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EC number: 269-052-1
CAS number: 68186-90-3
This substance is identified in the Colour Index by Colour Index Constitution Number, C.I. 77310.
The 24 h screening measurements were
performed with a concentration of the test item of 100 mg/l. At pH =
6.0, the concentrations of Cr were mainly below LOD (0.009 µg/L) and 1.9
µg/L Sb were found in the solution, after 24 hours of leaching time. The
same procedure was performed at pH = 8.5 and the concentration of Cr and
Sb were found to be 0.2 and 2.2 µg/L, respectively. Therefore, the full
tests were conducted at the most relevant pH with respect to
ecotoxicology, i.e. at pH 8.5. Slight
chromium and antimony background concentrations were measured. If
dissolved metal amounts of test item loaded samples were in the range of
background levels, the mean background concentrations per
day were additionally subtracted.
The results are presented in following
Table 1: Mean chromium and antimony concentrations
at a loading rate of 1 mg/L
Sample time [h]
Metal average concentration at a loading rate of 1 mg/L
*data corrected for elemental
background in method blanks
Table 2: Mean
chromium and antimony concentrations at a loading rate of 10 mg/L
Metal average concentration at a loading rate of 10 mg/L
Table 3: Mean chromium and antimony concentrations
at a loading rate of 100 mg/L
Metal average concentration at a loading rate of 100 mg/L
Table 4: Full test - Relevant
dissolved (0.2 µm filtration) Sb concentrations in method blanks
Chrome antimony titanium buff rutile (Sicotan Yellow K 2011) is practically insoluble in water (<0.1 mg/L at 20 °C). In addition, the extent to which chrome antimony titanium buff rutile can produce soluble available ionic and other metal-bearing species in aqueous media is limited. According to a transformation/dissolution test (OECD Series on Testing and Assessment Number 29, 2001), measured dissolved antimony and chromium concentrations (0.2 µm fraction) after 7 and 28 days at a loading of 1 mg/L at pH 8.5 (i.e. the pH which maximizes dissolution) amount for 0.07 and 0.05 µg/L chromium as well as 0.76 and 1.03 µg Sb/L antimony, respectively. At loadings of 10 and 100 mg/L test item, dissolved chromium concentrations after 7 days amounted to 0.13 and 0.28 µg Cr/L whereas dissolved antimony concentrations were determined with 2.25 and 7.73 µg Sb/L, respectively. Thus, the dissolution of chrome antimony titanium buff rutile in relevant environmental media is limited.
The substance is insoluble in water.
Transformation/dissolution of the
substance according to OECD 29:
(i): 24 h, loading 100 mg/L: 0.029
µg/L for Cr and 1.86 µg/L Sb at pH 6 and 0.19 µg/L Cr and 2.14 µg/L Sb
at pH 8.5
(ii): 7 d, loading 1, 10 and 100 mg/L
at pH 8.5: 0.07, 0.13 and 0.28 µg/L for Cr and 0.76, 2.25 and 7.73 µg/L
(iii): 28 d, loading 1 mg/L at pH 8.5:
0.05 µg/L for Cr and 1.03 µg/L for Sb
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