69-79-4, D-(+)-麦芽糖单水合物, D-(+)-Maltose monohydrate, CAS:69-79-4

69-79-4, D-(+)-Maltose monohydrate,
CAS:69-79-4
C12H22O11 · H2O / 360.31
MFCD00149343

D-(+)-麦芽糖单水合物,D-Maltose monohydrate

Maltose is a glycosylglucose consisting of two D-glucopyranose units connected by an alpha-(1->4)-linkage. It has a role as a sweetening agent, a human metabolite, a Saccharomyces cerevisiae metabolite, an Escherichia coli metabolite and a mouse metabolite. It is a glycosylglucose and a maltooligosaccharide.

A dextrodisaccharide from malt and starch. It is used as a sweetening agent and fermentable intermediate in brewing. (Grant and Hackh's Chemical Dictionary, 5th ed)

Title: Maltose

CAS Registry Number: 69-79-4

CAS Name: 4-O-a-D-Glucopyranosyl-D-glucose

Additional Names: malt sugar; maltobiose; 4-(a-D-glucosido)-D-glucose

Trademarks: Maltos (Otsuka); Martos-10 (Otsuka)

Molecular Formula: C12H22O11

Molecular Weight: 342.30

Percent Composition: C 42.11%, H 6.48%, O 51.41%

Literature References: Monohydrate obtained in about 80% yield by enzymatic (diastase) degradation of starch: Gore, US 1657079 (1928). Structure: Haworth, Peat, J. Chem. Soc. 1926, 3094; Hassid, Ballou in W. Pigman, The Carbohydrates (Academic Press, New York, 1957) p 498. Crystal and molecular structure: F. Takusagawa, R. A. Jacobson, Acta Crystallogr. B34, 213 (1978). Review: E. Tarelli, Dev. Food Carbohydr. 2, 187-227 (1980); R. Khan, Carbohydr. Chem. Biochem. 39, 213-278 (1981).

Derivative Type: Monohydrate

Properties: Crystals from water or dil alc, mp 102-103°. Does not lose its water of crystn by drying at room temp in vacuo over H2SO4 or P2O5. About one-third as sweet as sucrose. Cf. Isbell, Pigman, J. Res. Natl. Bur. Stand. 18, 141 (1937). Shows mutarotation. [a]D20 +111.7° ® +130.4° (c = 4). pKa (21°): 12.05. Sol in water, slightly sol in alcohol. Practically insol in ether.

Melting point: mp 102-103°

pKa: pKa (21°): 12.05

Optical Rotation: [a]D20 +111.7° ® +130.4° (c = 4)

Use: Nutrient, sweetener, in culture media, in prepd bee food. Parenteral supplement of sugar for diabetics. Fermentable intermediate in brewing. Stabilizer for polysulfides. In pharmaceutical dispensing.

CAS Number	69-79-4
Product Name	beta-Maltose
IUPAC Name	(2R,3S,4S,5R,6R)-2-(hydroxymethyl)-6-[(2R,3S,4R,5R,6R)-4,5,6-trihydroxy-2-(hydroxymethyl)oxan-3-yl]oxyoxane-3,4,5-triol
Molecular Formula	C12H22O11
Molecular Weight	342.31 g/mol
InChI	InChI=1S/C12H22O11/c13-1-3-5(15)6(16)9(19)12(22-3)23-10-4(2-14)21-11(20)8(18)7(10)17/h3-20H,1-2H2/t3-,4-,5-,6+,7-,8-,9-,10-,11-,12-/m1/s1
InChI Key	GUBGYTABKSRVRQ-PICCSMPSSA-N
SMILES	C(C1C(C(C(C(O1)OC2C(OC(C(C2O)O)O)CO)O)O)O)O
Solubility	780000 mg/L (at 20 °C)
Synonyms	Maltose
Canonical SMILES	C(C1C(C(C(C(O1)OC2C(OC(C(C2O)O)O)CO)O)O)O)O
Isomeric SMILES	C([C@@H]1[C@H]([C@@H]([C@H]([C@H](O1)O[C@@H]2[C@H](OC([C@@H]([C@H]2O)O)O)CO)O)O)O)O

CAS No: 6363-53-7,69-79-4 Synonyms: 4-O-a-D-Glucopyranosyl-D-glucopyranose monohydrateMaltose MDL No: MFCD00149343 Chemical Formula: C12H22O11·H2O Molecular Weight: 360.31

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Name: D-(+)-Maltose monohydrate CAS: 6363-53-7,69-79-4

M.F.: C₁₂H₂₂O₁₁ · H₂O M.W.: 360.31 Batch No: 20121211 Quantity: 350kg

*Items*	*Standards*	*Results*
Appearance	white powder	Complies
Solubility	Easily soluble in water. Clear and colorless solution	Complies
MS and NMR	Should comply	Complies
Specific rotation (C =4 inwater plus ammonium hydroxide at 20 degree)	+128° ~ +132°	+130.6°
Water	4% ~ 6%	4.7%
Glucose	Max. 1%	0.12%
Maltotriose	Max.1%	0.45%
Assay	Min. 98%	99.3%