Registration Dossier
Registration Dossier
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EC number: 232-218-9 | CAS number: 7790-69-4
Endpoint summary
Administrative data
Description of key information
Additional information
Appearance/physical state/colour
Lithium nitrate is a white, crystalline, odourless solid.
Melting point
The melting point of lithium nitrate is in the range of 253 - 264 °C according to available handbook and published data.
Boiling point
The boiling temperature of the test item was determined by differential scanning calorimetry according to OECD Test Guideline 103 and EU test method A.2. No boiling point could be determined prior to decomposition (starting at approx. 450 °C). (AQura, 2012)
This is supported by handbook data and published data stating that lithium nitrate decomposes at 600 °C.
Density
The relative density of lithium nitrate is ca. 2.38 according to available handbook and published data.
Particle size distribution
The particle size distribution of the test item lithium nitrate anhydrous was measured by volumetric distribution. The values were as follows: d10: 292.01 µm, d50: 508.82 µm, d90: 582.55 µm. (FMC, 2010)
For lithium nitrate the percentage of particles <10 µm is 0.1 %.
Vapour pressure
According to column 2 of REACH Regulation (EC) No 1907/2006, Annex VII, section 7.5, it is stated, that if the melting point is between 200 °C and 300 °C, a limit value based on a recognised calculation method is sufficient. Lithium nitrate´s melting point is in the range of 253 °C to 264 °C. A vapour pressure of 1.4E-15 Pa at 25 °C was estimated with the modified Grain method (EPISuite, v4.10).
Partition coefficient
According to column 2 of REACH Regulation (EC) No 1907/2006, Annex VII, section 7.8, a test to determine the partition coefficient n-octanol/water does not need to be conducted as lithium nitrate is an inorganic compound.
Water solubility
According to available handbook and published data, lithium nitrate has a solubility of 1020 g/L at 20 °C, i.e. it is very soluble in water.
Surface tension
In accordance with column 2 of REACH Regulation (EC) No 1907/2006, Annex VII, section 7.6, the determination of surface tension only needs to be conducted if surface activity is to be expected or can be predicted. Based on the molecular structure, surface tension is not expected for lithium nitrate.
Flashpoint
In accordance with column 2 of REACH Regulation (EC) No 1907/2006, Annex VII, section 7.9, the determination of the flash point does not need to be conducted, because lithium nitrate is an inorganic solid.
Auto flammability
In accordance with column 2 of REACH Regulation (EC) No 1907/2006, Annex VII, section 7.12, a self ignition temperature study does not need to be conducted as lithium nitrate is not flammable (see IUCLID section 4.13). Further, experience in handling and use gives no indication that the substance is self-heating up to 400 °C.
Flammability
A flammability test for solids was performed with lithium nitrate according to UN Recommendations on the Transport of Dangerous Goods, Manual of Tests and Criteria, N1: Test Method for readily combustible solids, sub-section 33.2.1.4. The study supports the expert statement regarding the flammability of lithium nitrate. Lithium nitrate was non-flammable in the test. (FMC, 2012)
The chemical structure of lithium nitrate does not contain chemical groups, which may lead to the conclusion that the test substance is capable of developing a dangerous amount of (flammable) gas in contact with water. Further, lithium nitrate does not contain any chemical group that might lead to spontaneous ignition shortly after coming in contact with air at room temperature (Ref.: R.7a: Guidance on information requirements and chemical safety assessment, EU-Document (2012). The experience in handling and use does not indicate flammability upon contact with water or pyrophoric properties.
Further, lithium nitrate does not meet the criteria for organic peroxides.
Explosiveness
Lithium nitrate does contain chemical groups (nitrogen chemically bound with oxygen) that are associated with explosive properties. But it is not considered to be explosive because of experiences in handling and use of the substance by the registrant. Further, lithium nitrate is listed in "Transported Dangerous Goods of the UN" where it is not classified regarding explosive properties.
Oxidising properties
According to available handbook and published data lithium nitrate is an oxidising agent.
Stability in organic solvents and identity of relevant degradation products
In accordance with column 2 of REACH Regulation (EC) No 1907/2006, Annex IX, section 7.15, the determination of the stability in organic solvents was waived, because lithium nitrate is an inorganic salt.
Storage stability and reactivity towards container material
Corrosion to metals:
In accordance with ECHA guidance on the Application of the CLP Criteria section 2.15, the test has obviously been designed for liquids. Thus, as the substance is a solid at room temperature the study was not conducted. Furthermore, experience handling lithium nitrate in the laboratory and the plant indicate that it is not corrosive to metals. It does not meet the criteria in the UN Manual of Tests and Criteria, 5th Edition, section 37.4 for materials corrosive to metal.
Dissociation constant
The dissociation constant Ksp of lithium nitrate was calculated using the solubility product. This resulted in a log Ksp of 2.34. (SCC, 2012)
Viscosity
Lithium nitrate is a solid and therefore the determination of viscosity was waived (refer to guidance on information requirements and chemical safety assessment, EU-Document, chapter R. 7a, 2012).
Additional physico-chemical information
Flammable Aerosols:
Section 2.4.2 of Guidance on the application on the CLP Criteria states as follows: “Aerosols, this means aerosol dispensers, are any non-refillable receptacles made of metal, glass or plastics and containing a gas compressed, liquefied or dissolved under pressure, with or without a liquid, paste or powder, and fitted with a release device allowing the contents to be ejected as solid or liquid particles in suspension in a gas, as a foam, paste or powder or in a liquid state or in a gaseous state.” Thus, as the substance does not meet the definition for aerosol, the test for aerosols was waived.
Gases under pressure:
In accordance with section 1.0 Annex I of Regulation (EC) No 1272/2008, the test does not need to be conducted as the boiling point of the substance is above 20 °C i.e. substance is not completely gaseous at 20 °C at standard pressure. Thus, as the substance is not a gas at room temperature, the test was not conducted.
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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