Sodium Citrate Tribasic Dihydrate (Molecular Biology Grade) is a source of Citric acid, a key metabolic intermediate. Citrate is the starting point of the tricarboxylic acid cycle. Its concentration also coordinates several other metabolic pathways. Citric acid can form complexes with various cations, particularly with iron and calcium. In animals, citric acid improves the utilization of nutritional calcium.
Preparation Instructions: One gram of sodium citrate dissolves in 1.3 ml of water at 25 °C and in 0.6 ml of boiling water. Poorly soluble in alcohol.
pH: 7.5 - 9.0 (0.1 M in H2O, 25°C)
Storage/Stability: Citrate buffers (pH 3-5) exhibit excellent stability at room temperature. Dilute solutions of citric acid (non-sterile) may ferment if left at room temperature. Non-sterile solutions should be stable for months stored at 2-8 °C.
Soluble in water (29.4 g/L at 20 °C). Insoluble in alcohol.
Store at room temperature
>300° C (lit.)
309.6° C at 760 mmHg
n20D ~1.58 (Predicted)
pKa: pK1: 3.14, pK2: 4.76, pK3: 6.40
For Research Use Only. Not Intended for Diagnostic or Therapeutic Use.
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