Registration Dossier
Registration Dossier
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EC number: 215-211-5 | CAS number: 1313-82-2
Particle size distribution (Granulometry)
Administrative data
Link to relevant study record(s)
Description of key information
Sodium sulfide is produced and marketed in the form of plain flakes. The average of the median physical particle size D50 of Na2S (commercial form, type ca. 60 %) is approximately 3,500 µm (study result)
Total Dustiness of the airborn fraction of Na2S (commercial form, type ca. 60 %): 0.31 mg/g (study result).
MMAD (mono modal distribution) of airborne fraction: MMAD = 33.93 µm
GSD of MMAD: GSD = 2.79 µm
Fractional deposition in human respiratory tract (MPPD model, based on calculated MMAD):
Head (ET): 44.23 %; Tracheobronchial (TB): 0.22 %; Pulmonary (PU): 0.49 %
Additional information
For the evaluation of this endpoint, data from a study (Parr, 2010; Grewe, 2010) that was conducted according to national standard (DIN 55992 -1:2006, modified Heubach method) and data from a guideline compliant study (OECD 110, Smeykal, 2010) were used as key information.
The Parr, 2010; Grewe, 2010 - study considers the airborne fraction of sodium sulfide, which is exposure-related and relevant for workplace conditions. In the other study (Smeykal, 2010), the airborne fraction of sodium sulfide was not determined, but the total of the substance used for sieving analysis. This is not exposure-related and not relevant for workplace conditions.
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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