Lactose

Frae Wikipedia
Lowp tae: navigation, rake
Lactose (Milk succar)
Beta-D-Lactose.svg
Names
IUPAC name
β-D-galactopyranosyl-(1→4)-D-glucose
Ither names
Milk succar
4-O-β-D-galactopyranosyl-D-glucose
Identifiers
63-42-3 YesY
ChEBI CHEBI:36218 YesY
ChEMBL ChEMBL417016 N
ChemSpider 5904 YesY
EC-nummer [1]
Jmol-3D images Image
PubChem
UNII J2B2A4N98G YesY
Properties
C12H22O11
Molar mass 342.30 g/mol
Appearance white solid
Density 1.525 g/cm3
Meltin pynt 202.8 °C[1]
Boilin pynt 668.9 °C[1]
21.6 g/100 mL[2]
Thermochemistry
Std enthalpy o
combustion
ΔcHo298
5652 kJ/mol, 1351 kcal/mol, 16.5 kJ/g, 3.94 kcal/g
Hazards
NFPA 704
Flammability code 0: Will nae burn. E.g., watter Health code 1: Exposur would cause irritation but anly minor residual injury. E.g., turpentine Reactivity code 0: Normally stable, even unner fire exposur condeetions, an is nae reactive wi watter. E.g., liquid nitrogen Special hazards (white): no codeNFPA 704 four-colored diamond
Flash pynt {{{value}}}
Except whaur otherwise notit, data are gien for materials in thair staundart state (at 25 °C [77 °F], 100 kPa).
 N verify (whit isYesY/N?)
Infobox references

Lactose is a disaccharide succar derived frae galactose an glucose that is foond in milk. Lactose maks up aroond 2~8% o milk (bi wicht), altho the amoont varies amang species an individuals. It is extractit frae sweet or sour whey. The name comes frae lac or lactis, the Latin wird for milk, plus the -ose endin uised tae name succars. It haes a formula o C12H22O11.

References[eedit | eedit soorce]

  1. 1.0 1.1 1.2 Anonymous. Sigma Aldrich. Lactose Product. http://www.sigmaaldrich.com/catalog/ProductDetail.do?lang=en&N4=17814%7CFLUKA&N5=SEARCH_CONCAT_PNO%7CBRAND_KEY&F=SPEC St. Louis MO.
  2. The solubility of lactose in water is 18.9049 g at 25 °C, 25.1484 g at 40 °C and 37.2149 g at 60 °C per 100 g solution. Its solubility in ethanol is 0.0111 g at 40 °C and 0.0270 g at 60 °C per 100 g solution.Machado, José J. B.; Coutinho, João A.; Macedo, Eugénia A. (2001), "Solid–liquid equilibrium of α-lactose in ethanol/water" (PDF), Fluid Phase Equilibria 173 (1): 121–34, doi:10.1016/S0378-3812(00)00388-5 . ds