Reaction products of methacrylic acid and 2,2'-[(1-methylethylidene)bis(4,1-phenyleneoxymethylene)]bisoxirane

Ecotoxicological Summary

Hazard for aquatic organisms

Freshwater

Hazard assessment conclusion:

no hazard identified

Marine water

Hazard assessment conclusion:

no hazard identified

STP

Hazard assessment conclusion:

PNEC STP

PNEC value:

10 mg/L

Assessment factor:

10

Extrapolation method:

assessment factor

Sediment (freshwater)

Hazard assessment conclusion:

no exposure of sediment expected

Sediment (marine water)

Hazard assessment conclusion:

no exposure of sediment expected

Hazard for air

Air

Hazard assessment conclusion:

no hazard identified

Hazard for terrestrial organisms

Soil

Hazard assessment conclusion:

no exposure of soil expected

Hazard for predators

Secondary poisoning

Hazard assessment conclusion:

no potential for bioaccumulation

Conclusion on classification

Based on the results of the readily biodegradability study, Small Vinyl Ester is considered not readily biodegradable. In addition, the log Pow of Small Vinyl Ester is 4.63. However, since no acute toxicity was recorded at levels up to the limit of water solubility, a classification under DSD is not considered applicable.

For GHS, the Safety Net Classification (Chronic Category 4) was evaluated, because Small Vinyl Ester is a poorly soluble substance for which no acute toxicity is recorded at levels up to the water solubility, and which is not rapidly degradable and has a log Kow = 4, indicating a potential to bioaccumulate. According to CLP, no safety net classification is required if other scientific evidence exists showing classification to be unnecessary. Such evidence includes chronic toxicity NOECs > water solubility or > 1 mg/L. Since the measured NOEC to algae was 1.1 mg/L (based on growth rate), no classification in Chronic Category 4 is required.

The relevant PBT (persistent, bioaccumulative, toxic) criteria according to the REACH regulation and the corresponding properties of Small Vinyl Ester are compiled in the following table:

 

PBT and vPvB criteria and the corresponding properties of Small Vinyl Ester

Criterion	PBT criteria	vPvB criteria	Small Vinyl Ester	Criterion fulfilled?
P	Half-life in marine water > 60 d, or half-life in fresh or estuarine water > 40 d, or half life in marine sediment > 180 d, or half-life in fresh or estuarine sediment > 120 d, or half-life in soil> 120 d	Half-life in marine, fresh or estuarine water > 60 d, or half life in marine, fresh or estuarine sediment > 180 d, or half-life in soil > 180 d	The half-life of Small Vinyl Ester in water is 37 d.	No
B	BCF > 2000	BCF > 5000	Modelled BCF is 292.4 based on a measured Log Kow of 4.63.	No
T	Long-term NOEC for marine or fresh water organisms < 0.01 mg/L	n.a.	Only available EC50of > 1.1 mg/L for short-term toxicity in aquatic species (other NOECs of EC50 are nominal). No toxicity observed, limitations to test concentration due to low solubility of Small Vinyl Ester in the test medium.	No
T	CMR	n.a.	No data available (testing proposal).	No
T	Other evidence of chronic toxicity as identified by the classifications: T, R48, or Xn, R48, according to Directive 67/548/EEC	n.a.	No relevant classification and limited data available (testing proposal).	No

 

The table demonstrates that the substance does not fulfill the P or vP criteria.

The table demonstrates that the substance does not fulfill the B or vB criteria.

The table demonstrates that the substance does not fulfill the T criteria.

 

A substance is identified as a PBT substance if it fulfills all three PBT criteria described above. These criteria are not fulfilled, and therefore the substances cannot be classified as PBT.

 

A substance is identified as a vPvB substance if it fulfills both vPvB criteria described above. The P and the B criteria are not fulfilled.

 

Small Vinyl Ester is neither a PBT nor a vPvB substance.