无色至白色结晶或结晶性粉末，无臭。易溶于水，不溶于乙醇。水溶液呈酸性，2.7%的水溶液PH为4.2-4.7。于空气中稳定。ADI0-70mg/kg(FAO/WHO，1994）。
熔点  252.6 °C(lit.) 
密度  2.338 g/mL at 25 °C(lit.) 
溶解度  H2O: 1.5 M at 20 °C, clear, colorless

GB/T1274-93
项目ltem                                               分析纯     化学纯
                                                              (AR)       (CP)
含量(KH2PO4),%                               ≥99.5       99.0
pH(50g/L,25℃)pH of water solution      4.2～4.5   4.2～4.5
澄清度试验Clarity                             合格　　　 合格
水不溶物lnsoluble matter in water,%   ≤0.002      0.005
干燥失重Drying loss,%                 ≤0.2        0.3
氯化物(Cl)Chloride,%                  ≤0.001      0.005 
硫酸盐(SO4)Sulfale,%                  ≤0.003      0.005
总氮量(N)Total nitrogen,%             ≤0.001      0.002
砷(As)Arsenic,%                            ≤0.0005     0.002
钠(Na)Sodium,%                          ≤0.02       0.05
铁(Fe)Iron,%                                  ≤0.001      0.005
重金属(以Pb计)Heavy metals,%          ≤0.001      0.005


品级Grade                               色谱级，≥99.5% (T)   
                                       (for HPLC，≥99.5% (T)) 
外观appearance                           white powder  
纯度Purity (Titration by NaOH)           ≥99.5%  
pKa (25 °C)                             (1) 2.15, (2) 6.82, (3) 12.38 (phosphoric acid)  
水溶性solubility H2O:                    soluble0.1 g/mL at 25 °C, clear, colorless 
λ                                  10 % in H2O 
UV absorption λ: 210 nm A:               ≤0.1 
  λ: 220 nm A:                           ≤0.06 
  λ: 230 nm A:                           ≤0.04 
  λ: 300 nm A:                           ≤0.02 
  λ: 500 nm A:                           ≤0.02 
test for RP gradient                     corresponds to standard
filter test                              corresponds to standard
 
 

危险类别码             36/38 
    安全说明                 24/25 
    危险品运输编号     3260 
    海关编码                28352400 
WGK Germany      2
    RTECS                  TC6615500
    F                              8-10 

用途  用作肥料、调味剂、酿造酵母培养剂，用于制备缓冲溶液，也用于医药及制造偏磷酸钾。
用途  用于水稻、小麦、棉花、油菜、烟草、甘蔗、苹果等作物施肥
用途  作为饲料补磷添加剂。
用途  食品工业中用于制造烘焙物，作膨松剂，调味剂，发酵助剂，营养强化剂，酵母食料。也用作缓冲剂，螯合剂。
 
密封保存。