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Ecotoxicological information

Toxicity to microorganisms

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Description of key information

Key value for chemical safety assessment

EC50 for microorganisms:
120 mg/L
EC10 or NOEC for microorganisms:
1 mg/L

Additional information

Two activated sludge respiration inhibition studies were carried out on NaPT and and Ec10 value of 1.0 mg/L was determined.

Table 4.2.1- 15: Inhibition of microbial activity (aquatic) by NaPT

Guideline /
Test method

Species / Inoculum

End-point /
Type of test

Exposure

Results

[mg/L]

Remarks

Reference

design

duration

EC10

EC50

NOEC

 

 

OECD 209

Activated sludge

Respiration inhibition

 

3 hours

-

1.81

 

-

 

6.1.7.001

ESPTF 7041-401

Weniger (2002)

 

OECD 209

Activated sludge

Respiration inhibition

 

3 hours

1.0

120

 

-

 

6.1.7.002

EZPTF 7041-402

Flackler (1990)

The information contained within this robust summary document comes from studies which are in the ownership of Arch Chemicals Inc. and which are protected in several regions globally. This information may not be used for any purpose other than in support of the Chemical safety Report submitted by Arch Chemicals Inc. under RegulationEC 1907/2006.