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Short-term toxicity to fish

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Description of key information

No effects up to the limit of water solubility (WS < 0.15 mg/L)

Key value for chemical safety assessment

Additional information

No experimental data evaluating the acute toxicity of Glycerides, C16-18 mono-, di- and tri- (CAS No. 91052-54-9) to fish species are available. Therefore, data from a structurally related analogue substance, Glycerides, C14-18 mono- and di- (CAS No. 67701-33-1) are used as read-across in accordance with Regulation (EC) No. 1907/2006, Annex XI, 1.5. Both substances are esters formed from the combination of mainly C16 and C18 fatty acids and glycerol. The behaviour of these substances in the water phase is expected to be very similar based on low water solubility values < 1 mg/L and log Kow values > 4. Based on this information, reading-across from Glycerides, C14-18 mono- and di- to Glycerides, C16-18 mono-, di- and tri- is justified.

Two studies evaluating the acute toxicity of Glycerides, C14-18 mono- and di- (CAS No. 67701-33-1) are available. The key study (Guhl, 1992) was conducted according to ISO 7346-1, under GLP conditions. Danio rerio were exposed to two concentrations of test substance (3000 and 10000 mg/L) for 96 hours within a semi-static water regime. After the exposure period, no mortality was observed in any of the treatment groups, or in the control. Therefore, the LC50 (96 h) was determined to be > 10,000 mg/L (nominal concentration). The supporting study (Richterich and Mühlberg, 2001) was performed following ISO 7346-1 as well. Danio reriowas exposed to 100, 1000 and 10000 mg test substance/L within a semi-static water regime. After 96 hours, only one fish died at a concentration of 1000 mg/L and therefore, the LC50 (96 h) was determined to be > 10,000 mg/L.

 

Based on the results obtained for the structurally related analogue substance (in accordance with Regulation (EC) No. 1907/2006, Annex XI, 1.5), no acute toxicity ofGlycerides, C16-18 mono-, di- and tri- to fish species up to the limit of its water solubility (< 0.15 mg/L) is expected.