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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

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A total of six acute toxicity studies with freshwater fish, four acute toxicity tests and one chronic toxicity test with the freshwater invertebrate, Daphnia magna, and one toxicity test with a freshwater algae were performed using different grades of the reaction mass of divinylbenzene and ethylstyrene. Based on a review of the ecotoxicity values from the acute studies, the DVB-HP grade (approximately 80% divinylbenzene/20% ethystyrene) exhibited greater toxicity as compared to the other grades of divinylbenzene and ethylstyrene (DVB-55: approximately 55% divinylbenzene/ 45% ethylstyrene) and DVB-63: approximately 63% divinylbenzene and 37% ethystyrene). Thus, toxicity data for DVB-HP was used as a worst case approximation of toxicity for all other existing grades of the reaction mass. A 14 -day LC50 of 1.78 mg/L DVB-HP in medaka was the lowest acute endpoint for fish. For aquatic invertebrates, the lowest acute toxicity value of 1.14 mg/L DVB-HP was calculated as a geometric mean from two high quality studies with Daphnia magna. One high quality toxicity study with Selenastrum capricornutum was performed with DVB-HP. The 72-hour NOEC (based on biomass) was 0.81 mg/L DVB-HP, and the 72-hour EC50 (based on biomass) was 1.73 mg/L DVB-HP. Based on all the aquatic toxicity data for DVB-HP, the lowest acute toxicity value was 1.14 mg/L, which was based on two acute studies with Daphnia magna. The chronic toxicity values of 0.353 and 0.81 mg/L for DVB-HP were based on a 21-day NOEC(reproduction) in Daphnia magna and a 72 -hour NOEC(biomass) in Selentastrum capricornutum, respectively. The NOEC(reproduction) for Daphnia magna was the lowest toxicity value for DVB-HP and therefore, this value was used to derive predicted no effect concentrations in freshwater.