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EC number: 202-049-5
CAS number: 91-20-3
Naphthalene has been classified
The large majority of the LC/EC50 results from aquatic short-term tests
range from 1 to 10 mg/L. In solitary cases only, the toxicity value is
lower than 1, however close to one. This suggests that in essence
classification for acute toxicity is not warranted according to CLP-Regulation(EC)
of the findings for naphthalene reported from reliable
investigations support the view that the most robust NOECs in water are
above 0.1 mg/L. Furthermore,
naphthalene proved to be readily biodegradable in a standard ready test,
while showing rapid biodegradability in numerous other water test
systems. This virtually would justify to allocate naphthalene to the
Category Aquatic chronic 3, H412, according
to CLP-Regulation(EC) No 1272/2008 rather than to Cat. Aquatic
However, the lowest but not verifiable value for a long-term endpoint(NOEC/EC10)
is reported to be at 0.020 mg/L, i.e. at least above 0.01 mg/L. This -
in combination with the biodegradation properties - would result in
Category Aquatic chronic 2, H411.
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