Registration Dossier

Diss Factsheets

Administrative data

Endpoint:
nanomaterial dustiness
Type of information:
experimental study
Adequacy of study:
key study
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
test procedure in accordance with generally accepted scientific standards and described in sufficient detail

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2020
Report date:
2020

Materials and methods

Test guideline
Qualifier:
according to guideline
Guideline:
other: EN 17199-4:2019
GLP compliance:
no
Type of method:
rotating cylinder

Test material

Constituent 1
Reference substance name:
Amorphous hydrothermal synthesis product of water, calcium oxide and quartz
Molecular formula:
Not applicable for UVCB substance
IUPAC Name:
Amorphous hydrothermal synthesis product of water, calcium oxide and quartz
Test material form:
solid: nanoform

Data gathering

Instruments:
The standardised Small Rotating Drum (EN 17199-4:2019) dustiness scale gives separate bands ranging from “very low” to “high” mass-based dustiness.(Schneider and Jensen 2008, Liguori, Hansen et al. 2016)

Results and discussion

Dustiness index
Key result
Mean:
117 mg/kg
St. dev.:
26 mg/kg
Remarks on result:
other:
Remarks:
Measured respirable mass dustiness index

Applicant's summary and conclusion

Conclusions:
The band of “moderate dustiness” ranges from 50 to 500 mg/kg. The CSH nanoform that is traded as powder (dried suspension) has dustiness value in this range with a value of 117 mg/kg.