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α-Lactose monohydrate, 1 kg

Ph. Eur., for biochemistry
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Milk sugar, Lactobiose
Empirical formula C12H22O11 · H2O
Molar mass (M) 360,32 g/mol
Density (D) 1,525 g/cm³
Melting point (mp) 202 °C
CAS No. 10039-26-6
EG-Nr. 200-559-2

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Art. No. 8921.1

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α-Lactose monohydrate Ph. Eur., for biochemistry

Technical Information
Checked according to pharmacopoeia Ph. Eur. 
α-Lactose monohydrate
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8921.1 1 kg plastic


8921.2 5 kg plastic


8921.3 10 kg plastic


8921.5 25 kg plastic


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General information

Sugar (Carbohydrates)

Carbohydrates or Saccharides make up 50 % of the dry biomass of the earth and are therefore the most frequent class of biomolecules. Besides at least two hydroxy groups, they also have an aldehyde or a ketone group and can be subdivided according to the number of monomeric components in mono-, di-, oligo and polysaccharides.

Whereas mono-, di- and oligosaccharides are soluble in water, taste sweet and are therefore called as sugar, polysaccharides are hardly, or not at all, soluble in water and have a neutral taste.

Carbohydrates, together with fats and proteins make up a large percentage of nutrition. In addition to their central role as an energy source, they are also an important structural component especially in plants (e.g. Cellulose). Ribose, a monosaccaride with five carbons (C5H10O5) is an essential element of coenzymes (such as ATP, FAD and NAD) and a structural component of RNA. Desoxyribose (a ribose derivative) is a structural component of DNA.


Disaccharides consist of two monosaccharide units. These are interlinked covalently via a glycocide bond. The most familiar representatives are saccharose, lactose and maltose.

Certificates of Analysis

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The following analysis certificates have been found:

Guarantee analysis

Appearancewhite or almost white, crystalline odourless powder
Appearance of solutioncomplies
Acid or alkaline react. substancescomplies
Specific rotation [α]20D (dry substance)+ 54.4° to + 55.9°
Water4.5-5.5 %
Loss on drying≤0.5 %
Sulphated ash≤0.1 %
Heavy metals≤0.0005 %
Microbiological impuritiescomplies
400 nm≤0.04
210-220 nm≤0.25
270-300 nm≤0.07