Lactose monohydrate, for molecular biology, 1 kg, plastic

Lactose monohydrate is a disaccharide hydrate supplied for molecular biology, with empirical formula C₁₂H₂₂O₁₁ · H₂O, molar mass 360,32 g/mol and density 1,525 g/cm³. Identified by CAS number 10039-26-6 and EG nr. 200-559-2, this carbohydrate is used in biochemical workflows that call for a defined lactose source, including media formulation, enzyme studies and other molecular-biology applications involving disaccharides. The monohydrate form provides a stable solid for weighing and solution preparation in research and quality-control laboratories. Physical data for molar mass and density support accurate stock solutions and documentation. As a classic reducing disaccharide hydrate, lactose monohydrate remains a standard reagent across biochemical and molecular-biology benches where consistent identity and grade for molecular biology are required. The product profile is limited to the stated analytical identifiers and physical constants.

This article is part of Pharmacopoeia reagents & excipients.

Key features

• Appearance: white to almost white powder
• Heavy metals: ≤0.0005 %
• Specific rotation [α]20D: +54.4° to +55.9°
• Loss on drying: ≤0.5 %
• Sulphated ash: ≤0.1 %
• Water: 4.5-5.5 %
• 400 nm: ≤0.04
• 210-220 nm: ≤0.25
• 270-300 nm: ≤0.07
• CAS number: 10039-26-6
• Pack sizes: 1 kg, 5 kg, 50 kg, 10 kg
• EG nr.: 200-559-2
• Empirical formula: C₁₂H₂₂O₁₁ · H₂O
• Molar mass: 360,32 g/mol
• Density: 1,525 g/cm³
• Technical Information Sheet:
• Safety Data Sheet: