Molekula
D-Lactose monohydrate
Supplying 4,500+ customers in over 80 countries
ISO 9001:2015 & ISO 14001:2015 certified · Supplying laboratories and industry since 2000 · Listed pack sizes are a starting point — we manufacture, source and repack to the quantity you need
D-Lactose monohydrate is a crystalline disaccharide used as a filler, binder, and stabilizer in pharmaceutical formulations and as a nutrient in cell culture media. It has a CAS number of 64044-51-5, molecular formula C12H22O11 · H2O, and a molecular weight of 360.32 g/mol. It is stable at ambient storage conditions and carries no signal word. Molekula supplies D-Lactose monohydrate from research to bulk quantities with full documentation and ISO 9001:2015 traceability.
Example image for illustration only. Other packaging and pack sizes are available.
Pricing & pack sizes
Pack sizes & pricing
Pricing on request — packs available from research to bulk quantities.
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Tell us how much you need and when — drums, IBCs, sacks or a one-off bulk lot. We'll manufacture or source it and come back with a price.
Prices exclude VAT/sales tax and shipping.
Specifications
| Property | Value |
|---|---|
| Appearance | White, crystalline powder |
| Grade | BP2009 |
| Water | 4.5% to 5.5% |
| Specific rotation | +54.4° to +55.9° |
| Heavy metals | ≤ 5ppm |
| Identification | The infrared absorption spectrum of the sample is concordant with that of the standard. |
| Sulphated Ash | ≤0.1% |
| Assay (HPLC) | (HPLC) 98% to 102% |
| Appearance of Solution | The solution is clear and not more intensely colored than reference solution BY7. |
| Acidity / Alkalinity | Add 0.3 ml of phenolphthalein solution R. The solution is colorless. Not more than 0.4 ml of 0.1 N sodium hydroxide is required to change the color of the indicator to pink. |
| Specific optical rotation | +54.4° to +55.9°, calculated with reference to the anhydrous substance. |
| Escherichia coli | Absence |
| Absorbance | The absorbance of the solution measured at 400 nm is not greater than 0.04. Dilute 1.0 ml of solution A to 10.0 ml with water R. Examine the solution form 210 nm to 300 nm. At wavelengths from 210 nm to 220 nm, the absorbance is not greater than 0.25. At wavelenghts from 270 nm to 300nm, the absorbance is not greater than 0.07. |
| TPC | <100cfu/g |
| Identification A | The infrared absorption spectrum of the sample is concordant with that of the standard. |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Acidity | Neutral |
Identification
| Property | Value |
|---|---|
| SKU | 16091931 |
| CAS Number | 64044-51-5 |
| IUPAC Name | (2R,3R,4S,5R,6S)-2-(hydroxymethyl)-6-[(2R,3S,4R,5R,6S)-4,5,6-trihydroxy-2-(hydroxymethyl)oxan-3-yl]oxyoxane-3,4,5-triol;hydrate |
| Molecular Formula | C12H22O11 · H2O |
| Molecular Weight | 360.32 |
| Exact Mass | 360.1268 |
| SMILES | C([C@@H]1[C@@H]([C@@H]([C@H]([C@@H](O1)O[C@@H]2[C@H](O[C@@H]([C@@H]([C@H]2O)O)O)CO)O)O)O)O.O |
| InChIKey | WSVLPVUVIUVCRA-KPKNDVKVSA-N |
| InChI | InChI=1S/C12H22O11.H2O/c13-1-3-5(15)6(16)9(19)12(22-3)23-10-4(2-14)21-11(20)8(18)7(10)17;/h3-20H,1-2H2;1H2/t3-,4-,5+,6+,7-,8-,9-,10-,11+,12+;/m1./s1 |
| PubChem CID | 104938 |
| REACH Code | Y113 |
| HTS Code | 17021100 |
| Tariff Code | 1702110000 |
Safety & GHS
Precautionary statements
- P264 Wash thoroughly after handling
- P280 Wear protective gloves/protective clothing/eye protection/face protection
- P308+313 IF exposed or concerned: Get medical advice/attention
Documents
Safety Data Sheets (SDS)
Available in English, French, German, Italian, Spanish.
Certificate of Analysis (CoA) by batch
Enter a lot or batch number to retrieve the CoA for that specific batch. We can generate one from spec data if no PDF is on file.
Synonyms
- a-D-Glucopyranose, 4-O-b-D-galactopyranosyl-, monohydrate
- a-Lactose monohydrate
- alpha-D-Glucopyranose, 4-O-beta-D-galactopyranosyl-, monohydrate
- alpha-D-Lactose monohydrate
- alpha-lactose hydrate
- alpha-Lactose monohydrate
- Inhalac 120 (contains b anomer)
- lactose hydrate
- Lactose monohydrate
- Respitose
Frequently asked questions
What is D-Lactose monohydrate used for?
It is commonly used as a filler or excipient in pharmaceutical formulations and as a nutrient in cell culture media.
What is the chemical formula and molecular weight of D-Lactose monohydrate?
The formula is C12H22O11 · H2O with a molecular weight of 360.32 g/mol.
How should D-Lactose monohydrate be stored?
It should be stored at ambient temperature, protected from moisture and light.
What grade of D-Lactose monohydrate is available?
Available in pharmaceutical grade, suitable for use in drug formulations and biological applications.
Can Molekula supply D-Lactose monohydrate in bulk?
Yes, Molekula can supply D-Lactose monohydrate in bulk quantities; please contact sales for pricing and availability.
What documentation comes with an order of D-Lactose monohydrate?
Each order includes a Certificate of Analysis (CoA) and safety data sheet (SDS) upon request.
Ready to order or need a custom pack?
Tell us the product, grade, and quantity — Molekula usually responds within one working day with pricing and lead time.