4861-19-2

Basic information

• Product Name: Urea phosphate
• Synonyms: Phosphoricacid,compd.withurea;Urea,compd.withphosphoricacid;Urea,phosphate(1:1);Ureaphosphate(1:1);Urea-phosphoricacid;UREA PHOSPHATE;Urea phosphate salt;CARBAMIDE PHOSPHATE
• CAS NO: 4861-19-2
• Molecular Formula: CH₅N₂O*H₂O₄P
• Molecular Weight: 158.05
• EINECS: 225-464-3
• Mol File: 4861-19-2.mol
• Article Data: 1

Chemical Properties

• Melting Point: 116-118 °C (dec.)(lit.)
• Boiling Point: 158 °C at 760 mmHg
• Flash Point: 311.2 °C
• Appearance: Crystals
• Density: 1.77[at 20℃]
• Vapor Pressure: 1.41mmHg at 25°C
• Solubility: H2O: 50 mg/mL, clear
• Water Solubility: 50 mg/mL
• CAS DataBase Reference: Urea phosphate(CAS DataBase Reference)
• NIST Chemistry Reference: Urea phosphate(4861-19-2)
• EPA Substance Registry System: Urea phosphate(4861-19-2)

Safety Data

• Hazard Codes: C
• Statements: 34
• Safety Statements: 22-24/25-45-36/37/39-26
• RIDADR: UN 3261 8 / PGII
• WGK Germany: 1
• Hazardous Substances Data: 4861-19-2(Hazardous Substances Data)

Usage

Chemical Properties

White, rhombic crystals. Very soluble in water and alcohol.

Uses

Different sources of media describe the Uses of 4861-19-2 differently. You can refer to the following data:
1. Urea Phosphate Salt is used in the production technology of fertilizers for fertigation of orchards and berry fields.
2. Catalyst for acid-setting resins, flame-proofing compositions, cleaning compounds, acidulant.

Hazard

Evolves toxic fumes when heated.

Flammability and Explosibility

Nonflammable

InChI:InChI=1/CH4N2O.H3O4P/c2-1(3)4;1-5(2,3)4/h(H4,2,3,4);(H3,1,2,3,4)

Synthetic route

CYANAMID (420-04-2) → urea phosphate (4861-19-2)

Conditions	Yield
With phosphoric acid; water

urea (57-13-6) → urea phosphate (4861-19-2)

Conditions	Yield
With phosphoric acid; water
With phosphoric acid at 40℃; under 3750.38 Torr; Industrial scale;	1327.8 g

ammonium hydrogen fluoride + urea phosphate (4861-19-2) → bis(ammonium) fluorophosphate

Conditions	Yield
byproducts: CO2, NH3; 170°C, 20-30 min; recrystn. from H2O/acetone;	98%
In neat (no solvent) byproducts: NH3, CO2; heating (200°C, 30 min); extn. (MeOH or MeOH/H2O (50/50)), recrystn. (MeOH/H2O or acetone/H2O);

urea phosphate (4861-19-2) → carbon dioxide (124-38-9) + ammonia (7664-41-7) + metaphosphoric acid

urea phosphate (4861-19-2) → C(2)H4N2O*(2)H3O4P

Conditions	Yield
With water-d2

urea phosphate (4861-19-2) → cyanuric acid (108-80-5)

Conditions	Yield
at 130°C;

urea phosphate (4861-19-2) → 2,4,6-triamino-s-triazine (108-78-1) + cyanuric acid (108-80-5) + ammonium cyclotriphosphate + carbamic Acid (463-77-4)

Conditions	Yield
With ammonium nitrate; urea In neat (no solvent) byproducts: NH3, CO2; heating (molar ration (NH2)2CO:H2PO4(1-) >3, 210°C, 2 h); extn. (MeOH or MeOH/H2O (50/50)), recrystn. (MeOH/H2O or acetone/H2O);

urea phosphate (4861-19-2) → ammonium dihydrogen phosphate (7722-76-1) + ammonium metaphosphate + carbon dioxide (124-38-9) + ammonia (7664-41-7) + urea (57-13-6)

Conditions	Yield
at 140°C;

urea phosphate (4861-19-2) → ammonium metaphosphate + carbon dioxide (124-38-9) + ammonia (7664-41-7) + urea (57-13-6)

Conditions	Yield
byproducts: (NH4)2P2O7; at 100°C; 360 h;

urea phosphate (4861-19-2) → meta-phosphoric acid (10343-62-1)

Conditions	Yield
at 500°C;

urea phosphate (4861-19-2) → diammonium hydrogenphosphate + carbon dioxide (124-38-9)

Conditions	Yield
With H2O In not given Kinetics; 3% soln. of urea phosphate;
With H2O In not given Kinetics; 3% soln. of urea phosphate; at various temp.;
With H2O

Upstream product

• 57-13-6 urea 
• 420-04-2 CYANAMID 

Downstream Products

• 108-80-5 cyanuric acid 
• 108-78-1 2,4,6-triamino-s-triazine 
• 463-77-4 carbamic Acid 
• 7722-76-1 ammonium dihydrogen phosphate 
• 124-38-9 carbon dioxide 
• 7664-41-7 ammonia 
• 57-13-6 urea 
• 10343-62-1 meta-phosphoric acid 

Relevant articles and documents

Process for the preparation of urea phosphate

The invention discloses a preparation method of urea phosphate, which is implemented by taking an industrial phosphoric acid with a weight concentration of over 75% as a raw material through the steps that the raw material is heated to 90-130 DEG C, then the raw material is sprayed to a vacuum reactor at a controlled speed, wherein quantitative urea particles or molten urea are added into the vacuum reactor in advance, and the vacuum reactor has a stirring function; in the vacuum reactor, the urea and the phosphoric acid react so as to generate urea phosphate; in the process of reaction, a vacuum environment is formed in the reactor, and moisture brought by the phosphoric acid is evaporated by using heat emitted in the generation reaction process of the urea phosphate under a vacuum condition, thereby obtaining a dry granular urea phosphate product. By using the method, high-quality urea phosphate products are obtained. The method completely avoids crystallization mother liquor treatment or crystallization solution vacuum-concentration processes in conventional production technologies. The method has the characteristics of high phosphorus/nitrogen yield, short process flow, simple and convenient manipulation, safety, and the like, and industrialization is easy to realize.