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 1999 · 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
In stock — same-day dispatch
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.
Quality certificates
Molekula Group is certified to ISO 9001:2015 (quality) and ISO 14001:2015 (environmental management), audited by a UKAS-accredited body. Both certificates are valid to 17 May 2028.
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.