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| Product name | Cytosine |
| English name | Cytosine |
| Alias | 4-Amino-2-hydroxypyrimidine; 2-hydroxy-4-aminopyrimidine |
| CAS RN | 71-30-7 |
| Molecular formula | C4H5N3O |
| Molecular weight | 111.102 |
| EINECS No. | 200-749-5 |
| Structural formula |  |
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Technical index of Pharmaceutical Intermediates Cytosine
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Item
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Quality index
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Property
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White or off-white crystalline powder
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Loss on drying /（%）≤
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0.2
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Residue on ignition /（%）≤
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0.1
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Identification
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Under the Content measurement item, the retention time of the main peak of the test solution should be consistent with
the retention time of the main peak of the reference solution (± 2.5%) |
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Uracil/(%)≤
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0.25
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Maximum unknown Single impurity / (%)≤
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0.25
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Total impurity / (%)≤
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0.5
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Purity /（%）≥
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99.5
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Content / (%)
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98.0-102.0
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| Melting point | ＞300℃ |
| Uses | Used as a pharmaceutical intermediate |
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Package
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The inner package is a PE bag, and the outer package is a cardboard drum or a package according to customer requirements.
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Transportation
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Transportation tools must be clean and dry. During transportation, they should be protected from rain, Moisture , and sun, and should not be mixed with toxic, harmful, corrosive, and other pollutants. During storage and transportation, they should be handled with care. Throwing and bumping are strictly prohibited. |
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Storage and transportation
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This product should be stored tightly closed. Store in a ventilated and dry warehouse, avoid direct sunlight.
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