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Urea

Urea
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FOB Price: Negotiable 
Product Type: reagent 
Port: Any Chinese Ports  
Minimum Order Quantity: 1000 KG 
Supply Ability:
Place Of Origin: China
Delivery Time: 3 days
Expiry Date: long-term effectiveness
Last Update: 2013-07-29
Views: 90
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Product Details
 

Synonyms: Urea occurs  as a colorless to white,prismatic,crystalline powder or as small,white pellets.It is commonly produced from CO2 by ammonolysis of from cyanamide by hydrolysis,It is freely soluble in water and in boiling alcohol.but practically insoluble in chloroform and in ether.It melts at range of 132 to135°C
Main applications: medical applications , agricultural applications , business applications , laboratory applications , feed additives , cosmetics , industrial applications.
Quality standard
Item Analytical reagent FCC(5th)
 E927b
   Pharmacopoeia Grade
 
 (AR)     

  (Ph. Eur., BP, USP)

Assay(H2NCONH2),%                  ≥ 99.0 

  99.0-100.5

  99.0 (dried substance)

Clarty   complies  

  complies

 Insoluble matter in water,%          ≤  0.005    
 Ignition residue(SO4),%                ≤  0.01 

 0.1

  0.005

Chloride(Cl),%                                ≤ 0.0003  

 0.007

  0.001

Sulfate(SO4),%                              ≤ 0.001

 0.01

  0.01

Ammonia(NH3),%                           ≤ 0.005    

  0.05

Iron(Fe),%                                      ≤ 0.0002      
Heavy metals(as Pb),%                 ≤ 0.0002    

  0.001

Biuret(C2H5N3O2),%                     ≤ 0.2   

 0.1

Ammonium (NH4) %                       ≤    

  0.05

Alkali reaction material    

  complies

Residual solvents,    

  complies

Insoluble in ethanol  %                    ≤  

0.04

  0.04

loss on drying(105 °C, 1 h), %       ≤  

1.0

  1.0

Melting point    

  132-135 °C

Arsenic(As)  

3mg/kg

 
Lead(Pb),                                       ≤  

5mg/kg

 

ACS Grade                                     (ACS, ≥99.5% (T))

Items Standard Unit Method
Purity(GC)    ≥99.5(T)  %  
formaldehyde (HCHO)   ≤0.005 %  
biuret    ≤0.1 %  
Residue on ignition(as SO4)  ≤0.01 %  
Melting point  132-135 °C    
chloride (Cl-)  ≤5 ppm anion traces by ICP Atomic emission
sulfate (SO42-)  ≤10 ppm  
Calcium(Ca)  ≤10 ppm cation traces by ICP Atomic emission
Cadmium(Cd)  ≤5 ppm  
Cobalt(Co)  ≤5 ppm  
Chromium(Cr)  ≤5 ppm  
Copper(Cu)  ≤5 ppm  
Iron(Fe)  ≤5 ppm  
Potassium(K)  ≤50 ppm  
Magnesium(Mg)  ≤5 ppm  
Manganese(Mn)  ≤5 ppm  
Sodium(Na)  ≤50    
Nickel(Ni)  ≤5 ppm  
Lead(Pb)  ≤5 ppm  
Zinc(Zn)  ≤5 ppm  
Appearance      White Powder
Infrared spectrometry     Conforms to Structure
 
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