Aluminum hydroxide CAS#21645-51-2

Boiling point 

2980℃[at 101 325 Pa]

bulk density

~90g/100 mL

density 

2.42 g/cm3 at 20 °C

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

8-9 (100g/l, H2O, 20℃)(slurry)

PH Range

>7

Water Solubility 

insoluble

Crystal Structure

Monoclinic

Merck 

14,342

Solubility Product Constant (Ksp)

pKsp: 32.89

Dielectric constant

2.2（Ambient）

Exposure limits

ACGIH: TWA 1 mg/m3

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)

Risk Statements 

36

Safety Statements 

26-36

WGK Germany 

-

RTECS 

BD0940000

TSCA 

Yes

HS Code 

28183000

Hazardous Substances Data

21645-51-2(Hazardous Substances Data)

Toxicity

TDLo oral in child: 79gm/kg/2Y-I