Overview
Sodium polyphosphate is an inorganic polymer composed of sodium cations and polyphosphate anions. It exists in various chain lengths, with sodium hexametaphosphate (n≈6) being particularly significant commercially. First developed in the 19th century, this compound has become indispensable in multiple industries due to its unique chemical properties. The manufacturing process typically involves thermal dehydration of sodium orthophosphates. Industrial grades may contain mixtures of different chain lengths, optimized for specific applications. Food-grade versions undergo additional purification processes to meet strict safety standards.
Physical and Chemical Properties
As a polymeric compound, sodium polyphosphate exhibits variable molecular weights depending on the degree of polymerization. The material is hygroscopic, readily absorbing moisture from the air. In solution, it demonstrates excellent sequestering capabilities for metal ions, particularly calcium and magnesium. The pH of aqueous solutions typically ranges from 6.0 to 7.5 (1% solution). At high temperatures (above 300°C), the compound begins to decompose, forming sodium metaphosphate. Its ability to form soluble complexes with metal ions makes it particularly valuable in water treatment and cleaning applications.
Main Applications
In water treatment, sodium polyphosphate serves as both a corrosion inhibitor and scale preventer, particularly in cooling towers and boiler systems. The food industry utilizes food-grade versions (E452) as emulsifiers in processed meats and seafood products, where it improves water retention and texture. The detergent industry accounts for significant consumption, where it functions as a builder to enhance cleaning efficiency by sequestering hard water ions. Other applications include use in ceramic production, textile processing, and as a dispersing agent in paint formulations. The specific chain length determines optimal performance for each application.
Safety and Storage
While generally considered low in toxicity, sodium polyphosphate requires proper handling precautions. Dust inhalation should be avoided through proper ventilation or respiratory protection. Contact with eyes may cause irritation, necessitating safety goggles in powder handling situations. Storage should be in cool, dry conditions using moisture-resistant packaging. Bulk containers should be kept tightly sealed when not in use. Shelf life typically exceeds two years when stored properly. In case of spills, the material should be collected dry to prevent solution formation and subsequent surface contamination.
B2B Procurement Guide
Industrial buyers should specify the required polymerization range, as this significantly affects performance. Food-grade purchases require appropriate certifications (e.g., FCC, USP). Bulk shipments typically come in 25kg bags or 1-ton super sacks, with discounts available for full truckload quantities. Quality verification should include testing for active content, heavy metal contamination, and solubility characteristics. Reputable suppliers will provide batch analysis certificates. For water treatment applications, consider requesting performance test data specific to your water chemistry conditions.
Related Manufacturers
- 主营：化学试剂、日用化工品、医药中间体、混合磷酸钠、生化试剂、过渡金属、高端材料
- 主营：漆膜回、厚度2mm、流动仪、磷酸钠、测斜管、养护箱、分散机、测量仪、耐冲击、电极头、测定仪、弯折仪、测读仪、轴力计、抽提仪、半白纸、漆膜摆、筛析仪、点荷仪、硬度计、土壤蝶、测定土、沥青蜡、土工布、引伸仪、测试仪
- 主营：聚合氯化铝、聚丙烯酰胺、磷酸三钠、腌制混合盐、工业葡萄糖、离子交换树脂、硫酸亚铁、活性炭
- 主营：碳酸铝、硫化钙、硅铝凝胶粉、磷酸钠、工业磷酸镁、闪点提高剂、表面活性剂、耐火材料、水处理原材料
- 主营：甘氨酸、溴化物、戊酸鈉、磷酸钠、蒽甲酸、联吡啶、紫苏葶、锂电池、牛磺酸、褪黑素、磷酸铟、新癸酸、赖氨酸、溴化鏻、乙氧基、藏花醛、豆甾醇、羟乙基、维素酶、庚二酸、呋虫胺、丹参素、萘甲醛、槐豆胶、黄柏酮、元明粉
- 主营：化学试剂、高纯试剂、色谱试剂、六偏磷酸钠、基准试剂、标准溶液、生化试剂、优级纯试剂、光谱纯试剂、三羟甲基氨基甲烷、碳酸钡、无水碳酸钠、碳分子筛、分析纯试剂、生物染色剂、NKC-9树脂、NKA-II树脂、乙酸铝、乙酸钾、无水碳酸钾、无水硫酸镁、磷酸三钠
- 主营：单磷酸、白果酸、银杏酸、二磷酸钠盐、澳洲茄胺、红四氮唑、白当归脑、曲氟胸苷、安石榴苷、二磷酸葡、白术内酯、四氮唑蓝、澳洲茄碱、巴卡亭iii、白藜芦醇、脱氧尿苷、澳洲茄边、白当归素、脱氧腺苷、腺苷一水合、白花前胡丙、羟甲香豆素、尿苷三磷酸、菝葜皂苷元、磷酸二钠盐
- 主营：中药对照品、药物杂质标准品、中药农产空白基质、磷酸钠、分析标准品、药典标准溶液、标准物质、标准品、对照品
- 主营：阻燃剂、抗氧剂、氰酸酯树脂、磷酸钠、骨水泥、硅酸三钙、铝酸三钙、光固化剂
- 主营：叔丁酯、银杏叶、灭菌磷、磷酸钠、檀香醇、磺酰基、庚烯酮、分散蓝、异丁酯、乙霉威、霜霉威、3681-82-1、水中氟、子烯酮、野菊花、西洋参、氟苯基、芫根苷、甲氨基、唑螨酯、洋艾素、denhardts、水中钙、独活素、苯基芴、水中钡
- 主营：立式螺旋混合机、喷雾干燥机、化工烘干设备
- 主营：药品检测标准品、药物杂质标准品、对照品、磷酸钠、中药对照药材、中药农残空白基质、分析标准品、仪器检测校准品、金属离子标准溶液、滴定溶液、食品检测标准物质、有机检测标准溶液、指示液、缓冲液、电导率溶液、PH标准溶液、熔点标准品、国家标准物质、比色液
- 主营：Mvr蒸发器、多效蒸发器、蒸发结晶器、磷酸钠、冷却结晶器、蒸发浓缩系统、化工废水处理蒸发器、母液干化系统
- 主营：增塑剂、二甲基亚砜、顺酐、磷酸钠、环丁砜、二甲基二硫醚、赋臭剂、四氢噻吩加臭剂、环戊烷、塑化剂、二辛酯、石油醚、异丁醇、氯化苄、叔十二硫醇、硬脂酸钙、树脂涂料、四氢噻吩、化学试剂、国标染料、氯乙酸、硬脂酸锌、乙二醛、异辛烷、橡胶塑料
- 主营：增塑洗涤剂、间二甲苯、乳化剂、磷酸钠、防冻液、丙二醇、三甲苯、苯乙烯、溶剂油、钛酸四丁酯、甲醇、乙醇、仲辛醇、异丙醇、85磷酸、碳酸丙烯酯、甲基丙烯酸、丙烯酸羟乙酯、二甲苯、脂肪酸甲酯、甲酸、氨水、丙烯酸、草酸、聚乙二醇
- 主营：脱霉剂、干燥剂、氯化镁、常州无水焦磷酸钠代理、漂白剂、苹果酸、活性炭、甲酸钠、硫酸钾、碳酸锶、氢氧化铝、防火涂料、泥凝固剂、碳酸氢钠、一水柠檬酸、超细凹凸棒、一水硫酸锌、猫砂用原料、营养强化剂、磷酸二氢铵、酸度调节剂、无水白色铝粉、土壤作物改良剂
- 主营：甜菊糖、甘氨酸、水苏糖、磷酸钠、海藻糖、甘露醇、精氨酸、酪蛋白、烟酰胺、牛磺酸、褪黑素、螺旋藻、维生素B1、维生素B2、维生素B6、一水肌酸、苯丙氨酸、酪蛋白酸钠、海藻酸钠、赤藓糖醇、木糖醇、聚丙烯酸钠、山梨酸钾、大豆肽、苏氨酸、黄原胶
- 主营：轻质碳酸钠、速溶硅酸钠、五水偏硅酸钠、磷酸钠、过硫酸氢钾、十二烷基苯磺酸钠、氧化钙、大苏打、离子钙
- 主营：磷酸钠、抛光剂、磷酸氢、锅炉除垢剂
- 主营：聚丙烯酰胺、重金属捕捉剂、钢厂水处理药剂、磷酸钠、聚合氯化铝铁、碱式聚合氯化铝、硫酸铝钾、硫酸铝铵、除臭剂植物型、除臭剂化学型、非离子聚丙烯酰胺、液体硫酸铝、固体硫酸铝、氨氮去除剂、COD去除剂、液体聚合氯化铝、工业级聚合氯化铝、阳离子聚丙烯酰胺、阴离子聚丙烯酰胺、磷酸二氢钾、阻垢剂、尿素、硫化钠
- 主营：防腐剂、甲酸钙、消泡剂、磷酸钠、涂料乳液、多功能助剂、工业级卡松、二甲基酮肟、工业硫酸铜、原料水杨酸钠、水性涂料助剂、工业级粘合剂、建筑水泥早强剂、工业级三乙醇胺、柠檬酸、苹果酸、硫醇甲基锡(有机锡)、松香、松香甘油酯、苯甲酸钠、苯甲酸、酒石酸
- 主营：食品添加剂、工业印染助剂保险粉、雕白块吊白粉、磷酸钠、五氧化二钒、工业及食品及片碱粒碱、电镀原料、污水处理剂、消毒剂、洗涤原料、英轩柠檬酸系列、葡萄糖、重金属捕捉剂、石油助剂、水溶农用肥料、表面活性剂、过碳酸钠、电镀催化剂
- 主营：稀释剂、虫胶片、脱漆剂、磷酸钠、蒙脱石、脱霉剂、漂白剂、石灰氮、粘合剂、除锈剂、清洗剂、活性染料、二氯丙烷、二氯甲烷、土壤杀菌、氟硅酸钠、环保溶剂、酚醛树脂、硝酸铁、氯化钡、硫酸氢钠、甲酸、三氯化铝、二氯乙烷、二氯异氰尿酸钠、固体次氯酸钠
- 主营：色谱试剂、环保试剂、卡尔费休试剂、磷酸钠、无水试剂
- 主营：离子液体、5-二甲基吡唑、咪唑、六氟磷酸钠、催化剂、阻燃剂、正丁醇锆、四氟硼酸锂、香兰基丁醚、氟化物、全氟辛基三甲氧基硅烷、丙酮肟、双酚E型氰酸酯、叔丁基乙烯基醚、钯碳催化剂、钛硅分子筛、硫酸烟酰苯胺、丙酮缩氨基硫脲
- 主营：全氟三丁胺、二苄叉山梨醇、六氟丙烯二聚体、磷酸钠、六氟环氧丙烷二聚体、异丙醇铝、纳米勃姆石、二异戊基硫醚、隐色结晶紫、邻菲罗啉
- 主营：防冻液、冰醋酸、乙二醇、磷酸钠、冰乙酸、纯吡啶、丙二醇、羟基苯、14丁二醇、3-丙三醇、四氢呋喃、环保乙腈、化工苯酚、1.4丁二醇、医用苯酚、工业苯酚、精制苯酚、价位四氢、乙腈工业、乙酸乙酯、吡啶化工、甲酸乙酯、吡啶工业、求购苯酚、高纯三氯、实验乙腈