When I worked as an MDH sales engineer years ago, I always search for MDH and ATH on Google. But I didn’t find the answer I am searching for. And now, since I have some knowledge about chemical MDH and ATH. I decide to write one to answer this question. I hope this can help you a little bit.
When you read some academic paper or talk about flame retardant, we always see MDH and ATH, or MH and ATH this kind of descriptions. So what is exactly the meaning of MDH, MH, ATH, AH, and what is the relationship among MDH, MH, ATH, and AH?
If you are interested, please keep reading.
1. Full name of MDH, MH, ATH, AH
Below is the explanation for your reference.
|MDH||Magnesium Dihydroxide, Malate Dehydrogenase…|
|MH||Magnesium hydroxide, Malignant Hyperthermia…|
|ATH||Alumina Trihydrate, Automatic Tape Handler…|
|AH||Aluminum hydroxide, Ampere Hour…|
2. The formula of and the relation between MDH and MH
The molecular formula indicates the simple numbers of each type of atom in a molecule of a molecular substance. And chemical formula identifies each constituent element by its chemical symbol and indicates the proportionate number of atoms of each element.
MDH refers to Magnesium Dihydroxide. The molecular formula is H2MgO2. MH refers to the Magnesium Hydroxide. The chemical formula is Mg(OH)2. So we can see that magnesium hydroxide (MH) is a synonym or isomers of magnesium dihydroxide.
3. The formula of and the relation between ATH and AH
ATH refers to the acronym of Alumina Trihydrate. The molecular formula is H3AlO3. AH refer to the acronym of Aluminum hydroxide. The chemical formula is Al(OH)3.
AL(OH)3 has two-way hydrolysis in water, below is Al(OH)3 Ionization equation:
H++AlO2-+H2O→ ←Al(OH)3→ ←Al3++3OH-
So AL(OH)3 can react with both alkaline substances and acidic substances, and H3AlO3 could be written as HAlO2.H20. Because the HAlO2 will effect immediately with H2O once two substances are met, and generate AL(OH)3. So H3AlO3 is the same as AL(OH) 3, or we can say Aluminum hydroxide(AH) is a synonym of Alumina Trihydrate (ATH).
But please noted that when the molecules are the same, they may not be the same substance. For example, C2H6O could mean both Ethanol and methyl ether.
As an inorganic flame retardant, magnesium hydroxide and aluminum hydroxide are always compared together. Because they have different decomposition temperatures, different hardness, etc..
When used together in some formula, magnesium hydroxide and aluminum hydroxide will have a synergetic effect, which will achieve better flame retardant performance. That’s why you will find them together in some academic paper or flame-retardant formula. And on these occasions, MDH and MH are the same, and ATH and AH are the same.
Thank you for your time, if you have any question about this passage, please feel free to contact author Elena. Mail: [email protected]