等级
ACS reagent
质量水平
蒸汽密度
4.9 (vs air)
检测方案
98.0-102.0%
形式
powder
杂质
≤0.005% Insoluble matter
pH值（酸碱度）
8.7-9.3 (25 °C, 5% in solution)
密度
1.68 g/mL at 25 °C (lit.)
痕量阴离子
chloride (Cl-): ≤0.001%
sulfate (SO42-): ≤0.005%
痕量阳离子
Fe: ≤0.001%
heavy metals: ≤0.001% (by ICP)
SMILES字符串
O.O.O.O.O.O.O.[Na+].[Na+].OP([O-])([O-])=O
InChI
1S/2Na.H3O4P.7H2O/c;;1-5(2,3)4;;;;;;;/h;;(H3,1,2,3,4);7*1H2/q2*+1;;;;;;;;/p-2
InChI key
PYLIXCKOHOHGKQ-UHFFFAOYSA-L
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一般描述
七水合磷酸二钠是磷酸二钠（DSP）或正磷酸氢二钠的水合形式。DSP 被广泛用作 pH 调节剂和生理盐水泻药。
应用
七水二磷酸钠、磷酸一碱钾和 NaCl 在去离子水中的混合物用于制备磷酸盐缓冲盐水（PBS，pH值7.4）。PBS 在生物学研究中用作缓冲溶液，以保持 pH 恒定。
WGK
WGK 1
闪点(°F)
Not applicable
闪点(°C)
Not applicable
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