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HEPES

HEPES

Formedium

£632.21

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C8H18N2O4S=238.3 Specifications HEPES 99.5% Loss on Drying (105 C° 4hr) 0.5% Water Content (By KF) 0.5% Infrared Complies pH 1% in water 4.8-5.6 (25°C) Solubility 1M in water Clear and colourless solution Residue on ignition 0.1% A260, 1M in water 0.045 A280, 1M in water 0.035 A420, 1M in water 0.20 Heavy Metals 5 ppm pKa at 20°C 7.35-7.69 Store dry at room temperature Soluble in water CAS 7365-45-9

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The part other shops don't tell you. Three separate questions, kept separate on purpose, each with its source.