【性狀】 無色透明結晶或白色顆粒。在乾燥空氣中風化,相對密度1.45,熔點58℃。溶於水,水溶液呈鹼性;微溶於乙醇。
基本介紹
- 中文名:結晶醋酸鈉
- 分子式:CH3COONa·3H2O
- 分子量:136.08
- 性狀: 無色透明結晶或白色顆粒。
規格 指標名稱 | AR | CP | 醫藥級 | 食品級 | 工業高純 |
含量(CH3COONa·3H2O) /% | ≥99.0 | ≥99.0 | 58~60 (CH3COONa) | 58~60 (CH3COONa) | 58~60 (CH3COONa) |
PH值(50g/L,25℃) | 7.5~9.0 | 7.5~9.0 | 7.5~9.0 | 7.5~9.0 | 7.5~9.0 |
澄清度試驗 | 合格 | 合格 | - | - | - |
水不溶物/% | ≤0.002 | ≤0.005 | ≤0.005 | 0.01 | ≤0.03 |
氯化物(Cl) /% | ≤0.001 | ≤0.003 | - | - | ≤0.04 |
硫酸鹽(SO4) /% | ≤0.005 | ≤0.005 | - | - | - |
磷酸鹽(PO4) /% | ≤0.000 2 | ≤0.000 5 | - | - | - |
鋁(Al) /% | ≤0.000 5 | ≤0.001 | ≤0.000 5 | - | - |
鈣(Ca) /% | ≤0.002 | ≤0.005 | - | - | - |
鐵(Fe) /% | ≤0.000 2 | ≤0.000 5 | ≤0.000 5 | - | ≤0.002 |
銅(Cu) /% | ≤0.000 5 | ≤0.001 | - | - | - |
鉛(Pb) /% | ≤0.000 5 | ≤0.001 | - | - | - |
還原高錳酸鉀物質 (以HCOOH計) /% | ≤0.01 | ≤0.02 | - | - | - |
砷(As) /% | - | - | ≤0.000 2 | ≤0.000 1 | - |
重金屬(以Pb計) /% | - | - | ≤0.001 | ≤0.000 5 | - |