用作洗滌品助劑，亦可用于石油、冶金、采礦、造紙、水處理等。主要用作合成洗滌劑的助劑，用于肥皂增效劑和防止條皂油脂析出和起霜。對潤滑油和脂肪有強烈的乳化作用，可用于調節(jié)緩沖皂液的PH值。工業(yè)用水的軟水劑。制革---劑。染色助劑。油漆、高嶺土、氧化鎂、碳酸鈣等工業(yè)中配制懸浮時作分散劑。鉆井泥漿分散劑。造紙工業(yè)用作防油污劑。食品工業(yè)中用于罐頭，果汁飲料，奶制品，豆乳等的品質改良劑，水分保持劑。主要供火腿罐頭嫩化，蠶豆罐頭中使豆皮軟化，亦可用作軟化劑和增稠劑。STPP還存在其不可避免的環(huán)境危害，由于本身含磷，容易造成水體富營養(yǎng)化。由于國家的限磷政策的出臺，三聚磷酸鈉在洗滌劑助劑方面的應用逐漸減少，逐步被層狀硅酸鈉、分子篩等產(chǎn)品代替。

　　Used as a washing agent, can also be used in petroleum, metallurgy, mining, paper, water treatment. It is mainly used as an auxiliary agent for synthetic detergents, as a synergistic agent for soap and to prevent the grease from precipitation and frosting. It has strong emulsifying effect on lubricating oil and fat, and can be used to adjust the PH value of buffer soap. A water softener for industrial use. Tanning -- agent. Dyeing AIDS. Paint, kaolin, magnesium oxide, calcium carbonate and other industrial preparation of suspension dispersant. Drilling mud dispersant. The papermaking industry is used as an oil repellent. In the food industry used for canned, fruit juice drinks, dairy products, soy milk quality improver, water retention agent. It is mainly used for tenderizing ham and softening bean skins in canned broad beans, and it can also be used as a softener and thickener. STPP also has its inevitable environmental harm, because it contains phosphorus, it is easy to cause water eutrophication. Due to the introduction of the national phosphorus limit policy, the application of sodium tripolyphosphate in detergent additives is gradually reduced, and gradually replaced by layered sodium silicate, molecular sieves and other products.

　　食品行業(yè)的用途：水分保持劑、品質改良劑、pH調節(jié)劑、金屬螯合劑。我國《食品添加劑使用衛(wèi)生標準》(GB2760-2011)規(guī)定：罐頭、果汁(果味型)飲料、植物蛋白飲料，最大使用量為1.0g/kg；乳制品、禽肉制品、肉制品、冰淇淋、方便面，最大使用量為5.0g/kg。復合磷酸鹽使用時，以磷酸鹽計，罐頭肉制品不得超過1.0g/kg；煉乳不得超過0.50g/kg；本品與焦磷酸鈉、磷酸鈉復合使用時，以磷酸鹽計不得超過5g/kg；西式蒸煮，煙熏火腿按GB13101-1991《西式蒸煮，煙熏火腿衛(wèi)生標準》執(zhí)行，復合使用時不得超過5g/kg(西式火腿可適當多加，以磷酸鹽計為8g/kg。其他使用參考：用于火腿罐頭，在適當條件下有利于產(chǎn)品質量的提高，如成品形態(tài)完整、色澤好、肉質柔嫩、容易切片、切面有光澤。三聚磷酸鈉用于火腿原料肉的腌制，每l00kg肉加3號混合鹽(精鹽91.65%、砂糖8%、亞硝酸鈉0.35%)2.2kg、三聚磷酸鈉85g，充分攪拌均勻，在0~4℃冷庫中腌制48~72h，效果良好。用于蠶豆罐頭生產(chǎn)，可使豆皮軟化。許多果蔬有堅韌的外皮，隨著果蔬的成熟，外皮愈加堅韌。在果蔬加工熱燙或浸泡用水中，加入聚磷酸鹽，可絡合鈣，從而降低外皮的堅韌度。

　　Food industry USES: water retention agent, quality improver, pH regulator, metal chelating agent. China's "hygienic standards for the use of food additives" (gb2760-2011) provisions: canned, fruit juice (fruit-flavored) drinks, vegetable protein drinks, the maximum use of 1.0g/kg; Dairy products, poultry products, meat products, ice cream, instant noodles, the maximum use of 5.0g/kg. When using complex phosphates, canned meat products shall not exceed 1.0g/kg in terms of phosphates; Condensed milk shall not exceed 0.50g/kg; When used in combination with sodium pyrophosphate and sodium phosphate, the amount of phosphate shall not exceed 5g/kg. Western cooking, smoked ham according to gb13101-1991 "western cooking, smoked ham hygiene standards" implementation, composite use should not exceed 5g/kg(western ham can be appropriately added, in phosphate is 8g/kg. Other references: used for canned ham, under the appropriate conditions to improve the quality of products, such as finished form integrity, good color, tender meat, easy to slice, cut surface luster. Sodium tripolyphosphate is used for curing ham raw meat. For each l00kg of meat, add no.3 mixed salt (refined salt 91.65%, granulated sugar 8%, sodium nitrite 0.35%). Used in the production of canned broad beans to soften the skin. Many fruits and vegetables have tough skins that get tougher as they mature. In the hot processing of fruits and vegetables or soaking water, add polyphosphate, can complexate calcium, thereby reducing the hardness of the skin