at 55 °C) - Transformation products:
- not specified
- Storage stability / reactivity towards container material:
- corrosive to container material
- Conclusions:
- According to the criteria of IMDG-Code S.8003, milk of lime (40 % or 10 % aqueous solution of calcium dihydroxide) is not corrosive to aluminium (and steel).
- Endpoint:
- storage stability and reactivity towards container material
- Type of information:
- experimental study
- Adequacy of study:
- supporting study
- Study period:
- no data
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- other: see 'Remark'
- Remarks:
- This study was performed by a governmental agency (the German "Bundesanstalt für Materialforschung und -prüfung, BAM; Federal Institute for Material Research and Testing) with respect to classification according to transport regulations. However, documentation of the testing procedure is relatively brief. Therefore, in view of the general reliability of governmental institutes, the report was considered to be reliable with restrictions.
- Qualifier:
- no guideline available
- Principles of method if other than guideline:
- According to IMDG-Code S.8003, if the corrosion rate at 55 °C test temperature is lower than 6.25 mm/year, the test material is non-corrosive to metal surfaces.
- GLP compliance:
- no
- Type of method:
- testing for reactivity towards container material
- Remarks:
- Testing of the corrosivity of milk of lime (turbid aqueous solution of calcium dihydroxide) towards steel and aluminium (potential container materials).
- Specific details on test material used for the study:
- PACKAGING
- Type of container / packaging: Steel sheet was used as surrogate for a container
- Pack size: Not applicable
- Approximate empty weigth or volume: Not applicable
TEST CONDITIONS
- Study duration: 60 days
- Temperature: 55 °C
- Humidity: No data, sheets were immersed half or completely
- Sampling times: End of study
ANALYTICAL METHODS
- Analytical method used: None
- Handling of test samples prior to sampling: Not applicable
OTHER
- The corrosion rate was determined in mm/year according IMDG-Code S.8003.
- The oxide layer of the aluminium sheet was removed prior to exposure. - Results:
- 40 % milk of lime: Corrosion rate: < 6.25 mm/year (at 55 °C)
10 % milk of lime: Corrosion rate: < 6.25 mm/year (at 55 °C) - Transformation products:
- not specified
- Storage stability / reactivity towards container material:
- corrosive to container material
- Conclusions:
- According to the criteria of IMDG-Code S.8003, milk of lime (40 % or 10 % aqueous solution of calcium dihydroxide) is not corrosive to steel (and aluminium).
Referenceopen allclose all
Description of key information
The corrosion rate of aluminium and steel at 55 °C test temperature by aqueous solutions of calcium hydroxide is lower than 6.25 mm/year, thus the test material is non-corrosive to metal surfaces.
Additional information
Non-corrosive to metal surfaces.
Since alkalinity is the driving factor for reactivity of the substance towards container materials and alkalinity of lime (chemical) hydraulic and calcium hydroxide is comparable (the pH of a saturated aqueous solution of lime (chemical) hydraulic has been determined at 12.3 (see water solubility, O'Connor and Woolley, 2010), and Ca(OH)2 creates a pH value of 12.4 (Fox, 2010b), the results of this study can be considered relevant also for lime (chemical) hydraulic.
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.
