等级
ACS reagent
puriss. p.a.
质量水平
检测方案
≥99.0% (T)
形式
powder (or crystals)
杂质
≤0.001% total nitrogen (N)
缺失
≤0.2% loss on drying, 105 °C
pH值（酸碱度）
8.7-9.3 (25 °C, 50 mg/mL in H2O)
pKa (25 °C)
(1) 2.15, (2) 6.82, (3) 12.38 (phosphoric acid)
痕量阴离子
chloride (Cl-): ≤10 mg/kg
sulfate (SO42-): ≤50 mg/kg
痕量阳离子
Ca: ≤10 mg/kg
Cd: ≤5 mg/kg
Co: ≤5 mg/kg
Cr: ≤5 mg/kg
Cu: ≤5 mg/kg
Fe: ≤5 mg/kg
K: ≤50 mg/kg
Mg: ≤5 mg/kg
Mn: ≤5 mg/kg
Ni: ≤5 mg/kg
Pb: ≤5 mg/kg
Zn: ≤5 mg/kg
heavy metals: ≤0.001% (by ICP-OES)
SMILES字符串
[Na+].[Na+].[H]OP([O-])([O-])=O
InChI
1S/2Na.H3O4P/c;;1-5(2,3)4/h;;(H3,1,2,3,4)/q2*+1;/p-2
InChI key
BNIILDVGGAEEIG-UHFFFAOYSA-L
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一般描述
磷酸二钠是磷酸的一种钠盐。它是一种高吸湿性和水溶性化合物，用作增塑剂、乳化剂和缓冲剂。它还可以用作软水器、清洁剂和锅炉处理过程中的试剂。
磷酸钠是分子生物学、生物化学和色谱研究中广泛使用的缓冲剂。它以三种形式存在：一元 (NaH 2 PO 4 )、二元 (Na 2 HPO 4 ) 和三元 (Na 3 PO 4 )。不同比例的一元和二元形式常用于配制中性磷酸钠缓冲溶液。
应用
磷酸二钠可用作：
- 一种高效、低成本的催化剂，在无溶剂条件下，通过芳香醛与丙二腈、α 或 β-萘酚的反应合成 2-氨基铬。
- 缓冲剂，以钯为催化剂，氧酮为氧化剂，以三甲基硅烯醚为原料合成环、无环烯酮和 α, β-不饱和醛。
- 高效催化剂，用醛、丙二腈和 4-羟基香豆素合成 3,4-二氢吡喃[3,2-c]铬。
- 与磷酸一起作为磷前体，通过阴离子表面活性剂 SDS（十二烷基硫酸钠）沉淀法合成羟基磷灰石。
WGK
WGK 1
闪点(°F)
Not applicable
闪点(°C)
Not applicable
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