1,2-dihydroxyanthraquinone

Particle size distribution (Granulometry)

Administrative data

Endpoint:

particle size distribution (granulometry)

Type of information:

experimental study

Adequacy of study:

key study

Study period:

2016-12-21

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

2017

Report date:

2017

Materials and methods

Test guideline

Qualifier:

according to guideline

Guideline:

other: CIPAC Handbook Volume K: Analysis of Technical and Formulated Pesticides, CIPAC MT 187

Version / remarks:

2003

Deviations:

no

GLP compliance:

yes (incl. QA statement)

Type of method:

Laser scattering/diffraction

Type of particle tested:

primary particle

Type of distribution:

other: particle volume or particle mass

Test material

Test material information

Constituent 1

Reference substance name:

1,2-dihydroxyanthraquinone

EC Number:

200-782-5

EC Name:

1,2-dihydroxyanthraquinone

Cas Number:

72-48-0

Molecular formula:

C14H8O4

IUPAC Name:

1,2-dihydroxy-9,10-dihydroanthracene-9,10-dione

Test material form:

solid: particulate/powder

Details on test material:

- Appearance: solid yellow powder

Results and discussion

Particle size

Particle size 1

Key result

Percentile:

D50

Mean:

2.12 µm

St. dev.:

0.03

Remarks on result:

other: mean of two measurements

Particle size 2

Percentile:

D10

Mean:

0.73 µm

St. dev.:

0.005

Remarks on result:

other: mean of two measurements

Particle size 3

Percentile:

D90

Mean:

11.33 µm

St. dev.:

0.003

Remarks on result:

other: mean of two measurements

Any other information on results incl. tables

Particle Size Distribution:

		Measurement 1 [µm]		Measurement 2 [µm]		Average [µm]
L10D(v, 0.1)		0.736		0.729		0.73
L50D(v, 0.5)		2.142		2.100		2.12
L90D(v, 0.9)		11.337		11.332		11.33

Applicant's summary and conclusion

Conclusions:

The L10 D (v, 0.1) was determined to be 0.73 µm, the L50 D (v, 0.5) was determined to be 2.12 µm and the L90 D (v, 0.9) was determined to be 11.33 µm.

Executive summary:

The particle size distribution was determined using the laser diffraction method with wet dispersion. The particle size distribution of test item was determined following CIPAC MT 187.

Two measurements were performed. The following results were obtained: L₁₀D (v, 0.1) = 0.73 µm, L₅₀D (v, 0.5) = 2.12 µm and the L₉₀D (v, 0.9) = 11.33 µm.