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Diphenhydramine is an antihistamine mainly used to treat allergies. It is also used for insomnia, symptoms of the common cold, tremor in parkinsonism, and nausea. It is used by mouth, injection into a vein, and injection into a muscle. Maximal effect is typically around two hours after a dose and effects can last for up to seven hours.
Specification:
|
ITEMS |
STANDARD |
|
Characters |
White or almost white crystalline powder |
|
Solubility |
Very soluble in water, freely soluble in alcohol |
|
Identification |
A258nm/A264nm=1.2-1.4 IR: conform with the reference. The chlorides reaction |
|
Appearance of solution |
Clear: ≤BY6 |
|
Acidity or alkalinity |
≤0.5ml of 0.01M NaOH |
|
Related substances |
Impurity A≤0.5% Any other impurity ≤0.3% Total impurities≤1.0% |
|
Loss on drying |
≤0.5% |
|
Sulphated ash |
≤0.1% |
|
Assay |
99.0~101.0% (on dried basis) |
Packaging details:
|
Packaging details: |
25kg/drum with double plastic bags inside; packed in a cardboard drum or fiber HDPE drum. |
|
Storage: |
Stored in a clean, cool, dry area; keep away from moisture and strong, direct light/heat |
|
Shelf Life: |
5 years if sealed and store away from direct sun light. |
