Aluminum hydroxide CAS 21645-51-2

alcoac30bf;alcoac330;alcoac333;alugel;alumigel;aluminahydrated;aluminicacid;Aluminiumhydrate

Aluminum hydroxide Basic information
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
vapor pressure	<0.1 hPa (20 °C)
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
Merck	14,342
Solubility Product Constant (Ksp)	pKsp: 32.89
Exposure limits	ACGIH: TWA 1 mg/m3
Stability:	Stable. Incompatible with strong bases.
CAS DataBase Reference	21645-51-2(CAS DataBase Reference)
EPA Substance Registry System	Aluminum hydroxide (21645-51-2)

Molecular weight	78	Mohs hardness	3
Density g/cm3	2.4	Ratio of refraction	1.58

Physical and Chemical Properties

Item Model H-WF -20

Al(OH)3 [%] ≥ 99.7%

oilabsorption 吸油率 ≈ 20

Mean particle diameter 粒度（D50） µ m	18-20
Whiteness 白度 [R457] ≥	98
PH value PH 值	10.0±1.5

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Mass Spectrometry Analysis

GC-MS / LC-MS/MS: Qualitative and Quantitative Analysis
ICP-MS: Trace Metal Elements (ppb Level)
TOF-MS: Precise Molecular Weight Determination

Thermal Analysis Methods

Thermogravimetric Analysis (TGA)
Differential Scanning Calorimetry (DSC)
Differential Thermal Analysis (DTA)