Shandong Huashang Chemical Co., Ltd. is a high-tech enterprise focused on industry of fine chemicals research and develop, produce and sale. Shandong Huashang Chemical Co., Ltd. is located in Shan Dong Ji Nan China. we have the ability to provide you high quality products. More than 90 % of our products are exported to developed countries and regions such as north America, Europe, Japan, South Korea and the Middle East.
1. Basic Information
Name: Lactose
Alias: Milk sugar, 4-O-β-D-Galactopyranosyl-D-glucose
CAS No.: 63-42-3
Molecular Formula: C12H22O11
Molecular Weight: 342.30
2. Physical and Chemical Properties
Physical Properties
- Appearance: White crystalline powder or hard crystal granules
- Odor: Odorless, mild sweet taste
- Solubility: Slightly soluble in cold water, easily soluble in hot water; insoluble in ethanol, acetone, ether and non-polar solvents
- Melting Point: Decomposes around 203 °C without distinct melting point
- Specific Rotation: [α]D2? +52.0° ~ +53.0° (aqueous solution)
- Hygroscopicity: Low hygroscopicity under normal humidity; absorbs moisture slowly under high humidity
- Crystal form: Two crystal types: α-lactose monohydrate and anhydrous β-lactose
Chemical Properties
- Molecular structure: Disaccharide composed of D-galactose and D-glucose linked by β-1,4 glycosidic bond
- Reducing sugar characteristic: Contains free aldehyde group, can reduce Fehling reagent to produce brick-red copper oxide precipitate
- Hydrolysis reaction: Hydrolyzed into galactose and glucose under acid heating or lactase catalysis
- Maillard browning: Reacts with amino compounds under heating to form brown flavor substances
- Thermal stability: Stable below 120 °C; caramelization and dehydration occur under long-term high temperature
- Compatibility: Compatible with most food, pharmaceutical and cosmetic raw materials; incompatible with strong alkali and concentrated oxidants
3. Main Application Fields
1. Pharmaceutical Excipient (Core Application)
- Filler, binder and flow aid for oral tablets, capsules and granules, improves molding and disintegration performance
- Diluent for powder injections, stabilizes active pharmaceutical ingredients
- Carrier for probiotic preparations to protect microbial activity
2. Food Industry Raw Material
- Nutritional additive for infant formula milk powder, dairy products and baked food
- Flavor carrier for seasoning, candy and chocolate, enhances creamy aroma
3. Biochemical Culture Medium
Carbon source for microbial strain fermentation, culture medium raw material for bacteria and yeast cultivation
4. Cosmetic Auxiliary Material
Moisturizing carrier in facial mask and cream, mild exfoliating auxiliary ingredient
4. Quality Specification Table
| Test Item | Standard Index |
| CAS Number | 63-42-3 |
| Molecular Formula | C12H22O11 |
| Molecular Weight | 342.30 |
| Appearance | White crystalline powder |
| HPLC Purity | Pharma/Food Grade ≥99.0% |
| Loss on Drying | ≤0.50% |
| Residue on Ignition | ≤0.10% |
| Heavy Metals (Pb) | ≤10 ppm |
| Arsenic (As) | ≤2 ppm |
| Packaging | 25kg PE lined woven bag / fiber drum |
| Storage Condition | Hermetic dry warehouse below 25 °C; avoid damp environment and peculiar smell pollution |
| Transportation Requirement | Food & pharmaceutical excipient solid, dust-proof sealed packaging |
| Shelf Life | 36 months under intact sealed packaging |
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