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Calamine Powder, USP/NF Grade
Calamine is a fine, pale-pink mineral powder composed primarily of zinc oxide (ZnO) combined with a small proportion of ferric oxide (Fe₂O₃), typically around 0.5%. The ferric oxide content gives the material its characteristic soft pink coloration, distinguishing it from pure white zinc oxide. The powder is dry, smooth, odorless, and features a uniform particle size suitable for blending and dispersion in manufacturing processes.
This grade meets USP/NF specifications and contains not less than 98% zinc oxide after ignition (CAS 8011-96-9; formula ZnO Fe₂O₃). It is insoluble in water and soluble in acids, remaining chemically stable under normal storage conditions. The material is non-flammable, non-reactive, stable even under fire conditions, synthetic in origin, and supplied as a free-flowing solid.
For optimal storage, keep in a tightly closed container in a cool, dry location between 15–25 °C (59–77 °F), protected from direct sunlight and excessive heat or humidity. Standard personal protective equipment including safety glasses, gloves, and a dust respirator is recommended during handling. The product is non-regulated for ground transport (D.O.T.).
Product Specifications
| Product Name | Calamine Powder, USP/NF Grade |
| CAS Number | 8011-96-9 |
| Chemical Formula | ZnO Fe₂O₃ |
| Grade | USP/NF |
| Appearance | Fine, pale-pink powder |
| Odor | Odorless |
| Composition | Primarily zinc oxide with approximately 0.5% ferric oxide |
| Zinc Oxide Content | Not less than 98% after ignition |
| Solubility | Insoluble in water; soluble in acids |
| Origin | Synthetic |
| Physical Form | Free-flowing solid powder |
| Storage Conditions | Store at 15–25 °C (59–77 °F) in a tightly closed container, protected from sunlight, heat, and humidity |
| Transportation | Non-regulated for ground transport (D.O.T.) |
Applications and Benefits:
- Suitable for laboratory applications.
- Used as a raw material in manufacturing processes.
- Uniform particle size supports blending and dispersion.
- Free-flowing powder for convenient processing.
- USP/NF grade quality for controlled industrial use.
- Chemically stable under normal storage conditions.
- Non-flammable and non-reactive material.
Caution:
Warning. Causes mild skin irritation (H316) and eye irritation (H320). Very toxic to aquatic life (H400). Avoid release to the environment and prevent material from entering drains, soil, or waterways. Use appropriate personal protective equipment including safety glasses, gloves, and a dust respirator when handling. Store in a tightly closed container in a cool, dry location. For laboratory and manufacturing use only. Not for food, drug, or household use. Keep out of reach of children.
Menthol Crystals USP/BP
Synthetic racemic menthol in crystalline form, conforming to USP and BP pharmacopoeial standards. Composed of a 1:1 mixture of D-menthol and L-menthol enantiomers, with specific optical rotation between −2° and 2°, indicating optical inactivity. These crystals are white or colorless with a characteristic peppermint aroma and mild cooling effect (~50% intensity compared to pure L-menthol). Exhibits melting points of 28 °C or 38 °C due to dual crystal forms. Very slightly soluble in water, readily soluble in ethanol, volatile oils, and other organic solvents. Used in topical analgesics, lozenges, decongestants, oral care, cosmetics, food, and industrial applications. Manufactured synthetically under GMP conditions and intended for cost-effective formulations not requiring full L-menthol potency.
Product Specifications
| Chemical Name | DL-Menthol (Racemic Menthol) |
| Synonyms | (±)-Menthol, dl-Menthol, Mentholum racemicum |
| CAS Number | 89-78-1 / 1490-04-6 |
| Molecular Formula | C₁₀H₂₀O |
| Specific Rotation | −2° to 2° (optically inactive) |
| Melting Point | 28 °C or 38 °C |
| Appearance | White crystalline powder or colorless needle-like crystals |
| Odor | Characteristic peppermint |
| Solubility | Slight in water; readily soluble in ethanol and oils |
| Origin | Synthetic |
Applications and Benefits:
- Topical formulations: creams, gels, ointments
- Throat lozenges and nasal inhalers
- Chewing gum, candies, and flavorings
- Toothpaste and mouthwash
- Shampoos, body washes, and lotions
- Cigarette and tobacco flavoring
- Cooling agents and fragrance intermediates
Caution:
Avoid contact with eyes, skin, and mucous membranes. May cause irritation. Use with proper ventilation and personal protection. Store in a dry, cool area in tightly closed containers between 15 °C and 30 °C. Do not substitute for L-menthol in formulations requiring pure enantiomer. Keep away from oxidizing agents, acids, bases, and ignition sources.
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