For further processing only. Others Hepes Hepes 3.2.15.1.3.1 crystalline powder 7365-45-9 en Use Hepes as a buffer in reagents. en Buffer for diagnostic tests, such as amylase test. en 4-(2-Hydroxyethyl)-1-piperazineethanesulfonic acid en Appearance: White, crystalline powder Solution (238 mg/ml water): clear pK Value (37 °C): 7.21-7.41 pK Value (25 °C): 7.38-7.58 Hepes (alcalimetric): ≥97% Hepes (from N): ≥97% N (elementary analysis): ≥11.4% A260 (238 mg/ml water): ≤0.050 A405 (238 mg/ml water): ≤0.030 Cl (chloride meter): ≤0.04% Hepes (Purity check, α-amylase contamination): ≤0.1mA/min Exclusion of skin contact and contamination with salvia: Corresponds to specification. Stability: At +15 °C to +25°C within specification range for 24 months. en

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