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Aluminum Hydroxide CAS#21645-51-2

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Chemical Name：Aluminum Hydroxide

CAS No.:21645-51-2

Molecular Formula：AlH3O3

Molecular weight:78

Sample: Available

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Product Details

Aluminum Hydroxide CAS#21645-51-2

Aluminum hydroxide, insoluble in water, soluble in dilute mineral acids and alkali hydroxides (4 % suspension in water), white, amorphous powder. For other relevant properties and production, see→Aluminum Oxide, Chap. 1.1. Available as Al(OH)3·nH2O (algedrate) and algedrate hexitol complex.

Aluminum Hydroxide CAS#21645-51-2

Product Name:	Aluminum hydroxide
Synonyms:	alcoac30bf;alcoac330;alcoac333;alugel;alumigel;aluminahydrated;aluminicacid;Aluminiumhydrate
CAS:	21645-51-2
MF:	AlH3O3
MW:	78
EINECS:	244-492-7
Product Categories:	INORGANIC & ORGANIC CHEMICALS;PHARMACEUTICALS;Inorganics;Essential Chemicals;Reagent Grade;Routine Reagents;metal hydroxide
Mol File:	21645-51-2.mol

Aluminum hydroxide Chemical Properties

Melting point	300℃
Boiling point	2980℃[at 101 325 Pa]
density	2.42 g/cm3 at 20 °C
bulk density	~90g/100 mL
vapor pressure	<0.1 hPa (20 °C)
refractive index	Average refractive index: 1.57-1.59
storage temp.	Store at +5°C to +30°C.
solubility	0.0015g/l
form	colloidal suspension
color	White
Specific Gravity	2.42
Odor	Odorless
PH Range	>7
PH	8-9 (100g/l, H2O, 20℃)(slurry)
Water Solubility	insoluble
Crystal Structure	Monoclinic
Merck	14,342
Solubility Product Constant (Ksp)	pKsp: 32.89
Exposure limits	ACGIH: TWA 1 mg/m3
Dielectric constant	2.2（Ambient）
Stability:	Stable. Incompatible with strong bases.
LogP	-1.380 (est)
CAS DataBase Reference	21645-51-2(CAS DataBase Reference)
EPA Substance Registry System	Aluminum hydroxide (21645-51-2)

Product Usage

Pharmaceutical field: As an antacid, it can neutralize stomach acid, and is used to treat diseases such as excessive stomach acid and gastric ulcer, and relieve stomach discomfort.

Flame retardant field: It is a commonly used inorganic flame retardant, added to plastics, rubber, textiles and other materials, absorb heat when heat decomposition, release water vapor, play a flame retardant, smoke suppression role, improve the fire performance of the material.

Chemical raw materials: It is an important raw material for the preparation of aluminum oxide, aluminum sulfate, polyaluminum chloride and other aluminum compounds.

Other applications: Used as a rubbing agent in toothpaste to help clean teeth; It is used in the paper industry to improve the water resistance and printing performance of paper. Used as an additive in cosmetics, it has the function of absorbing oil and regulating pH value.

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