Table 3.
Specificity of the colorimetric test to common excipients and other antimicrobials
| Compound | Acetic acid extract | Sulfuric acid treatment |
|---|---|---|
| Excipients | ||
| Microcrystalline cellulose | Colorless | − |
| Croscarmellose | Colorless | Colorless |
| Fumarate | Colorless | Colorless |
| Talc | Colorless | Colorless |
| Lactose | Colorless | Colorless |
| Starch | Colorless | Colorless |
| SiO2 | Colorless | Colorless |
| Mg stearate | Colorless | White precipitant |
| Dihydroartemisinin | Colorless | Orange/red |
| Artesunate | Colorless | Red |
| Artemether | Colorless | Orange/red |
| Artemisinin | Colorless | Yellow/orange |
| Sulfamethoxazole | Colorless | Colorless |
| Acetaminophen | Colorless | Colorless |
| Aspirin | Colorless | Colorless |
| Pyrimethamine | Colorless | Colorless |
| Trimethoprim | Colorless | Colorless |
| Chloroquine | Colorless | Colorless |
| Chloramphenicol | Colorless | Colorless |
| Erythromycin | Colorless | Black |
| Ciprofloxacin | Colorless | Colorless |
| Primaquine | Yellow/orange | Weak yellow |
| Ampicillin | Colorless | Colorless |
| Sulfadoxine | Colorless | Colorless |
| Tetracycline | Yellow/orange | Orange |
| Mefloquine | Colorless | Colorless |
| Amoxicillin | Colorless | Colorless |
| Piperaquine | Colorless | Colorless |
| Amodiaquine | Weak yellow | Weak yellow |
| Lumefantrine | Yellow | Yellow |