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SCCS/1596/18 Final Opinion on Colloidal Silver (nano) __________________________________________________________________________________________ M_ICPMS M_ICPMS M_ICPMS M_ICPMS M_ICPMS C_COLOUR C_COLOUR C_PHY C_ISE M_ICPMS M_ICPMS M_ICPMS C_GRAV C_COLOUR C_GRAV M_ICPMS C_NEPH M_ICPMS Additional information IRONDI_2 IRONTO_2 LEADTO_2 MAGNESTO_ 2 MANGANTO_ 2 NITRATE_N NITRITE_N ODOUR_DN PH POTASSTO_2 SILVERTO_2 SODIUMTO_2 SS_105 SULPHATE TDS_180 TOT_HARD TURBIDITY ZINCTO_2 Iron (Dissolved) <0.018 Iron <0.018 Lead <5.00 Magnesium <0.200 Manganese <0.004 Nitrate 1.220 Nitrite 0.038 Odour (Quantitative) 0 pH 8.46 Potassium <0.750 Silver 14000.00 Sodium <2.500 Solids (Suspended 1.0 at 105C) Sulphate 0.84 Solids (Total <0.00 Dissolved at 180C) Hardness (Total) 0.97 Turbidity 1.12 Zinc 10 mg/l mg/l ug/l mg/l mg/l mg/l as N mg/l as N Diln. No. pH Units mg/l ug/l mg/l mg/l mg/l mg/l mg/l as CaCO3 FTU ug/l For colloidal silver dispersion I, detailed information on purity has been submitted. Purity has been analysed using two different methods, i.e. using an EDX (Energy Dispersive X-ray) analyser or by FTIR (Fourier Transform Infrared) spectroscopy. The dispersion contains only silver particles, no other elements have been found. Furthermore, addition of organic compounds has been excluded. Ref.: 50 SCCS comment: According to SCCS 1484/12, information on full chemical composition of each nanomaterial must be provided. For dispersion (E), detailed information on constituents was provided. Additional information on dispersion I was provided in a later stage. However, similar data should be provided for all colloidal silver dispersions under consideration. This should include purity (total silver and any impurities), concentration (colloidal particles in ppm and ionic silver in ppm), any coatings or surface modifications, any doping materials, whether or not the particles were encapsulated, and any dispersing agents, or other additives/ formulants e.g. stabilisers used. Global statements such as “traces of heavy metals were quantified by a testing laboratory with satisfactory results” and “impurities endangering the human health are not identified” should be supported by data. Ag4N (dispersions A, B, C and D) describes the quality of silver in terms of limits of various metallic and non-metallic impurities (http://www.espimetals.com/index.php/online- catalog/439-Silver). 3.1.6. Solubility Seven Applicants stated that solubility in water is unlimited (A, B, C, D, J, K, L). Ref.: 1, 4, 7, 10 Additional information Additional information for these dispersions is that the solubility is below 0.01 mg/l. Ref.: 14 11PDF Image | Consumer Safety SCCS OPINION ON Colloidal Silver (nano)
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