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Mannitol USP ACS Reagent FCC Food Grade Manufacturers Suppliers

Mannitol CAS Number 69–65–8, Molecular Formula: C6H14O6, Molecular Weight: 182.17

Mannitol FCC Food Grade Specifications
D-Mannitol; Mannite; 1,2,3,4,5,6-Hexanehexol
C6H14O6 Formula weight 182.17
INS: 421 CAS: [69-65-8]

DESCRIPTION
Mannitol occurs as a white, crystalline powder or as free flowing granules consisting of D-mannitol and a small quantity of sorbitol. It is soluble in water and in pyridine, very slightly soluble in alcohol, and practically insoluble in chloroform and ether.

REQUIREMENTS
Identification:
A. Dissolve 1 g of sample in 75 mL of water. Transfer 3 mL of this solution into a 15-cm test tube, add 3 mL of a freshly prepared 1:10 catechol solution, and mix. Add 6 mL of sulfuric acid, mix again, then gently heat the tube in a flame for about 30 s. A deep pink or wine red color appears.
B. The retention time of the major peak in the chromatogram of the Assay Preparation corresponds to that in the chromatogram of the Standard Preparation as obtained from the Assay.
Assay: Not less than 96.0% and not more than 101.5% of C6H14O6, calculated on the dried basis.
Lead: Not more than 1 mg/kg.
Loss on Drying: Not more than 0.3%.
Nickel: Not more than 1 mg/kg.
pH of a 10% (w/w) Solution: Between 4.0 and 7.5.
Reducing Sugars: Not more than 0.3%.
Residue on Ignition: Not more than 0.1%.

Mannitol contains not less than 96.0 percent and not more than 101.5 percent of C6H14O6, calculated on the dried basis. The amounts of total sugars, other polyhydric alcohols, and any hexitol anhydrides, if detected, are not included in the requirements nor the calculated amount under Other Impurities.

Identification: Infrared Absorption 197K.
Melting range: between 164 and 169.
Specific rotation: between +137 and +145.
Acidity: Dissolve 5.0 g in 50 mL of carbon dioxide-free water, add 3 drops of phenolphthalein TS, and titrate with 0.020 N sodium hydroxide to a distinct pink endpoint: not more than 0.30 mL of 0.020 N sodium hydroxide is required for neutralization.
Loss on drying: Dry it at 105 for 4 hours: it loses not more than 0.3% of its weight.
Chloride: A 2.0-g portion shows no more chloride than corresponds to 0.20 mL of 0.020 N hydrochloric acid (0.007%).
Sulfate: A 2.0-g portion shows no more sulfate than corresponds to 0.20 mL of 0.020 N sulfuric acid (0.01%).
Arsenic: 1 ppm.
Reducing sugars: To 5 mL of alkaline cupric citrate TS add 1 mL of a saturated solution of Mannitol (about 200 mg). Heat for 5 minutes in a boiling water bath: not more than a very slight precipitate is formed. The amount determined in this test is not included in the calculated amount under Other Impurities.

Mannitol ACS AR Reagent Grade
HOCH2(CHOH)4CH2OH
Formula weight 182.17
CAS Number 69-65-8

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Specific rotation [α]25°/D	+23.3° to +24.3°
Reducing sugars	Passes test

Insoluble matter	0.01%
Loss on drying at 105C	0.05%
Residue after ignition	0.01%
Titrable acid	0.0008 meq/g
Heavy metals (as Pb)	5 ppm