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Molecular formula :

nature : for the comparative analysis, composition can determine an accurate measurement of pure substances. General metal, oxides, such as nitrates, inorganic acid-soluble, stable, accurate weighing) 7 spectrum pure reagents. There are two kinds of liquid and solid form.

Notice:Each item can have many explanations from different angels. If you want grasp the item comprehensively,please see below "more details data".
Please see below "More Detailed Data"
More Detailed Data:
1) mixed standard
2) analysis standard
3) standard tape;reference tape
4) standard gold
5) standard sieve
6) wavelength standard
7) isotope standard
8) standard rim
9) environmental standard
10) standard cell
Notice Some description was translated by software and the data is only as a reference.
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