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 Products
Urea
CAS No.:57-13-6 EINECS.:200-315-5
MDL:-MFCD00008022 Beilstein:635724
Chemical Formula:H2NCONH2 Molecular weight: 60.06
Synonyms: Carbamide;
Properties: 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 |
Grade (for molecular biology, ≥99.5%, powder)
appearance white powder
solubility clear colorless solution at 1g plus 10ml of water
lead by ICP-atomic emission ≤ 5 ppm
iron by ICP-atomic emission ≤ 1 ppm
copper by ICP-atomic emission ≤ 1 ppm
chloride content ≤ 5 ppm
cyanate content ≤ 10 ppm
DNA ses, none detected
RN ases, none detected
proteases, none detected
nickase,endonuclease detection none detected
Purity ≥99.5% (T)
Packing:It is packed with polythene bag as the inner layer, and a compound plastic woven bag as the outer layer. The net weight of each bag is 25kg.
Storage and Transport:It should be stored in a dry and ventilative warehouse; kept away form water and moisture during transport; unloaded with care, so as to avoid damage to bags. Furthermore, it should be stored separately from poisonous substances.
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