Mannitol is a sugar alcohol with the chemical formula C6H14O6. It is easily soluble in water and is a white crystalline powder with a sweet taste similar to sucrose. It is a high osmotic pressure dehydrating agent commonly used in clinical practice to reduce intracranial pressure, alleviate brain edema, and lower blood viscosity in patients.
It is widely use in many fields like the following:
Mannitol is mainly used to treat brain edema caused by various reasons, and to prevent brain herniation by reducing intracranial pressure. In addition, mannitol also has the effect of lowering intraocular pressure and can be used to treat diseases with elevated intraocular pressure. It can also be used as an osmotic diuretic to distinguish oliguria caused by pre renal factors or acute renal failure, and to prevent acute tubular necrosis. Mannitol is also used as an adjuvant diuretic therapy for diseases such as nephrotic syndrome, cirrhosis, and ascites. It should be noted that mannitol injection can be used after crystallization, but the crystals must be dissolved first, and it is contraindicated for those who are allergic to mannitol to prevent allergic reactions.
There are some precautions to follow when using mannitol. Firstly, mannitol injection is prone to crystallization at low temperatures, so the crystals should be completely dissolved before use. Secondly, mannitol is mainly used for intravenous injection and is not recommended for oral use unless it is used as a preoperative or pre-test intestinal cleansing agent. Finally, patients should follow the doctor's advice on medication and avoid blind use, especially for patients with acute tubular necrosis, severe dehydration, etc., it should be contraindicated to prevent worsening of the condition.
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Feature of Crystalized mannitol:
- Crystalline mannitol is a white crystalline powder that is easily soluble in water, has a sweet taste, absorbs heat when dissolved, and has no hygroscopicity. It is an isomer of sorbitol, a straight chain alkyl alcohol containing six hydroxyl groups, commonly used as a racemic form.
- Crystalline mannitol is prone to form crystals at low room temperature, but the crystals will dissolve on their own when left at room temperature or heated.
- Mannitol has multiple uses. As a high osmotic pressure dehydrating agent, it is commonly used in clinical practice to reduce intracranial pressure, alleviate brain edema, alleviate neurological damage, and lower blood viscosity in patients. In addition, it can also serve as an oxygen free radical scavenger, clearing the increase of oxygen free radicals caused by aseptic inflammation of the surrounding tissues of nerve roots in the spinal canal, reducing the damage of pathological oxygen free radicals to cell membranes, and playing a role in reducing swelling and anti-inflammatory effects.
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Specification of Crystalized mannitol:
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TEM |
STANDARD |
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APPEARANCE |
White crystalline powder |
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Assay |
98.0~102.0 % |
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Less on drying |
≤0.5 % |
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Specific optical rotation |
+137~+145 |
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Acidity |
Pass the test |
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Burning residue |
≤0.1 % |
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Reducing sugar |
Pass the test |
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Chloride |
≤0.003 % |
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Sulfate |
≤0.01 % |
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Oxalate |
≤0.02 % |
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Heavy metals |
≤0.001 % |
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Arsenic |
≤0.0002 % |
Production of Crystalized mannitol:
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