Registration Dossier

Diss Factsheets

Physical & Chemical properties

Endpoint summary

Administrative data

Description of key information

- Relative density: 2.84

- PSD: D10 = 7.1 μm D50 = 21.8 μm D90 = 56.2 μm

- Dustiness: 71.49 mg/g MMAD1 = 13.56 µm (35.6 %), GSD1 = 2.85; MMAD2 = 38.09 µm (64.4 %), GSD 2 = 1.58

Fractional deposition in human respiratory tract: Head (ET): 43.92 %, Tracheobronchial (TB): 0.38 %, Pulmonary (PU): 0.67 %

- Water solubility: 225.2 ± 5.1 g/L at 20 °C and pH 9.4 -9.6 (exclusion of CO2 and O2, under inert argon gas)

- Transformation / dissolution: 263 ± 12 μg/L at pH 8 and 267 ± 8 μg/L at pH 6

- Oxidizing properties: Not considered relevant for sodium metavanadate based on chemical structure and oxygen content.

Additional information

Data for the physico-chemical properties of sodium metavanadate was provided based on studies for the following endpoints:

(i) density

(ii) granulometry and dustiness testing

(iii) water solubility and transformation/dissolution testing

(iv) oxidising properties

 

The other endpoints (i.e. appearance, melting point and flammability) are based on handbook data and/or long time experiences in handling.

 

It is noted here that handbook data for physico-chemical properties are considered to be from a trusted source acc. to "ECHA, Guidance on information requirements and chemical safety assessment – Chapter R.7a: Endpoint specific guidance" and therefore, these data were considered reliable.

 

The results of the studies are reported in the endpoint summary as well as in the accompanying IUCLID database. Data for several endpoints were waived due to intrinsic properties of sodium metavanadate and/or based on the criteria as laid down in regulation (EC) 1907/2008.

 

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