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Environmental fate & pathways

Additional information on environmental fate and behaviour

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Administrative data

Endpoint:
additional information on environmental fate and behaviour
Type of information:
experimental study
Adequacy of study:
supporting study
Reliability:
4 (not assignable)

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2003

Materials and methods

Test guideline
Qualifier:
equivalent or similar to
Guideline:
other: OECD 29: Transformation/Dissolution of Metals and Metal Compounds in Aqueous Media
GLP compliance:
no

Test material

Reference
Name:
Unnamed
Type:
Constituent
Type:
Constituent

Results and discussion

Any other information on results incl. tables

Acute (7-day) and Chronic (28-day) Transformation/Dissolution Test Results for a Commercially Representative Nickel Metal Powdera 

Length of testing (days)

pH

Loading (mg Ni/L)

 

Dissolution Values (mg Ni/L)

 

7

6

1

0.0017*

7

6

10

0.024*

7

6

100

0.350*

7

8

1

0.003f

7

8

10

0.029f

7

8

100

0.28f

28W

5.8

1

0.0039

28b

6

1

0.0023

28q

8

1

0.0035

aTested powder is the smallest representative size powder on the EU market. This is in accordance with the guidelines in the United Nations Globally Harmonized System for the material to be tested as representative of metal powders for classification.

* Results from using the current draft OECD Transformation/dissolution Protocol (OECD, 2001) (Skeaff and Hardy, 2003a)

f  Results from using the initial draft protocol for T/D (Skeaff and Paktunc, 1996) (Skeaff and King, 1998); test conditions at pH 8 are the same as the current draft OECD TDP (OECD, 2001), whereas the CO2conditions are different for the two protocols for pH 6 (Skeaff and King, 2002).

WTests were conducted at pH 5.8 (target was pH 5.5) (Skeaff and Hardy, 2003c), prior to the change to pH 6 for the validation of the OECD protocol. The pH 5.8 and pH 6 tests were conducted in 20X and 10X diluted OECD 203 media, respectively.

b  Tests were conducted at pH 6 using the current draft OECD T/D protocol (Skeaff and Hardy, 2003b); this data should be compared with the pH 6 chronic toxicity reference value for chronic classification of nickel powder.

qTests were conducted at pH 8 using the current draft OECD T/D protocol (Skeaff and King, 1998); this data should be compared with the high pH (>8) chronic toxicity reference value for chronic classification of nickel powder.

Acute (7-day) Transformation/Dissolution Test Results for Nickel Metal Granules (Massives)

 

Length of testing (days)

pH

Loading (mg Ni/L)

 

Dissolution Values (mg Ni/L)

 

7

6

10

0.0049

7

6

100

0.08

 

Applicant's summary and conclusion