Classification of Red Phosphorus part II prepared for ECB meeting 28Feb2001

1
Classification of Red Phosphorus - part
IIprepared for ECB meeting 28-Feb-2001

• Supplementary material for the application to
  revise the classification of red phosphorus (R51
  / R53 / N) ECBI / 09 / 00 Add.1-IIClariant
  GmbH, Sulzbach, Germany Dr. Adrian
  BeardItalmatch Chemicals S.p.A., Genova,
  Italy Dr. Silvestro Costanzi

2
Results of meeting 25-Sep-2000

• agreement on differentiation red vs. white
  phosphorus
• loading rate approach for the toxicity tests was
  accepted
• additional tests were asked for
• 7 day hydrolysis
• at pH 8
• all three species (fish, algae, daphnia)
• documentation on representativeness of particle
  size distribution was requested
• the toxicity tests were carried out and missing
  information gathered -this is a presentation of
  the results, you find the details in the
  attachments

3
Attachments list

• 1. Danio rerio (fish) toxicity test report
• 2. Daphnia magna (water flea) toxicity test
  report
• 3. Desmodesmus subsp. (alga) toxicity test report
  (draft)
• 4. Particle size distributions for Clariant
  product reports from 20 measurements
• the file contains data on the batch that was
  used for toxicity testing (type SF) as well as 20
  measurements on the red phosphorus product Exolit
  RP 601 which is regularly analyzed for size
  distribution. It is made from the red phosphorus
  type SF by addition of 0,5 dust suppressant.

4
Toxicity Tests Results

• Fish (Danio rerio) LC 50 33 mg / L
• Daphnia (Daphnia magna) EC 50 10.5 mg / L
• Algae (Desmodesmus subspicatus) EbC 50 9.5 mg /
  L
• the resulting classification should be R51 /
  R53 / N

5
Toxicity Tests Conditions

• GLP-tests were carried at Aventis Pharma ProTox,
  Hattersheim, Germany
• hydrolysis time 7 days
• pH
• was regularly monitored and adjusted to pH 8
  during hydrolysis
• at the end of toxicity tests 7.6 ... 7.9
  (Daphnia) 7.3 ... 7.5 (Danio)8.4 ... 10.6
  (Desmodesmus)
• individual batches were prepared for each test
  concentration(instead of dilutions from one
  stock solution)

6
Particle Size Distribution - Tox Sample

• d50 18.5 µm

7
Particle Size Distribution - Clariant
this comparison shows that the sample used for
toxicity testing was quite representative of
commerical red phosphorus
see attachment 4for details
8
Particle Size Distribution
P-red Distribution of average particle size
(d50)ITC statistics for Y 2000 based on 140 lots