For further processing only. Others Tris Tris 3.2.15.1.2.1 crystallizate 77-86-1 en Use Tris as a buffer in diagnostic reagents, especially in tests for aminotransferases or γ-glutamyltransferase. en Buffer for diagnostic tests, such as tests for aminotransferases. en Appearance: colorless crystals, free from smell Appearance of the aqueous solution: colorless, clear, without particles pH-value (c=0.6%; w/v): 10.0-11.0 Melting point: +168 to +171°C Conductivity (c=0.2 mol/L): ≤110 μS/cm Flowability: corresponds Absorbance at 300 nm (c=10%; w/v): ≤0.031 Absorbance at 405 nm (c=10%; w/v): ≤0.004 Chloride: ≤20 ppm Heavy metals (lead, Pb): ≤1 ppm Oxidizing substance: not detactable Reducing substances (≤ 3.0 mL KMnO4 solution 0.002 mol/L / 100 mg): corresponds Iron (AAS): ≤1 ppm Arsene (AAS): ≤1 ppm Magnesium (AAS): ≤2 ppm Calcium (AAS): ≤3 ppm Sulfate ash: ≤0.05 % Water content (Karl-Fischer): ≤0.5% Microbiological test: corresponds Assay acidimetric (based on anhydrous substance): 99.5-100.5% Stability: At +15 to +40°C within specification range for 24 months. Store in tightly closing containers, dry and protect from light. en

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