CNW RBS NA2酸性中和助剂，含磷酸，配套机洗型碱性清洗剂4.300016.5000 A155使用

4.120167
Tris (Hydroxymethyl) Aminomethane
primary standard, ACS-ISO
NH2C(CH2OH)3        M.= 121.14
CAS No.             77-86-1   


Assay (Perchl. Ac.) (after drying at 105°C)      99.95 ~ 100.05%
Identity (IR)                                     passes test
pH (sol. 0.05 mol/l)                              10.2 ~ 10.6
MAXIMUM LIMIT OF IMPURITIES 
ABS (at λ 290 nm 40% sol. in water)               0.2
Insoluble matter in H2O                           0.005%
Residue on ignition (as SO4)                      0.01%
Chloride (Cl)                                     0.0005%
Heavy metals (as Pb)                              0.0005%

As       0.00005%       Cu         0.0002%       Na       0.001%
Ca       0.001%         Fe         0.0005%       Ni       0.0005%
Cd       0.0001%        K          0.001%        Pb       0.0002%
Co       0.0001%        Mg         0.001%        Zn       0.0002%
Cr       0.0001%