Aluminum hydroxide

  • Trihydroxyaluminum
  • Aluminum oxide trihydrate
  • Alumina hydrate
Formula
Al(OH)3
Structure
Description
Odorless, white crystals, powder or granules.
Uses
Desiccant powder.

Registry Numbers and Inventories.
CAS
21645-51-2
EC (EINECS/ELINCS)
244-492-7
RTECS
BD0940000
RTECS class
Drug; Reproductive Effector; Human Data
Merck
12,355
Beilstein/Gmelin
22216 (G)
Swiss Giftliste 1
G-4621
Canada DSL/NDSL
DSL
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed
Japan ENCS (MITI)
Listed
Korea ECL
Listed

Properties.
Formula
AlH3O3
Formula mass
78.00
Melting point, °C
300
Density
2.1 - 2.7 g/cm3
Solubility in water
Insoluble

Hazards and Protection.
Storage
Store in a tightly closed container. Store in a cool, dry, well-ventilated area away from incompatible substances.
Insufficient information
Handling
Wash thoroughly after handling. Remove contaminated clothing and wash before reuse. Use with adequate ventilation. Minimize dust generation and accumulation. Avoid contact with skin and eyes. Avoid ingestion and inhalation.
Protection
Eyes: Wear appropriate protective eyeglasses or chemical safety goggles as described by OSHA's eye and face protection regulations in 29 CFR 1910.133 or European Standard EN166. Skin: Wear appropriate gloves to prevent skin exposure. Clothing: Wear appropriate protective clothing to prevent skin exposure.
Respirators
A respiratory protection program that meets OSHA's 29 CFR 1910.134 and ANSI Z88.2 requirements or European Standard EN 149 must be followed whenever workplace conditions warrant a respirator's use.
Small spills/leaks
Vacuum or sweep up material and place into a suitable disposal container. Clean up spills immediately, using the appropriate protective equipment. Avoid generating dusty conditions. Provide ventilation.
Stability
Stable under normal temperatures and pressures. Absorbs carbon dioxide from the air. Gels on prolonged contact with water. Absorbs acids. When coprecipitated with bismuth hydroxide and reduced by Hydrogen, becomes violently flammable in air.
Incompatibilities
Strong oxidizing agents, strong acids, chlorinated rubber, water.
Decomposition
Aluminum oxide.

Fire.
Fire fighting
Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. During a fire, irritating and highly toxic gases may be generated by thermal decomposition or combustion. Non-combustible, substance itself does not burn but may decompose upon heating to produce irritating, corrosive and/or toxic fumes. Extinguishing media: Substance is noncombustible; use agent most appropriate to extinguish surrounding fire.
Fire potential
Mixture of bismuth hydroxide and aluminum hydroxide flammable in air. Low.
Health
0
 
Flammability
0
 
 
Reactivity
1
 

Health.
Exposure limit(s)
MAK:1.5 mg/m3; (1997)
Poison_Class
-
Exposure effects
The toxicological properties of this substance have not been fully investigated.
   Ingestion
Ingestion of large amounts may cause gastrointestinal irritation. Ingestion of large amounts may cause pain, constipation or diarrhea.
   Inhalation
Causes irritation of the mucous membrane and upper respiratory tract.
   Skin
Dust may cause mechanical irritation.
   Eyes
Causes eye irritation.

First aid
 
   Ingestion
Do NOT induce vomiting. If victim is conscious and alert, give 2-4 cupfuls of milk or water. Never give anything by mouth to an unconscious person. Get medical aid immediately.
   Inhalation
Remove from exposure to fresh air immediately. If not breathing, give artificial respiration. If breathing is difficult, give oxygen. Get medical aid if cough or other symptoms appear.
   Skin
Flush skin with plenty of soap and water for at least 15 minutes while removing contaminated clothing and shoes. Get medical aid if irritation develops or persists. Wash clothing before reuse.
   Eyes
Immediately flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. Get medical aid.

Transport.
HS Code
2818 30 00