Reaction mass of heptachromium tricarbide and trichromium dicarbide

Surface tension

Administrative data

Endpoint:

surface tension

Data waiving:

study scientifically not necessary / other information available

Justification for data waiving:

the study does not need to be conducted because water solubility is below 1 mg/L at 20°C

Cross-reference

Reason / purpose for cross-reference:

data waiving: supporting information

Reference

Reaction mass of heptachromium tricarbide and trichromium dicarbid is only soluble in mineral acids. The solubility in water is < 0.5 mg/L (i.e. limit of quantification) based on a test according to DIN 32645.

Transformation/dissolution testing (OECD Series on Testing and Assessment Number 29, 2001) of “reaction mass of heptachromium tricarbide and trichromium dicarbide” at a loading of 100 mg/L indicates a poor solubility in environmental media since dissolved chromium concentrations remained below 1 µg/L (i.e. the limit of detection) at pH 6 and pH 8 after 24 h and at pH 6 after 7 days. Additional transformation/dissolution testing (OECD Series on Testing and Assessment Number 29, 2001) of trichromium dicarbide at a loading of 1 mg/L and at pH 6 and pH 8 resulted in chromium concentrations below respecting reporting limits (Cr: 0.5 µg/L, Cr6+: 0.05 µg/L) after 28 days.

Thus, the reaction mass of heptachromium tricarbide and trichromium dicarbide is also poorly soluble in water and environmental media.