Blue dextran 2000 1011700 [9049325

Prepared from dextran having an average relative molecular mass of 2 x 106 by introduction of a polycyclic chromophore that colours the substance blue. The degree of substitution is 0.017. It is freeze-dried and dissolves rapidly and completely in water and aqueous saline solutions.

A 1 g/l solution in a phosphate buffer solution pH 7.0 R shows an absorption maximum (2.2.25) at 280 nm.

Boldine. C19H21NO4. (Mr 327.3). 1118800. [476-70-0]. 1,10-Dimethoxy-6aa-aporphine-2,9-diol.

A white crystalline powder, very slightly soluble in water, soluble in alcohol and in dilute solutions of acids.

[a]^5 : about + 127, determined on a 1 g/l solution in ethanol R.

Chromatography. Examined as prescribed in the monograph on Boldo leaf (1396) the chromatogram shows a single principal spot.

Assay. Examine by liquid chromatography (2.2.29) under the conditions described in the monograph on Boldo leaf (1396) using the substance to be examined as the test solution.

The area of the principal peak is not less than 99.0 per cent of the total area of the peaks.

Boric acid. 1011800. [10043-35-3]. See Boric acid (0001).

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