Lactose
Also known as: 4-(b-D-Galactosido)-D-glucose, 4-O-b-D-galactopyranosyl-b-D-glucopyranose, 4-O-β-D-Galactopyranosyl-β-D-glucopyranose, Aletobiose, D-LACTOSE, D-Lactose Anhydrous, EINECS 200-559-2, Galactinum, LACTIN, LACTOBIOSE, Lactose (8CI), MFCD00151251, Osmolactan, SUGAR MILK, Saccharum lactin, b-D-glucopyranose, 4-O-b-D-galactopyranosyl-, b-Lactose, lactose, lactose,anhydrous, saccharumlactin
Lactose (CAS 63-42-3) is a compound in the Organic Compounds category listed in the Jingsj chemical database. It has the molecular formula C12H22O11 and a molecular weight of 342.297 g/mol. Key properties include a melting point of 222.8°C, a boiling point of 667.9±55.0 °C at 760 mmHg, a density of 1.8±0.1 g/cm3 and a flash point of 357.8±31.5 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 63-42-3
- Jingsj CID
- J-38261-0
- Molecular Formula
- C12H22O11
- Molecular Weight
- 342.297 g/mol
- Category
- Organic Compounds
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | 222.8°C |
|---|---|
| Boiling Point | 667.9±55.0 °C at 760 mmHg |
| Density | 1.8±0.1 g/cm3 |
| Flash Point | 357.8±31.5 °C |
| Exact Mass | 342.116211 |
| PSA | 197.37000 |
| LogP | -3.41 |
| Vapor Pressure | 0.0±4.6 mmHg at 25°C |
| Refractive Index | 1.652 |
| Additional Property | 5-10 g/100 mL at 20 ºC |
Activity & Biological Data
| Target | Human Endogenous Metabolite |
|---|---|
| Additional Information | [1]. Kleessen B, et al. Effects of inulin and lactose on fecal microflora, microbial activity, and bowel habit in elderly constipated persons. Am J Clin Nutr. 1997 May;65(5):1397-402. |
Customs & Trade Information
| HS Code | 1702190000 |
|---|
Frequently Asked Questions
What is the CAS number of Lactose?
The CAS number of Lactose is 63-42-3.
What are the molecular formula and molecular weight of Lactose?
Lactose has molecular formula C12H22O11 and molecular weight 342.297 g/mol.
What are the upstream and downstream products of Lactose?
For Lactose, Upstream Products: β-D-Glucose, alpha-D-Cellobiose octaacetate, 2,3,4,6-Tetra-O-acetyl-alpha-D-galactopyranosyl bromide; Downstream Products: alpha-D-Cellobiose octaacetate, Gluconic acid, Gluconic acid.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "Lactose (CAS 63-42-3)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-38261-0 (accessed 2026-11-06).
Data for reference only; verify product details with suppliers before purchase.