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Diss Factsheets

Administrative data

Endpoint:
nanomaterial aspect ratio/shape
Type of information:
experimental study
Adequacy of study:
key study
Study period:
2015
Reliability:
1 (reliable without restriction)
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:
2019
Report date:
2019

Materials and methods

Test guideline
Qualifier:
no guideline required
Principles of method if other than guideline:
Hydrated particle size measurements were performed by Malvern Instruments on Batch number 06-2154-2 (Type 1). The instrument used was a Malvern Zetasizer Nano ZS capable of measuring particles in the nanometer range by Dynamic Light Scattering (DLS).
GLP compliance:
no
Type of method:
other: DSL

Test material

Constituent 1
Chemical structure
Reference substance name:
Silicate(2-), hexafluoro-, disodium, reaction products with lithium magnesium sodium silicate
EC Number:
285-349-9
EC Name:
Silicate(2-), hexafluoro-, disodium, reaction products with lithium magnesium sodium silicate
Cas Number:
85085-18-3
Molecular formula:
Na(1+/-0.5)[(Si8Mg(5.2+/-0.7)Li(1+/-0.7) O20 (OH,F)4+/-1.5](1+/-0.5)-
IUPAC Name:
Silicate(2-), hexafluoro-, disodium, reaction products with lithium magnesium sodium silicate
Test material form:
solid: particulate/powder
Details on test material:
Batch Number: 09-2151-1 (Type 1)
Date Manufactured: Type 1 – 2nd June 2009
Specific details on test material used for the study:
Identification: Laponite Type 1 – Silicate(2-), hexafluoro-, disodium, reaction products with lithium magnesium sodium silicate,
CAS#85085-18-3, EC#285-349-9
Description: White powder
Batch Number Type 1 – 06-2154-2 + 09-2151-1
Date Manufactured: Type 1 – 06-2154-2 (26th July 2006) + 09-2151-1 (2nd June 2009)
Expiry Date: 4 years from manufacture
Storage conditions: Room temperature in the dark
Quoted stability: Stable at normal conditions

Results and discussion

Shape description
Shape:
other: disc
Percentage:
100 %
Aspect ratio
x Dimension:
ca. 37.4
St. dev.:
0.2
y Dimension:
ca. 37.4
St. dev.:
0.2
z Dimension:
ca. 1

Applicant's summary and conclusion

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