One-salt ammonium phosphate, monoammonium phosphate experimental technical description

**Ammonium Dihydrogen Phosphate (Monoammonium Phosphate)** **Common Names:** - Ammonium dihydrogen phosphate - Monobasic ammonium phosphate - Monoammonium phosphate - Ammonium biphosphate - Primary ammonium phosphate - Ammonium acid phosphate **CAS Number:** 7722-76-1 **Molecular Formula:** NH₄H₂PO₄ **Molecular Weight:** 115.03 g/mol **Purity:** ≥99.5% (GR grade) **Appearance:** White crystalline powder **Solubility:** Slightly soluble in ethanol, insoluble in ether; highly soluble in water. **pH Value (50g/L, 25°C):** 4.0 – 4.5 **Clarity Test:** Qualified **Impurities:** - Chloride: ≤0.00025% - Alkali Metals: ≤0.1% - Sulfur Compounds: ≤0.0025% - Heavy Metals: ≤0.0005% - Nitrate: ≤0.001% - Arsenic: ≤0.0005% - Iron: ≤0.0005% **Physical Properties:** - Density: 1.80 g/cm³ - Melting Point: 190°C - Refractive Index: 1.525 **Stability:** Stable in air. **Applications:** Used in biochemical research, buffer preparation, culture media formulation, and as a raw material for producing phosphates, phosphors, flame retardants for wood, paper, and textiles. Also used in dry chemical fire extinguishers. **Storage:** Store at room temperature (RT). This high-purity compound is ideal for laboratory and industrial use where accuracy and consistency are essential. Its acidic aqueous solution makes it suitable for various chemical processes requiring pH control. Always handle with care and follow standard safety protocols.

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