Calcium perphosphate,ammonified,granular
Calcium perphosphate,ammonified,granular
CAS: 7757-93-9
Molecular Formula: CaHO4P
Calcium perphosphate,ammonified,granular - Names and Identifiers
Calcium perphosphate,ammonified,granular - Physico-chemical Properties
| Molecular Formula | CaHO4P |
| Molar Mass | 136.06 |
| Density | 2.306（16℃） |
| Melting Point | 370°C(decomposition) |
| Water Solubility | Sparingly soluble in water, practically insoluble in cold water. |
| Solubility | Practically insoluble in water and in ethanol (96 per cent). It dissolves in dilute hydrochloric acid and in dilute nitric acid. |
| Appearance | gel (aged) |
| Color | White |
| Solubility Product Constant(Ksp) | pKsp: 7 |
| Merck | 13,1697 |
| PH | 7 (10g/l, H2O, 20°C) suspension |
| Storage Condition | 2-8°C |
| Stability | Stable. Incompatible with strong oxidizing agents. |
| MDL | MFCD00010909 |
| Physical and Chemical Properties | White monoclinic crystalline powder. Odorless and tasteless. Soluble in dilute hydrochloric acid, dilute nitric acid, acetic acid, water-soluble, insoluble in ethanol. |
| Use | Used for various crops as base fertilizer |
Calcium perphosphate,ammonified,granular - Risk and Safety
| Hazard Symbols | Xi - Irritant |
| Risk Codes | 36/37/38 - Irritating to eyes, respiratory system and skin. |
| Safety Description | S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S36 - Wear suitable protective clothing. S24/25 - Avoid contact with skin and eyes. S22 - Do not breathe dust. |
| WGK Germany | 3 |
| RTECS | TB8528000 |
| TSCA | Yes |
| HS Code | 2835 25 00 |
| Toxicity | LD50 orally in Rabbit: 10000 mg/kg LD50 dermal Rabbit > 7940 mg/kg |
Calcium perphosphate,ammonified,granular - Upstream Downstream Industry
| Raw Materials | Sulfuric acid Sulfuric acid Potassium Sulphate Potassium Sulphate Urea Urea Calcium superphosphate |
Calcium perphosphate,ammonified,granular - Nature
Open Data Verified Data
white monoclinic crystalline powder. Odorless and tasteless. The relative density was 2. 306 (16 ℃). Soluble in dilute hydrochloric acid, dilute nitric acid, acetic acid, water-soluble, insoluble in ethanol. Two crystals of water are lost at 115-120 °c and calcium pyrophosphate is formed when heated above 400 °c. Less hygroscopic.
Last Update：2024-01-02 23:10:35
Calcium perphosphate,ammonified,granular - Preparation Method
Open Data Verified Data
- no filtration, no defluorination, one-stage neutralization method: phosphate rock powder of 40~80 mesh and 15% ~ 20% hydrochloric acid are metered and then added to the extractor with stirring, and the phosphate rock powder reacts with hydrochloric acid to generate phosphoric acid and calcium chloride, after the reaction, the liquid overflow into the neutralizer after extraction, add a certain amount of milk of lime solution (calcium oxide 80g/L) or with 75um limestone powder suspension at 50 Deg C for neutralization to pH = 4~5, so that PO ~-complete precipitation. The obtained precipitate was separated by centrifugation after thickening and sedimentation, and then washed with water to obtain a finished calcium hydrogen phosphate for fertilizer.
- Monocalcium phosphate method: the superphosphate is leached for 10~15 min at (35±5)℃ with water stirring, then centrifuged, and phosphogypsum is discarded to obtain Monocalcium phosphate solution, defluorination was carried out by adding sodium chloride (about 40g per liter of solution plus sodium chloride), controlling the defluorination temperature (45±5) ° C., stirring for 30min, and then settling about th. The defluorinated Monocalcium phosphate solution is added with a lime milk solution containing calcium oxide 80g/L for stirring and neutralization, and the pH value is controlled at about 2-2.5, and the neutralization temperature is not higher than 40 ° C. To generate calcium hydrogen phosphate precipitate, by centrifugal separation, the finished product of calcium hydrogen phosphate for fertilizer was prepared.
Last Update：2022-01-01 11:03:02
Calcium perphosphate,ammonified,granular - Standard
Authoritative Data Verified Data
This product contains CaHPO, should be 98. 0% ~ 103.0%.
Last Update：2024-01-02 23:10:35
Calcium perphosphate,ammonified,granular - Trait
Authoritative Data Verified Data
- This product is white or off-white powder; Odorless.
- This product is almost insoluble in water or ethanol, and is easily soluble in dilute hydrochloric acid or dilute nitric acid.
Last Update：2022-01-01 11:20:46
Calcium perphosphate,ammonified,granular - Introduction
White amorphous powder. Soluble in dilute hydrochloric acid, nitric acid, phosphoric acid, acetic acid, sulfurous acid to produce soluble acid phosphate. Slightly soluble in water.
Last Update：2022-10-16 17:28:39
Calcium perphosphate,ammonified,granular - Use
Open Data Verified Data
It is mainly used as fertilizer, and can be used in acidic, slightly acidic or neutral soil. It is suitable for all kinds of crops. It is also used as a stabilizer for plastics.
Last Update：2022-01-01 11:02:59
Calcium perphosphate,ammonified,granular - Differential diagnosis
Authoritative Data Verified Data
acid solution of this product shows the reaction of calcium salt and phosphate to identify (2) and (3) (General rule 0301).
Last Update：2022-01-01 11:20:47
Calcium perphosphate,ammonified,granular - Safety
Open Data Verified Data
packed in polyethylene-lined plastic bags, with a cover of 25kg or 50kg in net weight, in either or in woven bags. Should be stored in a cool, ventilated, dry warehouse, to avoid open storage. It is not allowed to be stored and mixed with toxic substances and polluting substances; During transportation, it should be protected from rain, sun and moisture. Handling should be careful to prevent package breakage. Fire, water, sand, carbon dioxide fire extinguishing.
Last Update：2022-01-01 11:03:03
Calcium perphosphate,ammonified,granular - Exam
Authoritative Data Verified Data
chloride
take 0.20g of this product, add 1 0m l of water and 2 m l of nitric acid, slowly heat until dissolved, cool, and check according to law (General rule 0801), with standard gasification sodium solution 1 0. Compared with the control solution made of 0M l, it should not be more concentrated (0. 05%).
salt
take this product l .O g, add a small amount of dilute hydrochloric acid, so that it can be dissolved, dilute to 100ml with water, shake well, filter, take 20ml of filtrate, add 5ml of water, check according to law (General Rule 0 8 0 2 ) , with standard potassium sulfate solution 4. Compared with the control solution made of 0M l, it should not be more concentrated (0 .2%).
cyanide
A plastic appliance was used for the operation. Precision weigh% sodium fluoride dried at 1051C for 4 hours, put it in a 100ml measuring flask, add appropriate amount of water to dissolve, and add buffer solution (take sodium citrate 73. 5G, add water 250ml to dissolve, that is, 5 0 .0 m l, diluted with water to the scale, shake, that is, the fluoride standard stock solution (l/lm equivalent to F lm g). The appropriate amount of fluoride standard stock solution was accurately taken, and the standard solution containing F 0 .1, 0.2, 0.5 and 1. 0 was prepared by adding buffer solution to dilute each lm l. Take about 2.0g of this product, weigh it accurately, put it in a 100ml measuring flask, add 20ml of water and hydrochloric acid 2.0ML, shake to dissolve, add 50ml of buffer solution, dilute to the scale with water, and shake to obtain the test solution. With fluoride ion selective electrode as indicator electrode and saturated calomel electrode as reference electrode, the potential response values (m V) of the standard solution and the test solution were measured respectively. The standard curve is drawn with log c of fluoride ion concentration (p g /m l) as the z axis and the potential response value as the y axis, according to the measured potential value of the test solution, the concentration of fluoride ion in the Test Solution is determined from the standard curve. 005%.
carbonate
take this product l .O g, add water 5 m l, mix, add hydrochloric acid 2ml, do not bubble boiling.
insolubles in hydrochloric acid
take about 5.0g of this product, weigh it accurately, add 10ml hydrochloric acid and 40ml water, heat and dissolve it, dilute it to 100ml with water, if there is insoluble matter, filter it, the filter residue was washed with water until the washing liquid was free from the reaction of the vaporized product, and dried at 105 ° C. For 1 hour, and the remaining residue should not pass through 5mg.
ignition weight loss
take this product about l .O g, precision weighing, at 800X; Ignition to constant weight, loss weight should be 6.6% ~ 8.5%.
barium salt
take this product 0. 50g, add 10 m l of water, heat, add hydrochloric acid Dropwise, stir with the drop, dissolve, filter, add 2ml of potassium sulfate test solution to the filtrate, and do not cause turbidity within 10 minutes.
Iron Salt
take this product 2. 5G, add dilute hydrochloric acid 20ml, heat to dissolve, dilute to 50 m l with water, take the dilution 1 .0 m l, checked according to law (General rule 0807), with standard iron solution 2. 0 m l made of control liquid comparison, not deeper (0. 04%).
lead salt
take this product about 0 .2G, precision weighing, 50ml flask, with nitric acid solution (1-100) dissolved and diluted to the scale, shake, as a test solution; take an appropriate amount of standard lead solution (equivalent to 10 tons of Pb per lm l) and dilute it with nitric acid solution (1-100) to make it contain Ong, 10ng, 20ng, 30ng and 40ng per lm l, 50Ng of the control solution. According to Atomic Absorption Spectrophotometry (General Principles 0406 first method>, the graphite furnace is used as an atomizer, measured at a wavelength of 283.3mn, and calculated. Lead should not exceed 0.0005%.
arsenic salt
take this product l .O g, add hydrochloric acid 5M l and water 23tnl after dissolving, according to law inspection (General Principles 0822 The first law), should comply with the provisions (0. 0002%).
Last Update：2022-01-01 11:20:48
Calcium perphosphate,ammonified,granular - Content determination
Authoritative Data Verified Data
take this product about 0 .6G, precision weighing, add dilute hydrochloric acid 1 0 m l, heat to dissolve, cool, move to 100ml measuring flask, dilute with water to the scale, shake; Take 1 0 m l for precision measurement, add 50ml of water, adjust to Neutral with ammonia test solution, add 2 5 m L of ethylenediamine tetraacetic acid disodium titration solution (0.05mol/l), heat for several minutes, and cool, add 10ml of ammonia-gasified ammonium buffer (pH 10.0) and a small amount of Chrome Black T indicator, and use zinc titration solution (0.0 5 M o l/U titration to the solution is purple red, and the results of the titration with blank test correction. Each lm l of ethylene diamine tetraacetic acid disodium titration solution (0.05M o l/L) is equivalent to 6.803mg of cahp04.
Last Update：2022-01-01 11:20:49
Calcium perphosphate,ammonified,granular - Category
Authoritative Data Verified Data
pharmaceutical excipients, diluents.
Last Update：2022-01-01 11:20:49
Calcium perphosphate,ammonified,granular - Storage
Authoritative Data Verified Data
sealed storage.
Last Update：2022-01-01 11:20:49
Calcium perphosphate,ammonified,granular - Reference Information
| EPA chemical substance information | information provided by: ofmpeb.epa.gov (external link) |
| Introduction | dicalcium phosphate (also known as dicalcium phosphate) is a compound, usually dihydrate (CaHPO4 · 2H2O) but can be changed to an anhydrous form by heating. Dibasic calcium phosphate is practically insoluble in water with a solubility of only 0.02g/100 at 25°C. |
| properties | calcium hydrogen phosphate is a white monoclinic crystalline powder, odorless and tasteless, soluble in dilute hydrochloric acid, nitric acid, acetic acid, slightly soluble in water. The relative density was 2.32. Stable in air. Water loss began at 75 degrees C to generate anhydrous calcium hydrogen phosphate. |
| Use | calcium hydrogen phosphate can be used as buffering agent; Coagulant; Flour improver nutritional supplement, yeast food, emulsifier, curing agent, antioxidant Synergist, stabilizer. Such as canned cherry core material, milk powder, cream powder, cold drinks, ice cream, potato, snack food, flour, cake, cake, baking quality improver. as a supplementary feed for poultry, it can promote the digestion of the feed, and can also treat the fistula disease, cartilage disease and anemia of livestock. As a food feed additive, to supplement the phosphorus and calcium in livestock feed. as a fortifier (calcium supplement) and leavening agent, China's provisions can be used for biscuits, infant formula food, the maximum use of 1.0g/kg; Can also be used as a quality improver for fermented flour products, according to the production needs of appropriate use. used in various crops as base fertilizer can be widely used in bone substitute materials, plastic and cosmetic surgery, dental, chromatography purification, calcium supplements. |
| range of use | calcium hydrogen phosphate as a coagulant can be used in biscuits, infant formula. |
| production method | double decomposition method firstly, phosphoric acid and soda ash are neutralized to form a mixture of sodium dihydrogen phosphate and disodium hydrogen phosphate, then add slightly less than the theoretical amount of calcium chloride solution, double decomposition reaction under high-speed stirring; And then neutralized to methyl red and methyl blue mixed indicator, from purple to light green, to precipitate, finally, the precipitate was separated and washed with water to obtain a final product. 4H2PO4+3Na2CO3 → 2Na2HPO4+2nah2po4 [CaCl2] → CaHPO4 · 2H2O direct neutralization method high quality industrial lime is obtained by calcining limestone, then, the reaction was digested with 4 times of water at 90 ° C. For 75min, filtered and then diluted to obtain a milk of lime with a relative density of 1.03; 85% of the food-grade hot phosphoric acid was diluted to a solution with a relative density of 1.21, under high-speed stirring, the milk of lime is added to the phosphoric acid solution, the reaction temperature is controlled at 40~45 ℃, and the milk of lime is controlled to slowly add after precipitation of white precipitate; The terminal pH value of the reaction is 7.2, after aging for 0.5h, the product was finally obtained by washing, centrifugal dehydration, drying and grinding. H3PO4 + Ca(OH)2 → CaHPO4 · 2H2O (1) Water + calcium method. With agricultural ordinary superphosphate as raw material, obtained by multi-stage water extraction, defluorination, Lime milk neutralization. The soluble phosphorus pentoxide in superphosphate is extracted from the solid phase by multistage extraction with water (solid-liquid ratio 1.0-4.1). The extraction is accompanied by addition of sodium chloride or Activated Silica for defluorination purification. The phosphogypsum residue was then removed by plate-and-frame pressure filtration. The filtrate was neutralized with milk of lime containing between 6% and 8% of Cao, and the neutralized solution was allowed to stand, filtered and dried to obtain a finished product. (2) sulfuric acid extraction of phosphoric acid direct neutralization method. The phosphoric acid extracted by sulfuric acid is metered into the defluorination tank, and the defluorination agent is added to remove fluorine, arsenic, lead, etc. After defluorination, the phosphoric acid first enters into a neutralization tank, and is neutralized with milk of lime. The filter residue is filtered as a byproduct fertilizer, and the filtrate enters into a second-stage neutralization tank, and is further neutralized with milk of lime, The filtered filtrate was returned to prepare a milk of lime, and the filter cake was air dried and pulverized to a product. Phosphoric acid can also be obtained by direct neutralization with limestone: The calcined limestone is charged with 70%-80% phosphoric acid, and mixed and stirred at 40-50 ° C. To form a mixture of calcium hydrogen phosphate and calcium dihydrogen phosphate. After curing, cut it with a cutter, and stack it in the curing library for 48h. During this time, the remaining calcium carbonate reacts with dicalcium phosphate to form dicalcium phosphate. The curing material contains 15%-20% of water, and is baked in a rotary kiln to below 3% of water content, and then pulverized to obtain a finished product. |
| category | toxic substances |
| flammability hazard characteristics | non-combustible; A pollution dust; One of air pollutants |
| storage and transportation characteristics | warehouse ventilation and low temperature drying |
| extinguishing agent | Water |
| toxic substance data | information provided by: pubchem.ncbi.nlm.nih.gov (external link) |
Last Update：2024-04-09 20:52:54
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Raw Materials for Calcium perphosphate,ammonified,granular