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Aquatic toxicity studies are available for several members of this category. Many of the historic aquatic toxicity studies used dilution of Water Accommodated Fraction (WAF) instead of preparing WAF from several loading rates. These studies have been given Klimisch 3 scores (not reliable). More recent studies have utilized Water Accommodated Fraction (WAF) techniques which are believed to be more reliable. However, even among WAF studies of the same substance, variable results have been observed which demonstrates the difficulty of testing these types of substances. 

Reliable studies are available for members of this category for fish (Akzo Nobel (1998a), Akzo Nobel (1999c), Inveresk (2001a), Aventis (2004), Eastman (2005), Akzo Nobel (1999e), Akzo Nobel (1999d), Safepharm Laboratories (1994)), Daphnia (Harlan Laboratories (2010f), Harlan (2010g) Harlan (2010h), Inveresk (2001b), Akzo Nobel (1998b), Eastman (2005), Akzo Nobel (1998c)) and algae (Inveresk (2001c), (Eastman (2005), Akzo Nobel (1998d), Harlan (2010i)).

The lowest LL50 determined in aquatic toxicity studies for category members is <10 mg/L and the lowest EC50 is 1.6 mg/L (acute toxicity to Daphnia). If a CSR is required, this EC50 will be used to derive the aquatic PNEC.

One member of this category (Rosin, CAS 8050 -09 -7) is on Annex I of the DSD but does not have an environmental classification. The lowest acute effects were observed at 1.6 mg/L. Based on this value the members of this category would not have an acute classification for the environment. Members of this category have been shown to be readily biodegradable. Therefore, a chronic classification is also not warranted.

Members of the category Rosin, hydrogenated rosin and their salts are therefore not classified for the environment