双乙酸钠 | |
---|---|
别名 | 双醋酸氢钠;SDA;二醋酸一钠;双醋酸钠 |
识别 | |
CAS号 | 126-96-5 |
ChemSpider | 29100 |
SMILES |
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性质 | |
化学式 | C4H7NaO4 |
摩尔质量 | 142.09 g·mol−1 |
若非注明,所有数据均出自一般条件(25 ℃,100 kPa)下。 |
双乙酸钠是一种化学式为NaH(C2H3O2)2的化合物,通常用做调味剂以及抗微生物剂。
制备及结构
双乙酸钠可以将乙酸钠进行半中和,再将溶液蒸发而得。可以视为是一种在浓缩乙酸溶液中增强酸性的同型缔合的结果:
- 2 CH3CO2H + NaOH → Na+[(CH3CO2)2H]- + H2O
双乙酸钠可以描述成是有氢键的阴离子H(CH3CO2)2-的钠盐。O---O的距离约2.47 Å.[1]
应用
双乙酸钠也是一种食品添加剂[2],其E编码为E262,可以提供咸味及醋的口味。
参考资料
- ↑ Barrow, Michael J.; Currie, Murdoch; Muir, Kenneth W.; Speakman, J. Clare; White, David N, J. "Crystal structures of some acid salts of monobasic acids. XVII. Structure of sodium hydrogen diacetate, redetermined by neutron diffraction" Journal of the Chemical Society, Perkin Transactions 2: Physical Organic Chemistry 1975, pp. 15-18. doi:10.1039/P29750000015
- ↑ Peter J. Taormina "Implications of Salt and Sodium Reduction on Microbial Food Safety" in Critical Reviews in Food Science and Nutrition, 2010, vol. 50, 209-227. doi:10.1080/10408391003626207
乙酸盐及乙酸衍生物 | |||||||||||||||||||||||||||||||||||||||||||||||||
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AcH AcOH |
He | ||||||||||||||||||||||||||||||||||||||||||||||||
LiOAc | Be(OAc)2 Be4O(OAc)6 |
B(OAc)3 | ROAc | NH4AcO | AcOAc | FAc | Ne | ||||||||||||||||||||||||||||||||||||||||||
NaOAc NaH(OAc)2 |
Mg(OAc)2 | Al(OH)2(OAc) Al(OH)(OAc)2 Al(OAc)3 Al(OAc)x |
Si | P | S | ClAc ClOAc |
Ar | ||||||||||||||||||||||||||||||||||||||||||
KOAc | Ca(OAc)2 | Sc(OAc)3 | Ti(OAc)4 | VO2(OAc)2 | Cr2(OAc)4 Cr(OAc)3 |
Mn(OAc)2 Mn(OAc)3 |
Fe(OAc)2 Fe(OAc)3 |
Co(OAc)2 Co(OAc)3 |
Ni(OAc)2 | Cu2(OAc)2 Cu2(OAc)4 |
Zn(OAc)2 | Ga(OAc)3 | Ge | As | Se | BrAc BrOAc |
Kr | ||||||||||||||||||||||||||||||||
RbOAc | Sr(OAc)2 | Y(OAc)3 | Zr(OAc)4 | Nb | Mo(OAc)2 | Tc | Ru(OAc)3 | Rh2(OAc)4 | Pd(OAc)2 | AgOAc | Cd(OAc)2 | In(OAc)3 | Sn(OAc)2 Sn(OAc)4 |
Sb(OAc)3 | Te | IAc IOAc I(OAc)3 |
Xe | ||||||||||||||||||||||||||||||||
CsOAc | Ba(OAc)2 | Hf(OAc)4 | Ta | W | Re | Os | Ir | Pt(OAc)2 | Au(OAc)3 | Hg2(OAc)2, Hg(OAc)2 |
TlOAc Tl(OAc)3 |
Pb(OAc)2 Pb(OAc)4 |
Bi(OAc)3 | Po | At | Rn | |||||||||||||||||||||||||||||||||
Fr | Ra | Rf | Db | Sg | Bh | Hs | Mt | Ds | Rg | Cn | Nh | Fl | Mc | Lv | Ts | Og | |||||||||||||||||||||||||||||||||
↓ | |||||||||||||||||||||||||||||||||||||||||||||||||
La(OAc)3 | Ce(OAc)3 Ce(OAc)4 |
Pr(OAc)3 | Nd(OAc)3 | PmAc3 | Sm(OAc)3 | Eu(OAc)3 | Gd(OAc)3 | Tb(OAc)3 | Dy(OAc)3 | Ho(OAc)3 | Er(OAc)3 | Tm(OAc)3 | Yb(OAc)3 | Lu(OAc)3 | |||||||||||||||||||||||||||||||||||
Ac(OAc)3 | Th(OAc)4 | Pa | U(OAc)4 UO2(OAc)2 |
Np | PuO2Ac2 | Am | Cm | Bk | Cf | Es | Fm | Md | No | Lr |