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Send EmailAmmonium phosphate, Diammonium Phosphate, 7783-28-0
CAS: 7783-28-0
Molecular Formula: H9N2O4P
Names and Identifiers
| Name | Ammonium phosphate |
| Synonyms | phos-chek202 phos-chek259 Ammonium phosphate Diammonium Phosphate Di-Ammonium Phosphate SEC AMMONIUM PHOSPHATE PHOSPHORUS ICP STANDARD secondaryammoniumphosphate Ammonium phosphate dibasic Ammonium hydrogen phosphate Ammonium phosphate, dibasic Diammonium hydrogenphosphate phosphatedibasiqued'ammonium Diammonium hydrogen phosphate Phosphoricacid,diammoniumsalt SEC-AMMONIUM HYDROGEN PHOSPHATE Ammonium Hydrogen Orthophosphate di-Ammonium hydrogen orthophosphate Phosphorus ICP standard solution Fluka |
| CAS | 7783-28-0 |
| EINECS | 231-987-8 |
| InChI | InChI=1/2H3N.H3O4P/c;;1-5(2,3)4/h2*1H3;(H3,1,2,3,4)/p-1 |
| InChIKey | MNNHAPBLZZVQHP-UHFFFAOYSA-N |
Physico-chemical Properties
| Molecular Formula | H9N2O4P |
| Molar Mass | 132.06 |
| Density | 1.203g/mLat 25°C |
| Melting Point | 155°C (dec.)(lit.) |
| Water Solubility | 58 g/ 100mL (10 ºC) |
| Solubility | H2O: 1M at20°C, clear, colorless |
| Vapor Presure | 0.076Pa at 20℃ |
| Appearance | White crystalline powder |
| Specific Gravity | 1.619 |
| Color | White |
| Maximum wavelength(λmax) | ['λ: 260 nm Amax: 0.065', , 'λ: 280 nm Amax: 0.065'] |
| Merck | 14,542 |
| PH | 7.6-8.2 (100g/l, H2O, 20℃) |
| Storage Condition | -20°C |
| Stability | Stable. Incompatible with strong acids, strong bases, strong oxidizing agents. |
| MDL | MFCD00010891 |
| Physical and Chemical Properties | Colorless transparent monoclinic crystal or white powder. density 1.619 soluble in water, insoluble in alcohol, acetone and ammonia. |
| Use | Used for printing plate making, medicine, fire prevention, electron tube, etc |
Risk and Safety
| Risk Codes | R36/37/38 - Irritating to eyes, respiratory system and skin. R20/21/22 - Harmful by inhalation, in contact with skin and if swallowed. R50 - Very Toxic to aquatic organisms |
| Safety Description | S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S36 - Wear suitable protective clothing. S61 - Avoid release to the environment. Refer to special instructions / safety data sheets. S37/39 - Wear suitable gloves and eye/face protection |
| UN IDs | UN 3465 6.1 / PGIII |
| WGK Germany | 1 |
| RTECS | TB9385000 |
| FLUKA BRAND F CODES | 3 |
| TSCA | Yes |
| HS Code | 31053000 |
| Toxicity | LD50 orally in Rabbit: 6500 mg/kg LD50 dermal Rabbit > 7950 mg/kg |
Upstream Downstream Industry
| Raw Materials | Ammonium hydroxide Sodium carbonate Phosphoric acid Ammonia |
Nature
diammonium hydrogen phosphate is a colorless transparent monoclinic crystal or a white powder. Relative density 1619; Melting point 190 °c. Soluble in water, the aqueous solution is alkaline, the pH of 1% aqueous solution is 8, and the pH value of 0.1mol/L solution is 7.8. Insoluble in alcohol and acetone. Exposure to air does not gradually lose about 8% of ammonia gas and becomes ammonium dihydrogen phosphate. Can react with ammonia to generate triammonium phosphate.
Preparation Method
industry mainly adopts the neutralization method, one is the thermal phosphoric acid and liquid ammonia neutralization reaction, the process is relatively simple; The other is the wet process phosphoric acid and liquid ammonia neutralization reaction. The method first in the wet extraction of phosphoric acid to add a certain amount of hydrogen peroxide, the divalent iron in phosphoric acid oxidation, and then with ammonia in the reaction, by pressure filtration, concentration, cooling crystallization, centrifugal separation, by drying, diammonium hydrogen phosphate was obtained.
Standard
This product is obtained from ammonium carbonate or liquid ammonia and phosphoric acid by concentration, crystallization and drying. The content of (NH4)2HP04 should be 96.0% ~ 102.0%.
Trait
- This product is colorless or white crystal or crystalline powder.
- This product is soluble in water and insoluble in acetone or ethanol.
Introduction
No smell, salty and cool. 8% ammonia can be lost in the air. Soluble in water, insoluble in ethanol and acetone.
Use
In the field of water treatment, it is mainly used as a corrosion inhibitor and a bacterial nutrient in the biochemical treatment of wastewater, and is also used as a water softener component of boiler water. It can also be used as a dry powder extinguishing agent, a welding flux, a culture nutrient for yeast, and a leavening agent for manufacturing fermented food and bread. In the fabric, paper, wood and plant fibers in the role of flame retardant. In addition, it is also used in the fields of fertilizer, feed additives, printing plate making, pharmacy, electron tube manufacturing, ceramic and enamel industry, etc.
Differential diagnosis
The product of aqueous solution of ammonium salt and phosphate identification reaction (General 0301).
Safety
mild skin and mucosal irritation, inhalation or ingestion can cause severe Diarrhea. It should be stored in a cool, ventilated and dry warehouse, and should not be stacked in the open air. Do not be affected with damp, prevent high temperature, prevent harmful pollution. Pay attention to moisture, sun protection, good ventilation during storage and transportation, and pay attention to do not damage the package when loading and unloading.
Last Update：2022-01-01 08:51:56
Exam
alkalinity
take 0.10g of this product, Add 10ml of water to dissolve, and measure according to law (General rule 0631). The pH value should be 7.6~8.2.
insoluble in water
take 20.0g of this product, heat 100ml of water to dissolve it, filter it with No. 4 vertical melting crucible dried at 105°C to constant weight, and wash the residue with of hot water for 10 times, after drying at 105°C for 2 hours, the remaining residue should not exceed 1 mg(0.005%).
chloride
take l.Og of this product and check it according to law (General rule 0801). Compared with the control solution made of 4.0ml of standard sodium chloride solution, it should not be more concentrated (0.004%).
sulfate
take this product 0.20g, check according to law (General rule 0802), and standard potassium sulfate solution 0.1% ML made of standard liquid comparison, not more concentrated ().
Iron Salt
take 1.0g of this product, add 15ml of water to dissolve, adjust the pH value to 2.0 with hydrochloric acid solution (1-2), add 1 ml of 2% ascorbic acid solution, acetic acid-sodium acetate buffer solution (pH4.5)5ml, 0.2% O-Phenanthroline solution (1 ml), diluted with water to 50ml, shake well, and place for 15 minutes. In case of color development, compare with 0807 of standard iron solution (general rule) and the control solution made by the same method, not deeper (0.002%).
lead salt
take 0.20g two parts of this product, put them in 50ml measuring flask respectively, dissolve and dilute one part with nitric acid solution (1-100) to the scale, shake well, and use it as a test solution. Another part of the precision plus the standard lead solution [take the standard lead solution (equivalent to 10ug of Pb per 1 ml), with nitric acid solution (1-100) dilute to prepare a solution containing 0.5ug of lead per 1 ml.] 2ml, dissolve and dilute to the mark with nitric acid solution (1-100), and shake to obtain a reference solution. Take Test Solution and reference solution, according to Atomic Absorption Spectrophotometry (General 0406 second method), with graphite furnace as atomizer, the absorbance a of the test solution and the absorbance B of the reference solution are measured at the wavelength of 283.3nm, and a shall not be greater than b-a (0.0005%).
arsenic salt
take 0.67g of this product, add 23ml of water to dissolve, add 5ml of hydrochloric acid, check according to law (General rule 0822 first law), should comply with the provisions (0.0003%).
Content determination
take this product about 0.6g, precision weighing, add new boiling cold water 40ml to dissolve, according to the potential titration method (General 0701), with sulfuric acid titration solution (0.lmol/L) titration. Each l of sulfuric acid titrant (0.1 mol/L) corresponds to 26.42mg of (NH4)2HPO4.
Category
pharmaceutical excipients, buffers and effervescent agents.
Storage
sealed storage.
Reference Information
, titrated with 0.1mol/L sulfuric acid to a pH of 4.6. Each mL of 0.1mol/L sulfuric acid corresponds to 13.21mg of diammonium hydrogen phosphate [(NH4)2HPO4].
| available fertilizer | diammonium phosphate, also known as diammonium phosphate (DAP), is a compound fertilizer containing nitrogen and phosphorus. Diammonium hydrogen phosphate is a high concentration of available fertilizer, soluble in water, dissolved solids less, suitable for all kinds of crops and soil, especially suitable for nitrogen and phosphorus crops, as base fertilizer or topdressing can be, it is advisable to apply it deeply. Diammonium phosphate, refers to the standard product containing N 18%,P2O 548%, the crystal shape for the oblique prisms, 25 ° C water solubility of 71%, the saturated solution of pH 8, much higher than monoammonium phosphate. Because the saturated solution of diammonium phosphate is alkaline, the fixation of iron and aluminum on phosphorus can be reduced by applying it to acidic soil, so that phosphorus can maintain high effectiveness. Therefore, diammonium phosphate is advocated for use in acidic soil. Application: high performance nitrogen and phosphorus binary fertilizer. common specifications: physical neutral fertilizer, diammonium hydrogen phosphate can be applied to any soil and the vast majority of crops, especially for the crops of ammonium and phosphorus, as basal fertilizer or topdressing, should be deep. Used as the curing agent of urea-formaldehyde resin adhesive, with 20% aqueous solution, the curing speed is the slowest. It is also used as an additive flame retardant. If a small amount of DAP is added to the natural rubber emulsion, Can effectively eliminate the magnesium ions in the latex, does not reduce the tensile strength of vulcanized natural rubber latex. Application: diammonium hydrogen phosphate has good miscibility with urea, ammonium nitrate and ammonium chloride. Because it does not contain potassium, it should be applied with potassium fertilizer (potassium chloride and potassium sulfate). |
| content analysis | |
| toxicity | ADI 0-70 mg/kg (calculated as phosphorus, FAO/WHO,1985). Generally Recognized As Safe (U. S. Food and Drug Administration, 1985). ADI 0-70 mg/kg (calculated as phosphorus, FAO/WHO,1985). Generally Recognized As Safe (U. S. Food and Drug Administration, 1985). ADI 0-70mg/kg (total phosphate in terms of phosphorus, FA0/WHO,2001). GRAS(FDA,§ 184.1141b,2000). |
| usage limit | GB 2760-96: meat products, lg/kg; Fruits and vegetables peeling, GMP. BATF(27CFR § 240.1051,2000): used as a yeast nutrient in wine manufacturing, 0.17%; ≤ 0.8% in alcoholic products. GB 2760-96 specifies processing aids for food industry that are allowed to be used, and is limited to GMP. |
| Use | industrial ingredients used as feed additives, flame retardants and fire extinguishing agents used as analytical reagents, buffer is a kind of high efficiency fertilizer which is widely used in vegetables, fruits, rice and wheat Water softening agent; Yeast food and so on. used in food industry as food leavening agent, dough regulator, yeast food, fermentation aid of brewing. It can be used as a buffer. used as a feed additive for ruminants. used in printing plate making, medicine, fire prevention, electron tube, etc. Fertilizer grade is mainly used as high concentration nitrogen and phosphorus compound fertilizer. Industrial grade for impregnation of wood and fabric to increase its durability; Can be used as a dry powder extinguishing agent, fluorescent light with phosphorus; Also used for printing plate, tube, ceramic, enamel and other manufacturing, wastewater biochemical treatment; it is used in military industry as a flame retardant for thermal insulation materials of rocket motors. |
| production method | the production of diammonium hydrogen phosphate by the neutralization method of thermal phosphoric acid and liquid ammonia reaction or extraction phosphoric acid and liquid ammonia reaction is the main method of industrial production at present, the former product has high purity and simple process; The latter uses wet extraction of phosphoric acid, low cost. Thermal phosphoric acid neutralization liquid ammonia method phosphoric acid is diluted with water (water: phosphoric acid = 1.3:1) to dilute phosphoric acid, which is metered into an enamel reaction tank with stirring and jacket, the ammonia gas is introduced into the circular tube ammonia gas distributor for neutralization reaction, and is filtered while hot until the Ph of the reaction solution is 8-9, and then is sent to the cooling crystallizer to precipitate crystals through cooling, the mother liquor was centrifuged and dried to obtain the final product of diammonium hydrogen phosphate. The mother liquor of H3PO4 +2NH3 →(NH4)2HPO4 centrifugal separation is sent to the iron remover to remove iron by adding ammonium sulfide. After filtration, the filtrate is concentrated and sent to the fine adjustment tank, ammonia is introduced into the cooling crystallizer after fine adjustment of Ph to 8-9. Phosphoric acid neutralization liquid ammonia extraction phosphoric acid to add a certain amount of hydrogen peroxide, the phosphoric acid solution of divalent iron oxidation, phosphoric acid into the tubular mixing reactor and ammonia neutralization reaction, after two stages of reaction, the Ph reached about 8.0, After filtering through a plate-and-frame filter press, the filtrate is sent to a fine adjustment tank to adjust the Ph to 7.8~8, sent to an evaporator to evaporate and concentrate to a relative density of 1.3, and put into a cooling crystallizer, after cooling, the crystallization liquid was centrifuged and dried to obtain the final product of diammonium hydrogen phosphate. The residue of H3PO4 +2NH3 →(NH4)2HPO4 filtered by plate-and-frame filter press is washed with water, the washing liquid and mother liquor are combined and sent to the reaction liquid storage tank for acid conditioning, and the impurities are removed by filtration and recycled. The residue after washing with water contains 35% of phosphorus pentoxide and 5% of ammonia after drying. It is a compound fertilizer with high fertilizer efficiency. in order to produce diammonium hydrogen phosphate for feed with wet-process phosphoric acid as raw material, the production process must be through two-step defluorination, three-stage ammonification, and pyrolysis of triammonium phosphate as diammonium hydrogen phosphate for feed. The production cost is lower than that of the method using yellow phosphorus as raw material. By wet-process phosphoric acid method, the extracted phosphoric acid containing 20% ~ 30% P2O5 and 1.2% ~ 2%F is sent to the reaction device through a gas purification system, and the impurities are subjected to three-stage amination to form a precipitate that is easy to filter, the precipitate is separated by filter press, and the filtrate is diammonium phosphate solution containing P2O5<15%, F 0.4%, SO42-2.5% ~ 3% and suspended solids about 1%, in order to further remove the dissolved impurities and part of the solid suspension, the filtrate was sent to another reaction apparatus to be saturated with ammonia, and then put into a cooling crystallizer to cool the crystals to form triammonium phosphate crystals. The crystallization was separated from the mother liquor through a conical sedimentation tank, and then subjected to centrifugal dehydration. The crystallization was put into a fluidized bed furnace to be pyrolyzed into diammonium hydrogen phosphate, which was dried, To prepare feed with diammonium hydrogen phosphate product, the H3PO4 +2NH3 →(NH4)2HPO4(NH4)2HPO4 + NH4OH →(NH)43PO4 + H2O(NH4)3HPO4? 3H2O[70 degrees C] →(NH4)2HPO4 + NH3 + 3H2O containing two ammonium hydrogen phosphate dust and ammonia gas mixture, after the cyclone separator dust, and then in the scrubber with wet process phosphoric acid spray absorption. at present, the main methods of industrial production are thermal phosphoric acid and the reaction of extraction phosphoric acid with liquid ammonia to produce diammonium hydrogen phosphate. The purity of the former product is high, and the cost of the latter product is low. Thermal phosphoric acid neutralization liquid ammonia method the thermal phosphoric acid is diluted with distilled water (water: phosphoric acid = 1.3:1) to dilute phosphoric acid, which is pumped with acid to the first-stage tubular reactor for neutralization reaction with ammonia gas, the reaction liquid is pumped into the second-stage tubular reactor to further react with ammonia, so that the pH value of the reaction liquid reaches about 8.0, and arsenic removing agent and heavy metal removing agent are added to purify the solution and filter, impurities such as arsenic and heavy metals are removed, and the filtrate is sent to the fine adjustment tank to adjust the pH value to 7.8~8.0, The product is sent to an evaporator for evaporation and concentration to a relative density of 1.3, sent to a cooling crystallizer, cooled and crystallized, centrifuged to separate the mother liquor, and then dried to prepare a finished product of edible diammonium hydrogen phosphate. Its H3PO4 +2NH3 →(NH4)2HPO4 In diammonium hydrogen phosphate solution, concentrated ammonia water is slowly added for neutralization reaction, and when the pH value is 14, it becomes triammonium phosphate solution, then it is cooled, crystallized, after centrifugation and drying. |
| category | toxic substances |
| toxicity grade | poisoning |
| Acute toxicity | Reference range: oral-rat LD50: 17000 mg/kg; Intraperitoneal-rat LDL0: 1000 mg/kg |
| flammability hazard characteristics | toxic nitrogen oxides, phosphorus oxides and ammonia fumes generated by heat |
| storage and transportation characteristics | warehouse ventilation and low temperature drying |
| fire extinguishing agent | dry powder, foam, sand, carbon dioxide, water mist |
