Ultrafine Aluminum Hydroxide

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By Color

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Ultrafine Aluminum Hydroxide

Al(OH)₃

CAS NO. 21645-51-2

▎General Properties

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

▎Physical and Chemical Properties

Item Model		HJX-1	HJX-1S
Chemical constituent	Al(OH)₃ [%] ≥	99.5	99.5
	Al₂O₃ [%] ≥	64.5	64.5
	SiO₂ [%] ≤	0.02	0.02
	Fe₂O₃ [%] ≤	0.01	0.01
	Na₂O [%] ≤	0.30	0.30
	Loss on ignition ≤	35.0	35.0
	Attached water ≤	0.4	0.3
	+325 mesh 325 mesh≤	0.01	0.01
	oil absorption ≈	32	31
Mean particle diameter 粒度（D50） µ m≈		2.5	2.5
Whiteness [R457] ≥		95	95
PH value ≈		9