4-Aminobenzoic acid PABA
Appearance: Aminobenzoic acid is a white crystalline solid.
Solubility: It is easily soluble in water and can also be dissolved in organic solvents such as ethanol and ether.
Chemical properties: Aminobenzoic acid is a weak acid that can react with bases to form salts.
Description: Colorless needle shaped crystals. It turns light yellow in the air or under light. Light yellow in exposed air and light. Easy to dissolve in boiling water, soluble in alcohol, ether, and glacial acetic acid, slightly soluble in water and benzene.
| INDEX |
STANDARD |
| Melting range |
186-189°C |
| Volatile diazoizable substances |
Not more than 0.002% |
| Loss on drying |
Not more than 0.2% |
| Residue on ignition |
Not more than 0.1% |
| Heavy metals |
Not more than 0.002% |
| Assay |
98.5-101.5% |
| Ordinary impurities |
<1% |
Application:
1. Medical field: Aminobenzoic acid is a commonly used ingredient in over-the-counter drugs, commonly used to treat symptoms such as headaches, fever, and arthritis.
2. Cosmetic field: Aminobenzoic acid can be used as a sunscreen ingredient in cosmetics, which has the effect of preventing UV damage.
3. Dye and pigment industry: Aminobenzoic acid is commonly used to synthesize dyes and pigments, and is used to dye textiles, leather, and paint materials.
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