.beta.-D-갈락토피라노스

.beta.-D-갈락토피라노스
.beta.-D-갈락토피라노스 구조식 이미지
카스 번호:
7296-64-2
한글명:
.beta.-D-갈락토피라노스
동의어(한글):
.beta.-D-갈락토피라노스
상품명:
.beta.-D-Galactopyranose
동의어(영문):
β-D-Galactose;-β-D-Galactose;β-D-galactopyranose;.beta.-D-Galactopyranose;(2R,3R,4S,5S,6R)-6-(hydroxymethyl)oxane-2,3,4,5-tetrol;(2R,3R,4S,5R,6R)-6-(hydroxymethyl)tetrahydro-2H-pyran-2,3,4,5-tetraol
CBNumber:
CB31208989
분자식:
C6H12O6
포뮬러 무게:
180.16
MOL 파일:
7296-64-2.mol

.beta.-D-갈락토피라노스 속성

녹는점
179-179.5 °C
끓는 점
410.8±45.0 °C(Predicted)
밀도
1.732±0.06 g/cm3(Predicted)
저장 조건
Hygroscopic, Refrigerator, under inert atmosphere
용해도
물(약간 용해됨)
물리적 상태
고체
물리적 상태
단단한 모양
산도 계수 (pKa)
12.12±0.70(Predicted)
색상
흰색에서 황백색까지
안정성
흡습성

안전

.beta.-D-갈락토피라노스 C화학적 특성, 용도, 생산

용도

β-D-Galactose s the beta anomer of D-Galactose (G155250), the C-4 epimer of Glucose (G595000). D-Galactose is found in milk and sugar beets as well as being synthesized by the body.

정의

ChEBI: A D-galactopyranose having beta-configuration at the anomeric centre.

Purification Methods

D-Galactose (40g) is dissolved in hot H2O to establish the equilibrium of and anomers; then the solution is cooled to 0o and poured into absolute EtOH (500mL). Stir vigorously and crystallisation occurs within a few minutes, and more rapidly if seeded, filter the crystals immediately (7g, [] D 20 +65o (initial, c 4 in H2O). This mixture of and anomers is further separated by dissolving in an equal weight of cold H2O, filtering and adding to ice cold absolute EtOH (250mL) and stirring for 1minute when crystals separate, then filter them off. After two such crystallisations, the initial [] D 20 is +53o. This can be further purified by shaking with 80% EtOH for 2minutes, filtering, washing with EtOH and Et2O, and drying in a vacuum desiccator to give -Dgalactose (15g) with m 167o, [ ] D 20 +52o (initial, c 4 in H2O) mutarotating to +80.4o. Acetylation of Dgalactose with hot NaOAc/Ac2O gives -D-galactopyranoside pentaacetate m 1 4 2o, [ ] D 25 +25 (c 4 in CHCl3). [Wolfrom & Thompson Methods in Carbohydrate Chemistry I 120 1962, Academic Press, Beilstein 1 IV 4336.]

.beta.-D-갈락토피라노스 준비 용품 및 원자재

원자재

준비 용품


.beta.-D-갈락토피라노스 공급 업체

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