一、化學(xué)名：檸檬酸氫二銨，枸櫞酸氫二銨
二、分子式：C6H14N2O7
三、分子量：226.192
四、CAS：3012-65-5
五、性能：無色細(xì)小結(jié)晶或白色顆粒。密度為1.48g/mL，熔點(diǎn)185 oC，沸點(diǎn)100oC,溶于水，微溶于乙醇。
六、用途：分析試劑，如作配合萃取劑、配合掩蔽劑、緩沖劑。
七、包裝：內(nèi)襯聚乙烯塑料袋，外套復(fù)合塑料編織袋包裝，每袋凈重25kg。
八、貯存與運(yùn)輸：本品應(yīng)貯存在干燥通風(fēng)清潔的庫(kù)房中，裝載運(yùn)輸時(shí)要輕裝輕放，防止包裝破損，防止受潮、受熱，運(yùn)輸過程中防止雨淋受潮，應(yīng)與有毒物品隔離。
| 質(zhì)量指標(biāo) | Specification | FCC VII | HG/T3497-2000 | |
| 分析純 | 化學(xué)純 | |||
| 含量（以干基計(jì)），w/%????????≥ | Content (On dry basis),w/%????≥ | 98.0 | 99.0 | 98.0 |
| 氯化物（以Cl計(jì)），mg/kg ?????≤ | Chloride (Cl),mg/kg ?????????≤ | 10 | 10 | 20 |
| 鐵（Fe），mg/kg??????????????≤ | Iron (Fe),mg/kg??????????????≤ | 10 | 5 | 10 |
| 鉛（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 |
| 灼燒殘?jiān)ㄒ粤蛩猁}計(jì)），w/%??≤ | Ignition Residue (as SO4),w/%??≤ | ——— | 0.03 | 0.06 |
| 硫化合物（以SO4計(jì)），w/%????≤ | Sulfur compound(as SO4),w/%?????≤ | 0.005 | 0.005 | 0.01 |
| 磷化合物（以PO4計(jì)），w/%????≤ | Phosphorus compound(as PO4),w/%≤ | ——— | 0.002 | 0.005 |
| 草酸鹽（C2O4），w/%??????????≤ | Oxalate(C2O4),w/%???????????≤ | ——— | 合格 | |
| 鈣（Ca），w/%???????????????≤ | Calcium (Ca),w/%????????????≤ | ——— | 0.005 | 0.02 |
| 澄清度試驗(yàn) | 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.
