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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Physical & Chemical properties

Particle size distribution (Granulometry)

Administrative data

Endpoint:
particle size distribution (granulometry)
Type of information:
experimental study
Adequacy of study:
key study
Reliability:
1 (reliable without restriction)

Data source

Reference
Reference Type:
other company data
Title:
Unnamed
Year:
2013
Report date:
2013

Materials and methods

Test guideline
Qualifier:
according to guideline
Guideline:
other: Sieving
Version / remarks:
Internal Compny procedure
GLP compliance:
no
Type of method:
sieving
Type of particle tested:
primary particle
Type of distribution:
other: seiving

Test material

Constituent 1
Chemical structure
Reference substance name:
Calcium hydride
EC Number:
232-189-2
EC Name:
Calcium hydride
Cas Number:
7789-78-8
Molecular formula:
Ca-H2
IUPAC Name:
Calcium dihydride
Test material form:
solid: particulate/powder

Results and discussion

Remarks on result:
other: Obtained internally by seiving
Particle sizeopen allclose all
Percentile:
other: estimate by seiving
Mean:
> 0 - < 2 mm
Remarks on result:
other: Calcium hydride K
Percentile:
other: estimate by seiving
Mean:
> 1 - < 20 mm
Remarks on result:
other: calcium hydride B
Percentile:
other: estimate by seiving
Mean:
> 0.5 - < 2 mm
Remarks on result:
other: calcium hydride S
Percentile:
other: estimate by seiving
Mean:
> 10 - < 100 mm
Remarks on result:
other: calcium hydride O
Percentile:
other: estimate by seiving
Mean:
< 150 µm
Remarks on result:
other: calcium hydride M

Applicant's summary and conclusion

Conclusions:
Calcium hydride particle size is measured using the seiving methodology. Five classes have been determined: K (0-2 mm), B (1-20 mm), M (min 99% < 150 µm), O (10-100 mm), S (0.5-2 mm).