Lactose

C₁₂H₂₂O₁₁

IUPAC: 4-O-beta-D-Galactopyranosyl-D-glucose

CAS: 63-42-3

Overview

Lactose is the primary sugar in milk, composed of glucose and galactose. About 65% of the global population has reduced ability to digest lactose after infancy.

Composition

Element	Symbol	Atoms	Atomic Mass
Hydrogen	H	22	1.0080
Carbon	C	12	12.0110
Oxygen	O	11	15.9990

Elemental Composition

Hydrogen ×22

6.5%

Carbon ×12

42.1%

Oxygen ×11

51.4%

Uses

• Pharmaceutical excipient
• Food industry
• Baby formula
• Confectionery

Fun Facts

✦ Lactose intolerance is the norm for most of the world's adult population

Structure

SMILES

C(C1C(C(C(C(O1)OC2C(OC(C(C2O)O)O)CO)O)O)O)O

Properties

Type: organic
State: solid
Molar Mass: 342.30 g/mol
Density: 1.5250 g/cm³
Melting Point: 202.8 °C
Solubility: 195 g/L at 25°C

Molecular Descriptors

Exact Mass: 342.1162
XLogP: -4.7
TPSA: 190.0 Å²
H-Bond Donors: 8
H-Bond Acceptors: 11
Rotatable Bonds: 4
Heavy Atoms: 23
Complexity: 382.0

Related Compounds

1,2-Dichloroethane

C₂H₄Cl₂

1,3-Butadiene

C₄H₆

1,4-Dioxane

C₄H₈O₂

1-Butanol

C₄H₁₀O

2-Propanol

C₃H₈O

Acetaldehyde

CH₃CHO

Acetamide

C₂H₅NO

Acetic Anhydride

C₄H₆O₃

Acetone

(CH₃)₂CO

Acetonitrile

C₂H₃N

Frequently Asked Questions

What is Lactose?

Lactose (C₁₂H₂₂O₁₁) is a organic compound with the IUPAC name 4-O-beta-D-Galactopyranosyl-D-glucose.

What is the molecular weight of Lactose?

Lactose has a molar mass of 342.3 g/mol.

What state is Lactose at room temperature?

Lactose is a solid at room temperature.

Is Lactose organic or inorganic?

Lactose is classified as an organic compound.

What elements make up Lactose?

Lactose (C₁₂H₂₂O₁₁) is composed of Hydrogen (H), Carbon (C), Oxygen (O).