Maltose

Maltose

α-Maltose
β-Maltose
Names
IUPAC name 2-(hydroxymethyl)-6-[4,5,6-trihydroxy-2-(hydroxymethyl)oxan-3-yl]oxyox ane-3,4,5-triol
Other names 4-O-α-D-Glucopyranosyl-D-glucose
Identifiers
CAS Number	69-79-4 Y
3D model (Jmol)	Interactive image
ChEBI	CHEBI:17306 Y
ChEMBL	ChEMBL1234209 N
ChemSpider	388329 α-maltose Y 6019 β-maltose Y
ECHA InfoCard	100.000.651
EC Number	200-716-5
PubChem	6255
UNII	66Y63L379N Y
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 Y Key: GUBGYTABKSRVRQ-PICCSMPSSA-N Y 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 Key: GUBGYTABKSRVRQ-PICCSMPSSA-N
SMILES O([C@H]1[C@H](O)[C@@H](O)C(O)O[C@@H]1CO)[C@H]2O[C@@H]([C@@H](O)[C@H](O)[C@H]2O)CO
Properties
Chemical formula	C12H22O11
Molar mass	342.30 g·mol−1
Appearance	White powder or crystals
Density	1.54 g/cm3
Melting point	160 to 165 °C (320 to 329 °F; 433 to 438 K) (anhydrous) 102–103 °C (monohydrate)
Solubility in water	1.080 g/mL (20 °C)
Chiral rotation ([α]D)	+140.7° (H2O, c = 10)
Hazards
Safety data sheet	External MSDS
Related compounds
Related	Sucrose Lactose Trehalose Cellobiose
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
N  (what is YN ?)
Infobox references

Maltose (/ˈmɔːltoʊs/ or /ˈmɔːltoʊz/), also known as maltobiose or malt sugar, is a disaccharide formed from two units of glucose joined with an α(1→4) bond, formed from a condensation reaction. The isomer isomaltose has two glucose molecules linked through an α(1→6) bond.

Maltose is the second member of an important biochemical series of glucose chains. Maltose is the disaccharide produced when amylase breaks down starch. It is found in germinating seeds as they break down their starch stores to use for food, which is why it was named after malt. It is also produced when glucose is caramelized.

Maltose was discovered by Irish chemist and brewer Cornelius O'Sullivan in 1872. Its name comes from malt, from Old English mealt, of Germanic origin, and the suffix '–ose', a suffix denoting names of sugars and other carbohydrates.

Maltose is a biomolecule that belongs to the group of carbohydrates within the division of biomolecules into the three main groups: carbohydrates, lipids and proteins. Carbohydrates are composed of carbon, oxygen and hydrogen C, O, H and are either polyhydroxyaldehydes or polyhydroxyketones.