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Merck
CN

61339

D-乳糖 一水合物

≥99% (HPLC), BioUltra

别名:

β-D-Gal-(1→4)-D-Glc, 4-O-β-D-吡喃半乳糖基-D-葡萄糖, 乳糖

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关于此项目

经验公式(希尔记法):
C12H22O11 · H2O
化学文摘社编号:
分子量:
360.31
UNSPSC Code:
12352201
NACRES:
NA.25
PubChem Substance ID:
EC Number:
200-559-2
Beilstein/REAXYS Number:
3768231
MDL number:
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产品名称

D-乳糖 一水合物, ≥99% (HPLC), BioUltra

InChI key

HBDJFVFTHLOSDW-XBLONOLSSA-N

InChI

1S/C12H22O11.H2O/c13-1-4(16)7(18)11(5(17)2-14)23-12-10(21)9(20)8(19)6(3-15)22-12;/h1,4-12,14-21H,2-3H2;1H2/t4-,5+,6+,7+,8-,9-,10+,11+,12-;/m0./s1

SMILES string

O.OC[C@@H](O)[C@@H](O[C@@H]1O[C@H](CO)[C@H](O)[C@H](O)[C@H]1O)[C@H](O)[C@@H](O)C=O

product line

BioUltra

assay

≥99% (HPLC)

form

solid

optical activity

[α]20/D +53±1°, 22 hr, c = 10% in H2O

impurities

insoluble matter, passes filter test

ign. residue

≤0.05% (as SO4)

color

colorless

pH

3.5-6.0 (25 °C, 0.5 M in H2O)

solubility

H2O: 0.5 M at 20 °C, clear, colorless

anion traces

chloride (Cl-): ≤50 mg/kg
sulfate (SO42-): ≤50 mg/kg

cation traces

Al: ≤5 mg/kg
As: ≤0.1 mg/kg
Ba: ≤5 mg/kg
Bi: ≤5 mg/kg
Ca: ≤10 mg/kg
Cd: ≤5 mg/kg
Co: ≤5 mg/kg
Cr: ≤5 mg/kg
Cu: ≤5 mg/kg
Fe: ≤5 mg/kg
K: ≤50 mg/kg
Li: ≤5 mg/kg
Mg: ≤5 mg/kg
Mn: ≤5 mg/kg
Mo: ≤5 mg/kg
Na: ≤50 mg/kg
Ni: ≤5 mg/kg
Pb: ≤5 mg/kg
Sr: ≤5 mg/kg
Zn: ≤5 mg/kg

λ

0.5 M in H2O

UV absorption

λ: 260 nm Amax: 0.02
λ: 280 nm Amax: 0.02

Quality Level

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Application

D-乳糖是一种由 D-葡萄糖和 D-半乳糖组成的双糖,是牛奶中的主要糖类。D-乳糖可用于乳酸代谢细菌、乳酸菌的培养。也用于鉴别和表征半乳糖凝集素。

Biochem/physiol Actions

乳糖是一种由一个半乳糖和一个葡萄糖分子缩合而成的物质。乳糖是大多数种类牛奶中的主要糖,通常含量在2-8%之间。乳糖酶将乳糖水解成其组成单糖。在新生儿中,通过乳糖酶作用释放的葡萄糖是主要的能量来源。

Other Notes

为了全面了解我们针对客户研究提供的各种二糖产品,建议您访问我们的碳水化合物分类页面。
硝基二甲苯与二甲苯酚异构体 GLC 分离中液相固定相的组分
销售限制可能适用

存储类别

11 - Combustible Solids

wgk

WGK 3

flash_point_f

Not applicable

flash_point_c

Not applicable

ppe

Eyeshields, Gloves, type N95 (US)


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