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。密度为1.48g/ml，熔点185 ºc，沸点100ºc,溶于水，微溶于乙醇。
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：本品应贮存在干燥通风清洁的库房中，装载运输时要轻装轻放，防止包装破损，防止受潮、受热，运输过程中防止雨淋受潮，应与有毒物品隔离。
| 质量指标 | specification | fcc vii | hg/t3497-2000 | |
| 分析纯 | 化学纯 | |||
| 含量（以干基计），w/% ≥ | content (on dry basis),w/% ≥ | 98.0 | 99.0 | 98.0 |
| 氯化物（以cl计），mg/kg ≤ | chloride (cl),mg/kg ≤ | 10 | 10 | 20 |
| 铁（fe），mg/kg ≤ | iron (fe),mg/kg ≤ | 10 | 5 | 10 |
| 铅（pb），mg/kg ≤ | lead (pb),mg/kg ≤ | 2 | ——— | ——— |
| ph（50g/l溶液，25℃） | ph (50g/l solution,25℃) | 4.5-5.5 | ——— | ——— |
| 水不溶物，w/% ≤ | water insoluble,w/% ≤ | ——— | 0.005 | 0.01 |
| 灼烧残渣（以硫酸盐计），w/% ≤ | ignition residue (as so4),w/% ≤ | ——— | 0.03 | 0.06 |
| 硫化合物（以so4计），w/% ≤ | sulfur compound(as 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 |
| 草酸盐（c2o4），w/% ≤ | oxalate(c2o4),w/% ≤ | ——— | 合格 | |
| 钙（ca），w/% ≤ | calcium (ca),w/% ≤ | ——— | 0.005 | 0.02 |
| 澄清度试验 | clarity test | ——— | 合格 | 合格 |
1、 chemical name: ammonium citrate dibasic
2、molecular formula: c6h14n2o7
3、molecular weight: 226.192
4、cas: 3012-65-5
5、character: colorless fine crystalline or white particles. density 1.48g/ml. melting point185 °c, boiling point100 °c. soluble in water and soluble in alcohol slightiy.
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.
