产地 | 美国 |
品牌 | Sigma |
货号 | 222321-500G |
用途 | 科研试验 |
包装规格 | 瓶 |
CAS编号 | 497-19-8 |
纯度 | 99.5% |
是否进口 | 是 |
222321
ACS reagent
anhydrous
200
suitable for SM 4500 - NH3
≥99.5%
powder or granules
≤0.005% silica
≤0.01% insolubles
≤1.0% loss on heating, 285 °C
12 (25 °C, 106 g/L)
851 °C (lit.)
chloride (Cl-): ≤0.001%
phosphate (PO43-): ≤0.001%
sulfur compounds (as SO42-): ≤0.003%
Ca: ≤0.03%
Fe: ≤5 ppm
K: ≤0.005%
Mg: ≤0.005%
heavy metals: ≤5 ppm (by ICP-OES)