Magnesium hydroxide
氢氧化镁
Also known as: Magnesium hydrate, Milk of magnesia, Magnesium dihydroxide, Caustic magnesite, Brucite, Magnesia hydrate, Magnesium(II) hydroxide
Magnesium hydroxide (CAS 1309-42-8) is a compound in the Inorganic Chemicals category listed in the Jingsj chemical database. It has the molecular formula H2MgO2 and a molecular weight of 58.320 g/mol. It is also known as Magnesium hydrate, Milk of magnesia and Magnesium dihydroxide. Key properties include a melting point of 350ºC ( Decomposes), a boiling point of 100ºC at 760mmHg, a density of 2.36g/cm3 and a flash point of will not burn. GHS signal word: Warning. It is listed by 1 supplier(s); request a quote for pricing. Record last updated Aug 21, 2026.
- CAS No.
- 1309-42-8
- Jingsj CID
- J-1507082-3
- Molecular Formula
- H2MgO2
- Chinese Name
- 氢氧化镁
- Molecular Weight
- 58.320 g/mol
- Category
- Inorganic Chemicals
- Last updated
- 8/21/2026
Supplier Offers
1| Supplier | Purity / Pack | Base Price | Unit Price | Origin | |
|---|---|---|---|---|---|
Made to Order | 99.9% 500g | - | - | CN China MOQ 500g | |
Made to Order | 99.9% 1kg | - | - | CN China MOQ 1kg | |
Made to Order | 99.9% 25kg | - | - | CN China MOQ 25kg |
Physicochemical Properties
| Melting Point | 350ºC ( Decomposes) |
|---|---|
| Boiling Point | 100ºC at 760mmHg |
| Density | 2.36g/cm3 |
| Flash Point | will not burn |
GHS Safety & Compliance
Frequently Asked Questions
What is the CAS number of Magnesium hydroxide?
The CAS number of Magnesium hydroxide is 1309-42-8.
What are the molecular formula and molecular weight of Magnesium hydroxide?
Magnesium hydroxide has molecular formula H2MgO2 and molecular weight 58.320 g/mol.
Which suppliers offer Magnesium hydroxide?
1 supplier(s) listed; request a quote for pricing.
Is Magnesium hydroxide hazardous?
Magnesium hydroxide has GHS signal word Warning.
Data compiled from public chemical databases and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "Magnesium hydroxide (CAS 1309-42-8)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1507082-3 (accessed 2026-10-22).
Data for reference only; verify specifications, grades and regulatory status with suppliers before purchase.