Mannitol is a sugar alcohol, that is, it is derived from a sugar by reduction. Other sugar alcohols include xylitol or sorbitol. Aqueous solutions of mannitol are mildly acidic and sometimes such solutions are treated to raise the pH.In food industry Mannitol is can be used as a sweetener for people with diabetes. Since mannitol has a positive heat of solution, it is used as a sweetener in "breath-freshening" candies, the cooling effect contributing to the fresh feel. The pleasant taste and mouthfeel of mannitol also makes it a popular excipient for chewable tablets.

USP 30
Items	Standard	Test result
Acid degree ,ml	Max 0.3	Max 0.2
Chloride,%	Max 0.007	Max 0.001
Sulphate ,%	Max 0.01	Max 0.005
Loss on drying,%	Max 0.3	0.030
Arsenate,%	Max 0.0001	Max 0.0001
Assay,%	96.0-101.5	99.64
Melting point,℃	164.0-169.0	167.2
Reducing sugar ,ml	Negative	Negative
Specific rotation,°	+137-+145	+140
Conclusion	Conform to USP30
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