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Merck

61339

Sigma-Aldrich

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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About This Item

经验公式(希尔记法):
C12H22O11 · H2O
CAS号:
分子量:
360.31
Beilstein:
3768231
EC號碼:
MDL號碼:
分類程式碼代碼:
12352201
PubChem物質ID:
NACRES:
NA.25

產品線

BioUltra

品質等級

化驗

≥99% (HPLC)

形狀

solid

光學活性

[α]20/D +53±1°, 22 hr, c = 10% in H2O

雜質

insoluble matter, passes filter test

燃燒殘留物

≤0.05% (as SO4)

顏色

colorless

pH值

3.5-6.0 (25 °C, 0.5 M in H2O)

溶解度

H2O: 0.5 M at 20 °C, clear, colorless

負離子痕跡

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

正離子痕跡

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

&lambda ;

0.5 M in H2O

紫外吸收

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

SMILES 字串

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

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

InChI 密鑰

HBDJFVFTHLOSDW-XBLONOLSSA-N

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應用

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。

生化/生理作用

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。

其他說明

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

儲存類別代碼

11 - Combustible Solids

水污染物質分類(WGK)

WGK 3

閃點(°F)

Not applicable

閃點(°C)

Not applicable

個人防護裝備

Eyeshields, Gloves, type N95 (US)


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