一、化学名：柠檬酸氢二铵，枸橼酸氢二铵
二、分子式：C6H14N2O7
三、分子量：226.192
四、CAS：3012-65-5
五、性能：无色细小结晶或白色颗粒。微溶于乙醇。溶液呈弱酸性，0.1mol/L水溶液的pH约为4.3。
六、用途：分析试剂，如作配合萃取剂、配合掩蔽剂、缓冲剂。
七、包装：内衬聚乙烯塑料袋，外套复合塑料编织袋包装，每袋净重25kg。
八、贮存与运输：本品存放于干燥、通风、洁净库房；装卸运输轻拿轻放，避免包装破损；严防雨淋、受潮、受热，需与有毒化学品隔离存放运输。
| 质量指标 | Specification | FCC 14 | HG/T3497-2000 | |
| 分析纯 | 化学纯 | |||
| 含量（以干基计），w/% ≥ | Content (On dry basis),w/% ≥ | 98.0-103.0 | 99.0 | 98.0 |
| 氯化物（以Cl计），w/% ≤ | Chloride (as Cl),w/% ≤ | 0.001 | 0.001 | 0.002 |
| 澄清度试验 | Clarity test | ——— | 合格 | 合格 |
| pH（50g/L溶液，25℃） | pH ( 50g/L Solution , 25℃ ) | 4.5-5.5 | ——— | ——— |
| 水不溶物，w/% ≤ | Water-insoluble matter,w/% ≤ | ——— | 0.005 | 0.01 |
| 灼烧残渣（以硫酸盐计），w/% ≤ | Ignition Residue (as SO4),w/% ≤ | ——— | 0.03 | 0.06 |
| 硫酸盐（SO4），w/% ≤ | Sulfate (SO4),w/% ≤ | 0.005 | 0.005 | 0.01 |
| 磷化合物（以PO4计），w/% ≤ | Phosphorus Compound(as PO4),w/%≤ | ——— | 0.002 | 0.005 |
| 重金属（以Pb计），w/% ≤ | Heavy metals (as Pb),w/% ≤ | ——— | 0.0005 | 0.001 |
| 草酸盐（C2O4），w/% ≤ | Oxalate(C2O4),w/% ≤ | ——— | 合格 | ——— |
| 钙（Ca），w/% ≤ | Calcium (Ca),w/% ≤ | ——— | 0.005 | 0.02 |
| 铁（Fe），w/% ≤ | Iron (Fe),w/% ≤ | 0.001 | 0.0005 | 0.002 |
| 铅（Pb），mg/kg ≤ | Lead (Pb),mg/kg ≤ | 2.0 | ——— | ——— |
1、Chemical Name: Ammonium Citrate Dibasic
2、Molecular Formula: C6H14N2O7
3、Molecular Weight: 226.192
4、CAS: 3012-65-5
5、Character: It is colorless fine crystals or white particles. Slightly soluble in ethanol. The solution is weakly acidic, and the pH of 0.1mol/L of water is about 4.3.
6、Usage: Analytical reagent, synergetic solvent extraction reagent, masking reagent, buffering reagent.
7、Packing: It is packed with polyethylene bag as inner layer, and a compound plastic woven bag as outer layer. The net weight of each bag is 25kg.
8、Storage & Transportation: It should be stored in a dry and ventilative warehouse, kept away from heat and moisture during transportation, unloaded with care so as to avoid damage. Furthermore, it must be stored separately from poisonous substances.
