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Name of the ingredient
Molybdenum trioxide (AAN)
Definition of the ingredient
Molecular formula: MoO3
Molar mass: 143.94
CAS Number: 1313-27-5
| Test | Method reference | Acceptance criteria |
|---|---|---|
| Description | ||
| Characteristics | ||
| Identification | ||
| Assay | ||
| Appearance | Visual | Yellow-green or grey powder |
| Loss on drying (dried to a constant weight at 100-105°C) | BP (Appendix IX D) | Not more than 0.5% |
| Solubility | BP (General Notices) | Slightly soluble in water. Soluble in concentrated mineral acids, solutions of alkaline hydroxides and ammonia |
| AAS | Ph Eur 2.2.23 | Matches spectrum of authenticated reference material |
| Molybdenum trioxide | Ph Eur 2.2.23 | 99.5-101.0% (anhydrous basis) |
| Test | Method reference | Acceptance criteria |
|---|---|---|
| Incidental metals and non-metals | ||
| Other organic or inorganic impurities or toxins | ||
| Microbiology | ||
| Notes | ||
| Heavy metals (as lead) | BP (Appendix VII) | Not more than 10 ppm |
| Arsenic | Ph Eur 2.4.2 | Not more than 10 ppm |
| Sulfates | Ph Eur 2.4.13 | Not more than 200 ppm |
| Phosphates | Ph Eur 2.4.11 | Not more than 5 ppm |
| Ammonium | BP (Appendix VII) | Not more than 20 ppm |
Ammonia insoluble matter (10g sample in 120 mL dilute aqueous ammonia) | Literature method1 | Not more than 0.01% w/w |
| While substance manufacturers are encouraged to include limits for objectionable microorganisms, it is the product into which those substances are formulated that is subject to a legally binding set of criteria. The Therapeutic Goods Order No. 77 'Microbiological Standards for Medicines' - external site mandates that any finished product that contains the ingredient, alone or in combination with other ingredients, must comply with the microbial acceptance criteria set by Clause 9 of the Order. | ||
| ||
Key to abbreviations
AAS = Atomic Absorption Spectrophotometry
BP = British Pharmacopoeia
Ph Eur = European Pharmacopoeia