一、亞磷酸氫鈉結構？

亞磷酸氫鈉的結構：

亞磷酸氫鈉（Sodium orthophosphite）用于分析試劑。

中文名：亞磷酸氫鈉

外文名：Sodium orthophosphite

化學式：NaH2PO3·5H2O（NaH2PO3）

分子量：193

性質：白色結晶性粉末，低溫下穩定存在，200度以上轉化為其他磷酸鹽。易吸濕，易溶于水。

英文名：Sodium orthophosphite

化學式：NaH2PO3·5H2O（NaH2PO3）

分子量：193

性質：白色結晶性粉末，低溫下穩定存在，200度以上轉化為其他磷酸鹽。易吸濕，易溶于水。

用途：分析試劑。

貯存：密封干燥保存。

亞磷酸氫鈉分子式是NaH?PO?，亞磷酸鈉為Na?HPO?。亞磷酸氫鈉和亞磷酸鈉的結構式如圖所示:

亞磷酸氫鈉(NaH2PO3)是由Na+和H2PO3－構成的離子化合物，屬于酸式鹽。亞磷酸鈉是由Na+離子和HPO3－離子通過離子鍵構成的離子化合物屬于正鹽。

二、次亞磷酸鈉的基本信息

中文名稱:次亞磷酸鈉

中文別名:次磷酸鈉;次磷酸二氫鈉;SHP

產品英文名 Sodium hypophosphite

英文別名 Chemicalna-47; hypophosphorousacidmonosodiumsalt;

monosodiumhypophosphite; natriumhypophosphit; Phosphinicacid,sodiumsalt;

phosphinicacidmonosodiumsalt; sodiumhydrogenphosphite(nah2po2); sodiumhydrophosphite; sodiummonophosphate; sodiumphosphinate;

sodiumphosphinate(nah2po2); sodium dihydric hypophosphite;

sodium dihydrogen hypophosphite;

SODIUM HYPOPHOSPHITE EXTRA PURE, B. P. C . 1963; SodiumHypophosphiteGr; HYPOPHOSPHOROUSACID,SODIUMSALT; SODIUM HYPOPHOSPHITE MONOHYDRATE , WATER CA 12-17%; sodium hypophosphite EN grade

安全術語

S17 Keep away from combustible material.

遠離可燃性物質。

三、亞磷酸鹽溶液容易氧化嗎

亞磷酸鹽在硝酸根溶液中的光氧化過程及影響因素

邱慧敏;耿金菊;韓超;任洪強

【摘 要】亞磷酸鹽(HPO32?,H2PO3?,+3價)是磷生物地球化學循環中的還原態形式,其在水環境中的光氧化過程可能是亞磷酸鹽轉化的重要途徑之一.以300W汞燈為光源,研究了環境濃度(1μmol/L)的亞磷酸鹽在NO3?溶液中的光氧化過程,探討了NO3?濃度、溶液pH值、環境中普遍存在的離子(Cl?、SO42?、HCO3?、Fe3+、Mn2+)及腐殖酸對亞磷酸鹽光氧化過程的影響.結果表明,亞磷酸鹽在NO3?溶液中的光氧化反應符合準一級動力學規律,當NO3?濃度由0增至120μmol/L時,其速率常數由0.020h?1增至0.271h?1;酸性溶液(pH=4)有利于亞磷酸鹽在硝酸根溶液中的光氧化,水環境中SO42?及Cl?對光氧化過程存在弱抑制,而HCO3?對光氧化過程產生較強的抑制作用.Fe3+促進了亞磷酸鹽在NO3?溶液中光氧化過程,而Mn2+則是抑制作用.腐殖酸的加入對亞磷酸鹽光氧化過程存在抑制作用.活性氧猝滅劑(異丙醇,疊氮化鈉)的加入大大抑制了亞磷酸鹽的光氧化過程,表明亞磷酸鹽光氧化過程中,活性氧的產生對其光氧化起到關鍵作用.模擬太湖水樣中亞磷酸鹽的減少量與正磷酸鹽的增加量一致,證明亞磷酸鹽光氧化產物是正磷酸鹽.%Phosphite (HPO32?, H2PO3?, +3valence) is a reduced form of phosphorus in the biogeochemical phosphorus cycle. Its photooxidation process can be an important path of its transformation in water environment. The photooxidation process of 1μmol/Lphosphite in nitrate solution was studied using 300W mercury lamp as light source. Experiments were carried out to study the influences of NO3? concentration, pH value and common ions in water (such as Cl?, SO42?, HCO3?, Fe3+, Mn2+) and humic acid, on the photooxidation of phosphite in NO3? solutions. The results demonstrate that the photooxidation of phosphite followed the pseudo-first-order kinetics and the photooxidation rate increased rapidly with increasing initial NO3? concentration. The kinetics constant changed from 0.020h?1 to 0.271h?1 with the concentration of NO3? increased from 0 to 120μmol/L. The kinetics constant decreased with the increase of pH and the addition of HCO3?. The addition of Cl? and SO42? slightly inhibited the photooxidation process. The addition of Fe3+ accelerated the photooxidation of phosphite in NO3? solution while Mn2+ inhibited the photooxidation. The addition of humic acid inhibited the photooxidation process. ROS (reactive oxygen species) were found to play an important role in the phosphite photooxidation reaction by using isopropanol and sodium azide (NaN3) as ROS quenchers. In the simulated Taihu Lake water experiment, the increased amount of phosphate coincided with the decreased amount of phosphite, which indicated that the photooxidation product of phosphite is phosphate.

10天。亞磷酸（Phosphorousacid）是一種無機化合物，其化學式為H3PO3，分子量為82.00，在空氣中會緩慢氧化成正磷酸，氧化速度為10天以上。

標簽：鹽溶液亞磷酸氧化