α-Lactose monohydrate CAS 5989-81-1, also known as milk sugar, is a natural disaccharide extracted from whey. It appears as white crystalline powder with mild sweet taste, good flowability and stable crystal form. Widely applied in pharmaceutical USP, food and nutritional industries as filler, excipient and sweetener. TNJ Chemical is the leading manufacturer and exporter since from 2001. We guarantee high quality, competitive price, stable supply, fast delivery and tech support etc. To find more, please contact sales@tnjchem.com
Product Information
Common Name: α-Lactose Monohydrate
CAS No.: 5989-81-1
Molecular Formula: C₁₂H₂₂O₁₁·H₂O
Molecular Weight: 360.31
Synonyms: Lactose monohydrate, 4-O-β-D-galactopyranosyl-α-D-glucose monohydrate
Chemphysical Properties
Appearance White crystalline powder
Melting Point ~202℃ (decompose)
Specific Rotation [α]D²⁰ +52.0° ~ +52.6°
Solubility Soluble in water, slightly soluble in ethanol, insoluble in ether
Bulk Density 0.55 ~ 0.75 g/mlHygroscopicity Low hygroscopicity under normal condition
Quality Specification
| Item | USP Grade | Food Grade |
|---|---|---|
| Assay (anhydrous basis), % | 98.5~101.5 | ≥99.0 |
| Water content, % | 4.5~5.5 | 4.5~5.5 |
| Heavy metals (Pb), ppm | ≤10 | ≤10 |
| Loss on drying, % | 4.5~5.5 | 4.5~5.5 |
| Residue on ignition, % | ≤0.1 | ≤0.1 |
| Particle size | Custom mesh available | Custom mesh available |
Use & Application
USP grade α-Lactose monohydrate is the most common tablet and capsule excipient in pharmaceutical formulation. It works as diluent, binder and filler to improve powder flow and help tablet forming. It can also be used for dry powder inhalation formulations and drug carrier systems.
Food grade α-Lactose monohydrate serves as mild sweetener, anti-caking agent and texture modifier in baked goods, infant formula, confectionery and dairy seasonings. It helps stabilize aroma and extends shelf life of food products. It is also widely used in microbiology culture media and nutritional supplement raw materials.
Packing
25kg paper bag with PE inner liner. Customized packing available upon request.
Delivery & Storage
Store in cool, dry and well-ventilated warehouse, sealed container, protect from moisture. Avoid direct sunlight and high humidity environment. Shelf life is 24 months under proper storage. Transport as ordinary non-hazardous goods.
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