18016-24-5

White or almost white, crystalline or granular powder.

Dissolve it in H2O, filter and precipitate it by adding MeOH. Filter off the solid and dry it in a vacuum at 85o. Alternatively, dissolve it in H2O, filter (from insoluble inorganic Ca) and evaporate it to dryness under vacuum at 85o. [March et al. J Am Pharm Assoc 41 366 1952, Beilstein 3 IV 1255.]