Molekula
alpha-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
Alpha-D-Lactose monohydrate is a disaccharide sugar used in pharmaceuticals, food products, and laboratory media as a filler, stabilizer, or nutrient. It is a white, crystalline powder with a molecular formula of C12H22O11·H2O and a molecular weight of 360.31 g/mol. It is stable at ambient temperatures and has no signal word. Molekula supplies alpha-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
These pack sizes aren't a limit. Molekula manufactures, sources and repacks to order — if you need 500 kg and only see 1 kg listed, . We quote from grams to multi-tonne.
Need a different size? Add the nearest pack and change the size in your basket — we price it at the same rate per unit.
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1 kg — £46.50 per pack ex VAT · £55.80 inc. VAT
Need a different quantity or pack?
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 powder |
| Water | 4.5 - 5.5% |
| Heavy metals | ≤50ug/g |
| Loss on Drying | ≤0.5% |
| Optical Rotation | +54.4 to +55.9 |
| Impurities | ≤0.07% |
| Residue on Ignition | ≤0.1% |
| TAMC | ≤100cfu/g |
| Mould & Yeast | ≤50cfu/g |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Acidity | Neutral |
Identification
| Property | Value |
|---|---|
| SKU | 90028400 |
| CAS Number | 5989-81-1 |
| 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 | 360.31 |
| 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 | 2918115100 |
| Tariff Code | 2918110000 |
Safety & GHS
Precautionary statements
- P280 Wear protective gloves/protective clothing/eye protection/face protection
Documents
Safety Data Sheets (SDS)
Available in English, English (US), 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-lactose hydrate
- alpha-Lactose monohydrate
- D-Lactose monohydrate
- Inhalac 120 (contains b anomer)
- lactose hydrate
- Lactose monohydrate
- Respitose
Frequently asked questions
What is alpha-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 alpha-D-Lactose monohydrate?
The formula is C12H22O11·H2O with a molecular weight of 360.31 g/mol.
How should alpha-D-Lactose monohydrate be stored?
It should be stored at ambient temperature, protected from moisture and light.
What grade of alpha-D-Lactose monohydrate is available?
Available in pharmaceutical grade, suitable for use in drug formulations and biological applications.
Can Molekula supply alpha-D-Lactose monohydrate in bulk?
Yes, Molekula offers bulk quantities upon request; please contact our sales team for pricing and availability.
What documentation comes with an order of alpha-D-Lactose monohydrate?
Each order includes a Certificate of Analysis (CoA) and safety data sheet (SDS); additional documentation is available 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.