Chromium (III) hydroxide

Particle size distribution (Granulometry)

Link to relevant study record(s)

Reference

Endpoint:

particle size distribution (granulometry)

Type of information:

experimental study

Adequacy of study:

key study

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

study well documented, meets generally accepted scientific principles, acceptable for assessment

Justification for type of information:

Performed on oven-dried material (but may still contain water of crystallisation) in laboratories of manufacturer to accepted scientific methods.

Qualifier:

equivalent or similar to guideline

Guideline:

OECD Guideline 110 (Particle Size Distribution / Fibre Length and Diameter Distributions - Method A: Particle Size Distribution (effective hydrodynamic radius)

Version / remarks:

Seiving methods

Principles of method if other than guideline:

In view of the physical nature of the product, it was only possible to go down to a 60 micron mesh.

GLP compliance:

no

Type of method:

sieving

Type of particle tested:

primary particle

Type of distribution:

mass based distribution

Specific details on test material used for the study:

The product is dried at 105 C to constant weight.Batch number of test material : A-09-3004

Mass median aerodynamic diameter:

> 60 - < 250 µm

Key result

Percentile:

other: ca 80%

Mean:

> 60 - < 250 µm

Remarks on result:

other: Not possible to apply statistics

Conclusions:

Oven-dried material typical 60 - 250 µm

Executive summary:

Note that this is academic as partical size will depend on how dry commercial material is and different sources of the substance made under different conditions will have different physical properties.

Description of key information

Oven-dried material typical 60 - 250 µm

Note that this is academic as partical size will depend on how dry commercial material is and different sources of the substance made under different conditions will have different physical properties.