pH range8.9 - 10.3 
pKa (25 °C) 9.6
白色晶体粉末。

项目                                  超纯级
纯度assay                             ≥99.5%(T)
水分Moistrue                          ≤1%
铁Iron(Fe)                            <5PPM 
氯Chloride                            ≤0.05%
硫酸根Sulfate                         ≤0.05%
灼烧残渣Residue On Ignition           ≤0.1%
重金属Heavy Metals （as Pb)           <5PPM 
A260(0.5M,water):                     ≤0.05
A280(0.5M,water):                     ≤0.05
项目                                 生化试剂级
                                        BC
纯度assay                             ≥99%(T)
灼烧残渣Residue On Ignition           ≤0.1%
重金属Heavy Metals （as Pb)           <5PPM

生物缓冲剂，用在生化诊断试剂盒、DNA/RNA提取试剂盒及PCR诊断试剂盒里
室温保存