Clemastine API
Clemastine is a first-generation antihistamine used primarily for the symptomatic relief of allergic conditions such as allergic rhinitis, urticaria and other histamine-mediated allergic reactions. Clemastine is commonly supplied in pharmaceutical formulations as clemastine fumarate.
Product Highlights
- Generic Name: Clemastine
- Common Pharmaceutical Form: Clemastine Fumarate
- CAS No. (Clemastine): 15686-51-8
- CAS No. (Clemastine Fumarate): 14976-57-9
- Category: Active Pharmaceutical Ingredient
- Therapeutic Class: Antihistamine
- Pharmacological Class: H1 Histamine Receptor Antagonist
- Appearance: White to almost white crystalline powder
- Molecular Formula (Clemastine): C21H26ClNO
- Molecular Weight (Clemastine): 343.89 g/mol
- Molecular Formula (Clemastine Fumarate): C25H30ClNO5
- Molecular Weight (Clemastine Fumarate): 459.96 g/mol
Applications
Clemastine is used as an antihistamine in pharmaceutical formulations for the management of:
- Allergic rhinitis
- Urticaria
- Allergic skin reactions
- Histamine-mediated allergic symptoms
Detailed Specifications
| Parameter |
Specification |
| Appearance |
White to off-white crystalline powder |
| Assay (HPLC) |
98.0% – 102.0% |
| Loss on Drying |
NMT 0.1% |
| Residue on Ignition |
NMT 0.2% |
| Heavy Metals |
NMT 10 ppm |
| pH (1% Solution) |
5.5 – 6.5 |
| Water Content |
NMT 0.5% |
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