D(+)-乳糖，一水|64044-51-5|一水乳糖|艾科试剂

货号	品名	产品规格	包装	单价(RMB)	可用库存	备注
126896	D(+)-乳糖，一水	Ultra Pure,≥99.5% (HPLC)	25g	395.00	>10	J-K
126895	D(+)-乳糖，一水	Ultra Pure,≥99.5% (HPLC)	100g	1395.00	>10	J-K
126894	D(+)-乳糖，一水	98%	250g	108.00	>10

性状
质量标准

品级Grade                                 超纯级
                                     (Ultra Pure,≥99.5% (HPLC))
纯度Purity                                ≥99.5% (HPLC)
比旋光度Specific rotation [a]20/D [α]20/D +53±1°, 22 hr, c = 10% in H2O
insoluble matter,                         passes filter test
Residue on ignition                       ≤0.05% (as SO4)
pH                                        3.5-6.0 (25 °C, 0.5 M in H2O)
solubility H2O:                           soluble0.5 M at 20 °C, clear, colorless
anion traces
  chloride (Cl-):                         ≤50 ppm
  sulfate (SO42-):                        ≤50 ppm
cation traces
  Al:                                     ≤5 ppm
  As:                                     ≤0.1 ppm
  Ba:                                     ≤5 ppm
  Bi:                                     ≤5 ppm
  Ca:                                     ≤10 ppm
  Cd:                                     ≤5 ppm
  Co:                                     ≤5 ppm
  Cr:                                     ≤5 ppm
  Cu:                                     ≤5 ppm
  Fe:                                     ≤5 ppm
  K:                                      ≤50 ppm
  Li:                                     ≤5 ppm
  Mg:                                     ≤5 ppm
  Mn:                                     ≤5 ppm
  Mo:                                     ≤5 ppm
  Na:                                     ≤50 ppm
  Ni:                                     ≤5 ppm
  Pb:                                     ≤5 ppm
  Sr:                                     ≤5 ppm
  Zn:                                     ≤5 ppm
λ 0.5 M in H2O
UV absorption
  λ: 260 nm A:                            ≤0.02
  λ: 280 nm A:                            ≤0.02

98%:

外观Appearance                            White Powder
Infrared spectrum                          Conforms to Structure
纯度Purity                                ≥98.0% (HPLC)
比旋光度Specific rotation [α]20/D         +50～+53°, 22 hr, c = 4.5 in H2O
水分Water (by Karl Fischer)               4.0- 6.0 %
灼烧残渣Residue on ignition (Ash)         ≤0.03%
不溶物Insoluble matter                    ≤0.005%
葡萄糖Dextrose                            passes test
铁Iron (Fe)                               ≤5 ppm
重金属Heavy Metal (As Pb)                 ≤5 ppm