Use of this information is subject to copyright laws and may require the permission of the owner of the information, as described in the ECHA Legal Notice.
EC number: 215-607-8
CAS number: 1333-82-0
From the EU RAR, most of the algal toxicity data have been generated
with potassium dichromate. Where comparison is possible, the toxicity of
sodium chromate or sodium dichromate, when expressed on a total chromium
basis, does not appear to be significantly different from that of
potassium dichromate. This is as would be expected if the equilibria
between the chromate and dichromate
anions are established in the test medium. Little information is
available for ammonium dichromate and chromic acid, but it would be
expected that their toxicity would be similar to that of the other
chromates/dichromates, when expressed on a total chromium concentration
The available EC50 values for algae range from 0.13 to 4.6 mg/l Cr; NOEC
values are in the range 0.01 to 0.64 mg/l Cr. With marine algae,
salinity and sulphate ion concentration have been shown to be important
factors in determining the toxicity of chromium (VI). The toxicity of
chromium (VI) is generally highest at low salinities (<2‰) and low
sulphate ion concentrations (Riedel, 1984 and 1985; Frey et al., 1983).
At higher salinities, marine alga appears to be of similar or slightly
lower sensitivity as freshwater algae.
Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice.Reproduction or further distribution of this information may be subject to copyright protection. Use of the information without obtaining the permission from the owner(s) of the respective information might violate the rights of the owner.
Welcome to the ECHA website. This site is not fully supported in Internet Explorer 7 (and earlier versions). Please upgrade your Internet Explorer to a newer version.
Do not show this message again