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Sodium Phosphate, Dibasic CAS 7558-79-4

Molecular Formula: HNa2O4P

Formula Weight: 141.96

ZSpharmac: Sodium Phosphate, Dibasic Supplement

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Product Name: Sodium Phosphate, Dibasic
CAS No: 7558-79-4
Purity: 99%

Basic Info

Product Name:Sodium Phosphate, Dibasic
Other Names:pH standard-Disodium hydrogen
CAS:7558-79-4
Place of Origin:Shandong, China
Brand Name:ZSpharmac
Type:Chemical Raw Materials
Appearance:White Powder
EINECS No.:231-448-7
Storage:Store at +5°C to +30°C.
Provide:Sodium Phosphate, Dibasic MSDS;
Sodium Phosphate, Dibasic COA

What is Sodium Phosphate, Dibasic?

Sodium Phosphate, Dibasic is an important chemical raw material, which is widely used in industrial sectors such as biological fermentation, food, medicine, feed, chemical industry and agriculture. The manufacturing methods of disodium hydrogen phosphate mainly include neutralization method, extraction method, ion exchange method, metathesis method, direct method, crystallization method and electrolysis method.
Phosphate is the most widely used food quality improver in the world. To sum up, the functions of phosphate in food processing mainly include two aspects: one is quality improver. The special structure of phosphate makes it complex with metal ions. , Increase the water holding capacity of the product, adjust the pH value, buffer, and interact with protein, which can play the role of antibacterial preservation, buffering and anti-caking, emulsifying and dispersing; the second is a nutritional fortifier. Calcium and iron fortifier for children’s food and nutritionally fortified food. It is safe, non-toxic, can improve food quality and has the effect of supplementing iron and zinc to the human body. At the same time, phosphorus has an important physiological function in the human body. It participates in many metabolic processes that are very important to life activities in the form of phosphate (PO43-): Phosphate in the blood is one of the important components of the blood buffer system. It has a buffering effect in maintaining the acid-base balance of body fluids; it constitutes phospholipids, and then combines with proteins, which is the basic substance for the synthesis of cell walls in the human body; participates in many metabolic reactions, especially oxidative phosphorylation; participates in DNA, RNA and many coenzymes. . Therefore, it is widely used in various fields of processed food and plays an important role in the improvement of food quality.

Sodium Phosphate, Dibasic Properties:

Melting point 243-245 °C
density 1.064 g/mL at 20 °C
vapor density 4.9 (vs air)
FEMA 2398 | DISODIUM PHOSPHATE
storage temp. Store at +5°C to +30°C.
solubility H2O: 0.5 M at 20 °C, clear, colorless
form powder
color White
PH8.9-9.2 (25℃, 50g/L in water)
pka(1) 2.15, (2) 6.82, (3) 12.38 (at 25℃)
Water Solubility >=10 g/100 mL at 20 ºC

 

Sodium Phosphate, Dibasic Uses

  1. Sodium Phosphate, Dibasic is used as industrial water treatment agent, printing and dyeing detergent, quality improver, antibiotic culture agent, biochemical treatment agent, etc.
  2. Sodium Phosphate, Dibasic is used as a flame retardant for fabrics, wood and paper, and a weighting agent for silk.Used in place of borax in soldering and brazing.
  3. Sodium Phosphate, Dibasic is used as a food quality improver.
  4. Sodium Phosphate, Dibasic is used as analytical reagent, buffer, water softener and fire retardant in printing and dyeing industry, and also used for fabric weight gain.
  5. Sodium Phosphate, Dibasic is used as an analytical reagent and a pH reference reagent.
  6. Sodium Phosphate, Dibasic is used as flame retardant for wood, paper and fabric, glaze and welding flux, mordant for dyeing, hydrogen peroxide bleach stabilizer, boiler water softener, etc.
  7. Sodium Phosphate, Dibasic is used as water softener.
  8. Sodium Phosphate, Dibasic is used in ICP-AES, AAS, AFS, ICP-MS, ion chromatography, etc. Standard solutions for titration analysis.

Preparation of Sodium Phosphate, Dibasic

report one,

A method of utilizing industrial wet purification of phosphoric acid to manufacture food-grade disodium hydrogen phosphate, the steps of which are:
(1) Dilute with water to take the qualified product and the industrial wet purification phosphoric acid with a mass percentage concentration of 85% in accordance with HG/T4069-2008 “Industrial Wet Purification of Phosphoric Acid” in an acid-resistant container. Under the condition of stirring, add its mass The reverse osmosis method pure water with a multiple of 1.12 times was continuously stirred for 0.5 hours to obtain an industrial wet purification phosphoric acid diluent with a mass percentage concentration of 40%. During the whole process of controlling this step, the stirring speed is 100rpm.
(2) Neutralization reaction and defluorination and sulfur removal step (1) 1.85kg of industrial wet purification phosphoric acid dilution solution with a concentration of 40% by mass was placed in an acid-resistant container, and under constant stirring, 0.5% by mass of barium carbonate was added. As a desulfurizing agent, continue stirring for 4.5 hours until no bubbles (carbon dioxide) are generated, so that the barium carbonate is fully dissolved and fully reacted with the fluoride ions and sulfate radicals in the phosphoric acid diluent to obtain a reaction mixture; The sodium hydroxide solution with a concentration of 45% neutralizes the reaction mixture to a pH of 4.2, and continues to stir for 7 hours to obtain a neutralization solution; the temperature of the neutralization solution is controlled to 30 ° C, and the membrane material is silicon carbide, and the membrane pores are 0.04 μm and 0.04 μm. The microporous membrane equipment in the form of the membrane module is a honeycomb-type inner tubular membrane to filter it precisely, to separate barium sulfate, barium fluorosilicate and other solid particles, and to obtain a precision-filtered neutralization solution for use. During the whole process of controlling this step, the stirring speed is 145rpm.
(3) Oxidative removal of arsenic, slightly alkaline removal of heavy metals and membrane filtration, under the condition of constant stirring, use sodium hydroxide solution with a mass percentage concentration of 45% to adjust the pH of the precision-filtered neutralization solution obtained in step (2) to 7.5, Add bleaching powder with a mass fraction of 1% of the neutralization solution as an oxidant, heat the temperature of the mixture to 85 °C and maintain it at 85 °C, and keep it under reflux for 4.5 hours under stirring. After oxidation, turn on the cooling water to reduce the temperature of the mixture to 40 °C, and continue After stirring for 5 hours, it was precisely filtered with a microporous membrane device with a membrane material of silicon carbide, a membrane pore of 0.04 μm and a membrane module form of a honeycomb-type inner tubular membrane to separate barium arsenate, sodium arsenate, lead oxide and oxide Cadmium and other insolubles, the micro-alkaline heavy metal removal and oxidative arsenic removal solution are used for use. During the whole process of controlling this step, the stirring speed is 115rpm.
(4) pH adjustment and concentration Under the condition of constant stirring, with the sodium hydroxide solution whose mass percentage concentration is 45%, the pH of the slightly alkaline de-heavy metal and oxidative de-arsenic solution obtained in step (3) is adjusted to 9.3 to obtain disodium hydrogen phosphate solution With rotary evaporation vacuum concentration method, under the condition that vacuum tightness is 0.95MPa and temperature is 95 ℃, the disodium hydrogen phosphate solution is concentrated to mass percent concentration is 50.5%, obtains disodium hydrogen phosphate concentrated solution for subsequent use. The stirring speed of this step is controlled to be 145 rpm.
(5) Cooling and Crystallization Transfer the concentrated solution of disodium hydrogen phosphate obtained in step (4) into the crystallization equipment, and after cooling to 30 ° C for 10 hours to crystallize disodium hydrogen phosphate, reduce its temperature to 5 ° C at a cooling rate of 1.5 ° C/hour, and continue Crystallization for 30 hours, until no crystallization is generated; the crystallization mixture obtains the wet crystallization of disodium hydrogen phosphate and the crystallization mother liquor of disodium hydrogen phosphate through solid-liquid separation (the crystallization mother liquor of disodium hydrogen phosphate can be obtained by concentration-crystallization or concentration-spray drying. Agricultural grade disodium hydrogen phosphate, used as agricultural sodium phosphate fertilizer), take disodium hydrogen phosphate wet crystallization for use.
(6) Crystallization and drying: Wet crystallization of disodium hydrogen phosphate obtained in step (5), and use hot air with a temperature of 105 ° C, a speed of 3.5 m/s and a relative humidity of 70% to dry to the mass percentage of moisture < 2%, and then cool to obtain Food grade disodium hydrogen phosphate product 0.97kg.
After determination, the obtained food grade disodium hydrogen phosphate is white crystalline powder or granules; disodium hydrogen phosphate content (Na2HPO4) (on a dry basis, mass percentage, %)≧98.0, water insoluble matter≤0.2, Arsenic (As, mg/kg)≤3, heavy metal (calculated as Pb, mg/kg)≤10, lead (Pb, mg/kg)≤4, fluoride (calculated as F, mg/kg)≤50, pH (10g/L) is 8.8~9.2, drying weight loss (mass percentage, %)≤2.0. All physical and chemical indicators meet or exceed the requirements of the national food safety standard GB25568-2010 “Food Additive Disodium Hydrogen Phosphate”.

report two,
A method of utilizing wet-process dilute phosphoric acid to manufacture food-grade disodium hydrogen phosphate, the steps of which are:
(1) Membrane filtration: take 1.85kg of wet dilute phosphoric acid (aqueous solution) with a phosphoric acid content of 40% (mass fraction), a sulfate content of 1.5% (mass fraction) and a fluoride ion content of 0.5% (mass fraction) in acid-resistant In the container, use a microporous membrane device with a membrane material of silicon carbide, a membrane pore of 0.04 μm and a membrane module form of a honeycomb-type inner tubular membrane to filter it precisely to separate pigment particles, suspended solids and solid particles, etc., to obtain precise filtration. Wet-process dilute phosphoric acid for use.
(2) Neutralization reaction and simultaneous defluorination and desulfurization: take the precision-filtered wet dilute phosphoric acid obtained in step (1) in an acid-resistant container, and under constant stirring, add barium carbonate with a mass fraction of 4.1% as a defluorination and desulfurization agent, and continue to stir For 4.5 hours, until no bubbles (carbon dioxide) are generated, the barium carbonate is fully dissolved and fully reacted with fluoride ions and sulfate radicals in the precision-filtered wet-process dilute phosphoric acid to obtain a reaction mixture; maintain stirring, with a mass percentage concentration of 45% The sodium hydroxide solution was used to neutralize the reaction mixture to a pH of 4.2, and continued stirring for 7 hours to obtain a neutralization solution; the temperature of the neutralization solution was controlled to 30°C, and the membrane material was silicon carbide, the membrane pore was 0.04 μm, and the membrane module was in the form of The microporous membrane equipment of the honeycomb type inner tubular membrane is used for precision filtration, and the barium sulfate, barium fluorosilicate and other solid particles are separated, and the precision-filtered neutralization solution is obtained for use. During the whole process of controlling this step, the stirring speed is 145rpm.
(3) Oxidative removal of arsenic, slightly alkaline removal of heavy metals and membrane filtration: under constant stirring, use sodium hydroxide solution with a concentration of 45% by mass to adjust the pH of the precision-filtered neutralization solution obtained in step (2) to 7.5 , adding hydrogen peroxide with a mass fraction of 4% of the neutralization liquid as an oxidant, heating the temperature of the mixture to 85 ° C and maintaining it at 85 ° C, under the condition of stirring, reflux for 4.5 hours, and then turn on the cooling water to reduce the temperature of the oxidizing liquid to 40 ° C , continue to stir for 5 hours, and use the microporous membrane equipment whose membrane material is silicon carbide, the membrane pore is 0.04 μm and the membrane module form is honeycomb type inner tubular membrane to be finely filtered to separate barium arsenate, sodium arsenate and lead oxide. and cadmium oxide and other insolubles, the micro-alkaline heavy metal removal and oxidative removal of arsenic solution should be used for use. During the whole process of controlling this step, the stirring speed is 115rpm.
(4) pH adjustment and concentration: under the condition of constant stirring, use the sodium hydroxide solution with a mass percentage concentration of 45% to adjust the pH of the slightly alkaline de-heavy metal and oxidative de-arsenic solution obtained in step (3) to 9.3 to obtain dihydrogen phosphate. Sodium solution; use rotary evaporation vacuum concentration method under the condition that vacuum degree is 0.95MPa and temperature is 95 ℃, the disodium hydrogen phosphate solution is concentrated to the mass percentage concentration of disodium hydrogen phosphate is 50.5%, obtains disodium hydrogen phosphate Reserve liquid concentrate. The stirring speed of this step is controlled to be 145 rpm.
(5) Cooling and crystallization: transfer the concentrated disodium hydrogen phosphate obtained in step (4) into the crystallization equipment, cool down to 30 ° C for 10 hours to crystallize disodium hydrogen phosphate, and reduce its temperature to 5 ° C at a cooling rate of 1.5 ° C/hour, Continue to crystallize for 30 hours, until no crystals are formed; the crystallization mixture obtains the wet crystallization of disodium hydrogen phosphate and the crystallization mother liquor of disodium hydrogen phosphate through solid-liquid separation (the crystallization mother liquor of disodium hydrogen phosphate can be obtained by concentration-crystallization or concentration-spray drying. Obtain agricultural grade disodium hydrogen phosphate, used as agricultural sodium phosphate fertilizer), take disodium hydrogen phosphate wet crystallization for use.
⑹Crystallization and drying: Wet crystallization of sodium dihydrogen phosphate obtained in step ⑸, and dry it with hot air with a temperature of 105°C, a speed of 3.5m/s and a relative humidity of 70% to the mass percentage content of moisture < 2%, and then the solution is cooled. 0.97kg of food grade disodium hydrogen phosphate product was obtained.
After determination, the obtained food grade disodium hydrogen phosphate is white crystalline powder or granules; disodium hydrogen phosphate content (Na2HPO4) (on a dry basis, mass percentage, %)≧98.0, water insoluble matter≤0.2, Arsenic (As, mg/kg)≤3, heavy metal (calculated as Pb, mg/kg)≤10, lead (Pb, mg/kg)≤4, fluoride (calculated as F, mg/kg)≤50, pH (10g/L) is 8.8~9.2, drying weight loss (mass percentage, %)≤2.0. All physical and chemical indicators meet or exceed the requirements of the national food safety standard GB25568-2010 “Food Additive Disodium Hydrogen Phosphate”.
report three.
The sodium carbonate solution with a mass concentration of 10% was slowly added to 200 mL of dilute phosphoric acid with a specific gravity of 1.13, and neutralization was carried out. After the solution was concentrated by evaporation, disodium hydrogen phosphate crystals were obtained. After analysis and testing, the product meets the index requirements of the national standard GB1909-1987 for food additive disodium hydrogen phosphate dodecahydrate.

About Us

The production base is located in Zhangqiu chemical industry park and Tai’an high-tech chemical industry park. laboratory and workshop in strict accordance with the GMP standard and the product fit national ISO9001 and ISO2000 standards.

“Zhishang” products are exported to Europe, North and South America, the Middle East, Asia Pacific and Africa area, so as to establish a long-term and stable cooperation relationship with customer in the world.

Company Info
  • Business Type: Manufacturer
  • Product Range: Additive , Chemical Auxiliary & Catalyst , Organic Chemicals
  • Products/Service: Organic Intermediate,Inorganic Chemistry, APIs, Dyestuffs And Pigments, Fragrance And Spices, Food Additives
  • Total Employees: 51~100
  • Capital (Million US $): 10000000RMB
  • Year Established: 2016
Production Capacity
  • No. of Production Lines : 8
  • No. of QC Staff : 5 -10 People
  • OEM Services Provided : yes
  • Factory Size (Sq.meters) : 3,000-5,000 square meters
  • Certificate: ISO9001 , CE , GMP , API , MSDS
  • Factory Location : Diao Town Industry Park, Zhangqiu City, Jinan City, Shandong Province, China.

Service

Pre-Sales Service

* Prompt reply and 24 hours online, professional team to provide best price and high quality product.

* Sample testing support.

* Every batch of products will be tested to ensureits quality.

*The packing also can be according the customers` requirment.

*Any inquiries will be replied within 24 hours.

*we provide Commerical Invoice, Packing List, Bill of loading, COA , Health certificate and Origin certificate. If your markets have any special requirements, let us know.

 

After-Sales Service

*The fact of logistics information monitoring.

* Any questions about the product can be consulted at any time.

*Product has any problem can return.

FAQ

Do you accept sample order?

We will make samples before mass production, and after sample approved, we’ll begin mass production. Doing 100% inspection during production, then do random inspection before packing.

 

HOW TO CONFIRM THE PRODUCT QUALITY BEFORE PLACING ORDERS?

You can get free samples for some products,you only need to pay the shipping cost or arrange a courier to us and take the samples. You can send us your product specifications and requests,we will manufacture the products according to your requests.

What’s your MOQ?

Our MOQ is 1kg. But usually we accept less quantity such as 100g on the condition that sample charge is 100% paid.

Do you supply product report?

Yes. We’ll give you product analysis report before shipping.

  Is there a discount?

Different quantity has different discount.

Shipping

1. ≤50kg, Express delivery recommended, usually called as DDU service;

2. ≤500kg, Air shipping recommended, usually called as FOB, CFR, or CIF service;

3. >500kg, sea shipping recommended, usually called as FOB, CFR, or CIF service;

4. For high value products, please select air shipping and express delivery for safe.

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