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Mannitol

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Description

Mannitol

MF: C6H14O6
MW: 182.17
This product is D-mannitol . Calculated on dry goods , including C6H14O6 should be 98.0 ~ 102.0% .
Properties:white crystalline powder ; odorless, sweet .
This product is soluble in water, in ethanol or ether almost insoluble.
Melting point melting point of this product ( Appendix Ⅵ C) to 166 ~ 170 ℃.
Identification:
(1) To about 0.5g, test tube , add acetyl chloride 3ml, slowly dropping pyridine 0.5ml, with
Dropwise with shaking , the reaction is completed once , pay attention to the solution was transferred to another tube , with ice -cooling, the precipitated crystals were filtered ,
After washing with ether 10ml , removal test tube, add ether 15ml, set a warm water bath heated to dissolve , hot dip take the ether
Liquid vaporized ether to give white crystals ( recrystallized again when necessary, 1 ) , after drying , determined by law ( Appendix Ⅵ C),
A melting point of 120 ~ 125 ℃.
(2) to take this product a saturated aqueous solution 1ml, add ferric chloride solution and sodium hydroxide solution each 0.5ml, which generates
Brown precipitate , shaking does not disappear ; dropping an excess of sodium hydroxide solution , which dissolved into a brown solution .
(3) The infrared absorption spectrum should control of the spectrum ( spectral set 84 Figure ) consistent .
Category:dehydration, diuretics.
Storage:Sealed.

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