| 分子式 | |
| 其他事项 | 4.120158Tris(hydroxymethyl)aminomethaneBiochemical grade, for analysis(HOCH2)3CNH2 M.= 121.14CAS No. 77-86-1Assay (Total base, on dry substance) ≥ 99.75% Infrared spectrometry authentic Water (KF) ≤ 0.5% Sulfated ash ≤ 0.1%pH (5% in H2O) 10.0~11.5 Heavy metals ≤ 5 ppmChloride(Cl) ≤ 5 ppmLead (Pb) ≤ 5 ppmIron (Fe) ≤ 1 ppmUV absorption (10% aq. soln.) (1 cm cell)λ 260 nm max 0.1λ 280 nm max 0.1UV absorption (40% aq. soln.) (1 cm cell)λ 290 nm max 0.2 |
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