磷酸氢二钠Di-SodiumhydrogenPhosphate(DSP)化学式：Na2HPO4.nH2O(n=0,12)别名：二钠分子量：358.0执行标准：HG/T2965-2000(工业级)HG/T2920-2000(食品级)性状：十二水物为白色结晶体，相对密度1.52，易风化，35℃熔融并失去5个结晶水，100℃时变成无水物，250℃时变成焦磷酸钠；无水物为白色粉末,易潮解;二者均易溶于水，水溶液呈弱碱性，不溶于醇。用途:十二水物用于锅炉软水剂，织物、木材和纸张的阻燃剂，生产洗涤剂，作釉药和焊药，在印染中作***漂白的稳定剂，味精、红***、青***、链***和污水生化处理制品等的培养剂，用于电镀等；在食品工业中用于制造焙粉，作品质改良剂，乳化剂，营养强化剂，发酵助剂，粘结剂；无水物用于作阻燃剂，丝的增重剂，活性染料的助剂，在焊接和铜焊中代替硼砂使用。包装：内塑外编，每袋净重25KG、50KG，贮于干燥通风处技术指标:序号指标名称无水物Na2HPO4十二水物Na2HPO4.12H2O工业级食品级工业级食品级1主含量%≥98.098.097.097.02P2O5%≥49.049.019.219.23PH（1%水溶液）8.5-10.08.5-10.08.8-9.28.8-9.24氯化物(以Cl计)%≤0.050.0145***盐%≤0.70.256氟化物（以F计）%≤0.0050.050.0057***（以Pb计）%≤0.0010.0018***（以As计）%≤0.00030.0050.00039水不溶物%≤0.100.100.050.05Di-SodiumhydrogenPhosphate(DSP)Molecularformula:Na2HPO4.nH2O(n=0,12)Molecularweight:358.0Standardexecuted:HG/T2965-2000(IndustrialGrade)HG2920-2000(FoodGrade)CASNumber:7758-79-4Properties:Whiteorcolorlesscrystallinefreeflowingsolid,efflorescentinair,easilysolubleinwater,butinsolubleinalcohol,itswatersolutionisslightlyalkaline,relativedensityat1.52g/cm3,meltingpointat35℃Uses:Usedasafire-preventioagentforfabric,timber,andpaper,alsoaswatersofteningagentforboiler,foodadditive,bufferingagent,solder,tanningagent,etc.Packingandstorage:In25kg,50kg,1000kgnetbags,storeatacool,dryandwellventilatedplace.GuaranteedTechnicalSpecificati***:No.Specificati***Na2HPO4(Anhydrous)Na2HPO4.12H2O(Duohydrate)IndustrialGradeFoodGradeIndustrialGradeFoodGrade1Maincontents%≥98.098.097.097.02Phosphoruspentoxide,asP2O549.049.019.219.23PHof1%watersolution8.5-10.08.5-10.08.8-9.28.8-9.24Chloride(asCl)max%0.050.0145Sulfate,asSO4%≤0.70.256He***ymetals,asPb%≤0.0010.0017Arsenic,asAs%≤0.00030.0050.00038Fluoride,asF%≤0.0050.050.0059Waterinsoluble%≤0.100.100.050.05)