10101-89-0 Usage
Description
Sodium phosphate tribasic dodecahydrate, also known as trisodium phosphate or TSP, is a colorless or white crystalline hydrated trisodium salt of phosphoric acid. It is highly soluble in water, with an aqueous solution that is strongly alkaline. This reagent is insoluble in ethanol and carbon disulfide, and has a pH of around 12, making it sufficiently alkaline for saponification of grease and oils.
Uses
Used in Water Treatment:
Sodium phosphate tribasic dodecahydrate is used as a water softener, boiler cleaning agent, and metal rust inhibitor. It is also used for water softening in various industries, including paper dyeing, textile printing, and power generation.
Used in Chemical, Textile Printing, and Paper Industries:
Sodium phosphate tribasic dodecahydrate is used as a detergent, boiler scale inhibitor, and pH buffer. It serves as a fixing agent for textile printing, a mercerized enhancer for fabric, and a tendering resistant agent for making thread.
Used in Food Processing:
Sodium phosphate tribasic dodecahydrate is used as an emulsifier, nutritional supplement, and quality improver in food processing. It helps retain water in meat, improve adhesive force, and reduce nutrient loss, making the meat soft.
Used in Enamel Industry:
Sodium phosphate tribasic dodecahydrate is used as a fluxing agent and bleaching agent in the enamel industry.
Used in Leather Industry:
Sodium phosphate tribasic dodecahydrate is used as a degreasing agent and rawhide unglued agent in the leather industry.
Used in Photography:
Sodium phosphate tribasic dodecahydrate is used as a favorable promoter for photographic developing solutions.
Used in Detergents and Tooth Cleaners:
Sodium phosphate tribasic dodecahydrate is used in tooth cleaners and detergents for bottles.
Used in Rubber Industry:
Sodium phosphate tribasic dodecahydrate is used as a coagulating agent for rubber latex.
Used in Juice Purification:
Sodium phosphate tribasic dodecahydrate is used as a juice purification agent.
Used in Pharmaceutical Applications:
Sodium phosphate tribasic dodecahydrate is used in the isolation of mycobacteria, including culturing of tubercle bacilli, and has been used as a protein precipitant in certain applications.
Used in Cleaning Products:
Due to its versatility and low manufacturing price, TSP is the basis for a plethora of cleaning products, making it an excellent agent for cleaning everything from laundry to concrete driveways.
Used in Buffer Formulation:
Sodium phosphate tribasic dodecahydrate is often used in the formulation of various buffers.
Production method
(1) Neutralization method: Diluting the food-grade phosphoric acid with deionized water to a certain concentration solution, then add the mixed liquor to a stirred reactor, add the food grade caustic soda solution to the reactor slowly to neutralize the reaction. Adjust the ratio of Na/P to 3.24~3.26. Purifying the solution with bleaching agent, removing heavy metal agent and removing arsenic agent, and then remove the impurities by filtration. After the cooling crystallization, centrifugal separation and drying of the filter liquor, the final product-trisodium phosphate 12-hydrate can be obtained. The reaction is
H3PO4+3NaOH→Na3PO4+3H2O
(2) WPA method: add some wash water to the phosphoric which can be obtained by the reaction of the phosphate rock with sulfuric acid and dilute the solution which the content of the pentoxied is 18%~20% . The mixed liquor was heated to 85 ℃, adding 30 to 35. B6 sodium carbonate solution slowly at the condition of stirring and make the pH of it at the range of 8~8.4. Then, adding mother liquid of trisodium phosphate to the reactor and make the content of phosphorus pentoxide in the solution is less than 12%. After Insulated for 15~20min, the solution is filtered, concentrated and evaporated to 24~25 ° Bé. Adding the liquid caustic soda to make sodium reserve ratio to 3.24~3.26. The refined phosphate 12-hydrate can be obtained after the cooling crystallization, centrifugal separation and drying of the solution. The reaction is
Ca5F (PO4) 3 + 5H2SO4 + 10H2O → 3H3PO4 + 5CaSO4? 2H2O + HF
H3PO4 + Na2CO3 → Na2HPO4 + H2O + CO2 ↑
Na2HPO4 + NaOH →-Na3PO4 + H2O
Thermal phosphoric acid method: Adding the phosphoric acid into the reactor and neutralize the liquid caustic soda which is slowly added into the reactor under the condition of the stirring can get the trisodium phosphate. The refined phosphate 12-hydrate can be obtained after the cooling crystallization, centrifugal separation and drying of the solution. The reaction is
H3PO4+3NaOH→Na3PO4+3H2O
Identification method
The reaction of aqueous solution of trisodium phosphate (1 + 20) should include sodium salt reaction and phosphate reaction.
1. Sodium salt reaction: refer to the identification methods of sodium hydroxide.
2. Phosphate Reaction: refer to the identification methods of monocalcium phosphate.
Usage of food additives
Quality improver, emulsifier and a chelating agent.
Scope and usage: China's "food additives health standards" (GB 2760-1996) states:” Trisodium phosphate can be used for canned food, fruit juice drinks, dairy products and plant protein drinks, the maximum amount for the above terms is 0.5g/kg; for western-style ham and meat products, the maximum amount is 3.0g/kg; for cheese, the maximum amount is 5.0g/kg; for beverages, the maximum amount is 1.5g/kg.”
When using composite phosphate, China has a regulation: with the total amount of phosphate, canned food and meat products cannot exceed 1.0g/kg; condensed milk cannot exceed 0.50g/kg. Using the sodium pyrophosphate, sodium tripolyphosphate and trisodium phosphate together, with the total amount of phosphate, cannot exceed 5g/kg; smoked ham for western-style cooking cannot exceed 5g/kg; for ham cannot exceed than 8g/kg.
Toxicity
The Adl is at the range of 0～70 mg/kg(with the total amount of phosphate) and the LD50>2 g/kg(tested by the marmot orally). The sodium phosphate can be used in canned food, fruit juice drinks, dairy products and soy milk etc, the maximum amount is 0.5 g/kg.
Hazard
Low toxicity by ingestion.
Biochem/physiol Actions
Sodium phosphate tribasic also referred to as Trisodium phosphate or TSP is a widely used cleaning agent. Trisodium phosphate disrupts cytoplasmic as well as outer membranes of Salmonella enterica cells and hence prevents the spread of bacteria. Further, it is corrosion inhibitor for iron and inhibits the rate of the anodic iron dissolution reaction in unbuffered solutions.
Purification Methods
It crystallises from warm dilute aqueous NaOH (1mL/g) on cooling to 0o.
Check Digit Verification of cas no
The CAS Registry Mumber 10101-89-0 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,0,1,0 and 1 respectively; the second part has 2 digits, 8 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 10101-89:
(7*1)+(6*0)+(5*1)+(4*0)+(3*1)+(2*8)+(1*9)=40
40 % 10 = 0
So 10101-89-0 is a valid CAS Registry Number.
InChI:InChI=1/H3O4P.12H2O/c1-5(2,3)4;;;;;;;;;;;;/h(H3,1,2,3,4);12*1H2/p-3
