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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

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Description of key information

The estimated inhibition concentration (IC50) of 1-(6-methoxy-2-naphthyl)ethan-1-one for tetrahymena pyriformis for 48 hours using QSAR toolbox version 2.3 is 108.73 mg/l.

Key value for chemical safety assessment

EC50 for microorganisms:
108.73 mg/L

Additional information

Based on the various studies available with Klimish rating 2 for the target substance CAS NO 3900-45-6 and read across substances and based on the category approach of organic functional group along with similar mechanistic approach and having structural similarities defined by QSAR toolbox. The results is summarized as follows

 

Sr.No

Endpoint

Effect values

Basis for effects

Duration

Species

Remarks

1

IC50

108.7335 mg/l

Population

48 hrs

Tetrahymena pyriformis

Predicted data for target chemical

2

IGC50

25.04128 mg/l

growth

48 hrs

 

 

Tetrahymena pyriformis

Predicted data for target chemical

3

IGC50

 

 

18.3244 mg/l

 

 

-

 

46 hrs

 

Tetrahymena pyriformis

Predicted data for target chemical

4

IGC50

17 mg/l

growth inhibition

48 hrs

 

 

Tetrahymena pyriformis

Data from publication for CAS no 93-04-9

 

By applying weight of evidence approach to the studies summarized in the above table it can be observed that IGC50 value is expected to be in the range of 17-108.7335 mg/l in 46 to48 hrs study.