Alpha-lactose monohydrate
CAS 5989-81-1
EC 611-913-4
Formula C12H22O11.H2O
MW 360.31 g/mol
Sweeteners & Food Additives Pharmaceuticals & HealthcarePersonal Care & CosmeticsFood & Nutrition Humectant & MoisturizingChelation & Sequestration
Description
Alpha-Lactose Monohydrate (CAS 5989-81-1) is a natural disaccharide sugar derived from milk whey, commercially available under trade names including GranuLac 200, Pharmatose 325, Pharmatose 90M, and Zeparox. It carries no E-number designation and is registered under EC 611-913-4 with molecular formula C12H22O11.H2O.
In pharmaceutical tableting, it functions as a dry binder and diluent, providing compressibility and flow characteristics that support direct compression processes. In personal care formulations, it acts as a humectant by attracting and retaining moisture at the skin surface, and as a chelator by binding trace metal ions that would otherwise destabilize emulsions or active ingredients.
Alpha-Lactose Monohydrate is sourced in food-grade and pharmaceutical-grade forms compliant with Ph.Eur., USP/NF, and FCC monographs. It falls under REACH registration and is classified under HS code 17021100. Typical supply formats include 25 kg bags and bulk quantities depending on grade specification.
In pharmaceutical tableting, it functions as a dry binder and diluent, providing compressibility and flow characteristics that support direct compression processes. In personal care formulations, it acts as a humectant by attracting and retaining moisture at the skin surface, and as a chelator by binding trace metal ions that would otherwise destabilize emulsions or active ingredients.
Alpha-Lactose Monohydrate is sourced in food-grade and pharmaceutical-grade forms compliant with Ph.Eur., USP/NF, and FCC monographs. It falls under REACH registration and is classified under HS code 17021100. Typical supply formats include 25 kg bags and bulk quantities depending on grade specification.
Physical Properties
| Melting Point | 218.95 °C |
| Boiling Point | 412.35°C (rough estimate) |
| Density | 1.529 g/cm³ (solid) (amorphous) |
| Appearance | White powder |
| Color | White to Off-White |
| Form | neat |
| Water Solubility | Soluble in water. |
| Refractive Index | 1.6480 (estimate) |
| pH | pH (50g/l, 25℃) : 4.0～6.0 |
Trade & Regulatory
| HS Code | 17021100 |
| WGK (Germany) | 3 |
Other Names
Pharmatose 325Pharmatose 90MLactose MonohydrateZeparoxA-LACTOSEA-LACTOBIOSEGranuLac 200Pharmatose 50M
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