Aluminium hydroxide - wikipedia Aluminium hydroxide Aluminium hydroxide Names Preferred IUPAC name Aluminium hydroxide Systematic IUPAC name Aluminium ( 3 + ) trioxidanide Other names Aluminic acid Aluminic hydroxide Aluminium ( III ) hydroxide Aluminium hydroxide Aluminum trihydroxide Hydrated alumina Orthoaluminic acid Identifiers CAS Number 21645 - 51 - 2 3D model ( JSmol ) Interactive image ChEBI CHEBI : 33130 ChemSpider 8351587 DrugBank DB06723 ECHA InfoCard 100.040. 433 KEGG D02416 PubChem CID 10176082 RTECS number BD0940000 UNII 5QB0T2IUN0 InChI InChI = 1S / Al. 3H2O / h ; 3 * 1H2 / q + 3 ; ; ; / p - 3 Key : WNROFYMDJYEPJX - UHFFFAOYSA - K A02AB02 ( WHO ) ( algeldrate ) InChI = 1 / Al. 3H2O / h ; 3 * 1H2 / q + 3 ; ; ; / p - 3 Key : WNROFYMDJYEPJX - DFZHHIFOAJ SMILES ( OH - ). ( OH - ). ( OH - ). ( Al + 3 ) Properties Chemical formula Al ( OH ) Molar mass 78.00 g / mol Appearance White amorphous powder Density 2.42 g / cm, solid Melting point 300 ° C ( 572 ° F ; 573 K ) Solubility in water 0.0001 g / 100 mL Solubility product ( K ) 3 × 10 Solubility soluble in acids and alkalis Acidity ( pK ) > 7 Isoelectric point 7.7 Thermochemistry Std enthalpy of formation ( Δ H ) − 1277 kJ mol Pharmacology ATC code A02AB01 ( WHO ) Pregnancy category US : B ( No risk in non-human studies ) Hazards Safety data sheet External MSDS GHS pictograms GHS hazard statements H319, H335 GHS precautionary statements P264, P261, P280, P271, P312, P304 + 340, P305 + 351 + 338, P337 + 313 NFPA 704 0 0 Flash point Non-flammable Lethal dose or concentration ( LD, LC ) : LD ( median dose ) > 5000 mg / kg ( rat, oral ) Related compounds Other anions None Related compounds Sodium oxide, aluminium oxide hydroxide Except where otherwise noted, data are given for materials in their standard state ( at 25 ° C ( 77 ° F ), 100 kPa ). N verify ( what is ? ) Infobox references Aluminium hydroxide, Al ( OH ), is found in nature as the mineral gibbsite ( also known as hydrargillite ) and its three much rarer polymorphs : bayerite, doyleite, and nordstrandite. Aluminium hydroxide is amphoteric in nature, i.e., it has both basic and acidic properties. Closely related are aluminium oxide hydroxide, AlO ( OH ), and aluminium oxide or alumina ( Al O ), the latter of which is also amphoteric. These compounds together are the major components of the aluminium ore bauxite. Contents 1 Nomenclature 2 Properties 2.1 Polymorphism 3 Production 4 Uses 4.1 Fire retardant 4.2 Pharmaceutical 4.2. 1 Potential adverse effects 5 References 6 External links Nomenclature The naming for the different forms of aluminium hydroxide is ambiguous and there is no universal standard. All four polymorphs have a chemical composition of aluminium trihydroxide ( an aluminium atom attached to three hydroxide groups ). Gibbsite is also known as hydrargillite, named after the Greek words for water ( hydra ) and clay ( argylles ). The first compound named hydrargillite was thought to be aluminium hydroxide, but was later found to be aluminium phosphate ; despite this, both gibbsite and hydrargillite are used to refer to the same polymorphism of aluminium hydroxide, with gibbsite used most commonly in the United States and hydrargillite used more often in Europe. In 1930, it was referred to as α - alumina trihydrate to contrast it with bayerite, which was called β - alumina trihydrate ( the alpha and beta designations were used to differentiate the more - and less - common forms respectively ). In 1957, a symposium on alumina nomenclature attempted to develop a universal standard, resulting in gibbsite being designated γ - Al ( OH ), bayerite becoming α - Al ( OH ), and nordstrandite being designated Al ( OH ). Based on their crystallographic properties, a suggested nomenclature and designation is for gibbsite to be α - Al ( OH ), bayerite to be designated β - Al ( OH ), and both nordstrandite and doyleite are designated Al ( OH ). Under this designation, the α and β prefixes refer to hexagonal, close - packed structures and altered or dehydrated polymorphisms respectively, with no differentiation between nordstrandite and doyleite. Properties Gibbsite has a typical metal hydroxide structure with hydrogen bonds. It is built up of double layers of hydroxyl groups with aluminium ions occupying two - thirds of the octahedral holes between the two layers. Aluminium hydroxide is amphoteric. In acid, it acts as a Brønsted - Lowry base by picking up hydrogen ions and neutralizes the acid, yielding a salt : 3HCl + Al ( OH ) → AlCl + 3H O In bases, it acts a Lewis acid by taking an electron pair from the hydroxide ions : Al ( OH ) + OH → Al ( OH ) Polymorphism Four polymorphs of aluminium hydroxide exist, all based on the common combination of one aluminium atom and three hydroxide molecules into different crystalline arrangements that determine the appearance and properties of the compound. The four combinations are : Gibbsite Bayerite Nordstrandite Doyleite All polymorphs are composed of layers of octahedral aluminium hydroxide units with the aluminium atom in the centre and the hydroxyl groups on the sides, with hydrogen bonds holding the layers together. The polymorphisms vary in how the layers stack together, with the arrangements of the molecules and layers determined by the acidity, presence of ions ( including salt ) and the surface of the minerals the substance forms on. Under most conditions, gibbsite is the most chemically stable form of aluminium hydroxide. All forms of Al ( OH ) crystals are hexagonal. Production Virtually all the aluminium hydroxide used commercially is manufactured by the Bayer process which involves dissolving bauxite in sodium hydroxide at temperatures up to 270 ° C ( 518 ° F ). The waste solid, bauxite tailings, is removed and aluminium hydroxide is precipitated from the remaining solution of sodium aluminate. This aluminium hydroxide can be converted to aluminium oxide or alumina by calcination. The residue or bauxite tailings, which is mostly iron oxide, is highly caustic due to residual sodium hydroxide. It was historically stored in lagoons ; this led to the Ajka alumina plant accident in 2010 in Hungary, where a dam bursting led to the drowning of nine people. An additional 122 sought treatment for chemical burns. The mud contaminated 40 square kilometres ( 15 sq mi ) of land and reached the Danube. While the mud was considered non-toxic due to low levels of heavy metals, the associated slurry had pH of 13. Uses One of the major uses of aluminium hydroxide is as a feedstock for the manufacture of other aluminium compounds : speciality calcined aluminas, aluminium sulfate, polyaluminium chloride, aluminium chloride, zeolites, sodium aluminate, activated alumina, and aluminium nitrate. Freshly precipitated aluminium hydroxide forms gels, which are the basis for the application of aluminium salts as flocculants in water purification. This gel crystallizes with time. Aluminium hydroxide gels can be dehydrated ( e.g. using water - miscible non-aqueous solvents like ethanol ) to form an amorphous aluminium hydroxide powder, which is readily soluble in acids. Aluminium hydroxide powder which has been heated to an elevated temperature under carefully controlled conditions is known as activated alumina and is used as a desiccant, as an adsorbent in gas purification, as a Claus catalyst support for water purification, and as an adsorbent for the catalyst during the manufacture of polyethylene by the Sclairtech process. Fire Retardant Aluminium hydroxide also finds use as a fire retardant filler for polymer applications in a similar way to magnesium hydroxide and mixtures of huntite and hydromagnesite. It decomposes at about 180 ° C ( 356 ° F ), absorbing a considerable amount of heat in the process and giving off water vapour. In addition to behaving as a fire retardant, it is very effective as a smoke suppressant in a wide range of polymers, most especially in polyesters, acrylics, ethylene vinyl acetate, epoxies, PVC and rubber. Pharmaceutical Under the generic name `` algeldrate '', aluminium hydroxide is used as an antacid in humans and animals ( mainly cats and dogs ). It is preferred over other alternatives such as sodium bicarbonate because Al ( OH ), being insoluble, does not increase the pH of stomach above 7 and hence, does not trigger secretion of excess acid by the stomach. Brand names include Alu - Cap, Aludrox, Gaviscon or Pepsamar. It reacts with excess acid in the stomach, reducing the acidity of the stomach content, which may relieve the symptoms of ulcers, heartburn or dyspepsia. Such products can cause constipation, because the aluminium ions inhibit the contractions of smooth muscle cells in the gastrointestinal tract, slowing peristalsis and lengthening the time needed for stool to pass through the colon. Some such products ( such as Maalox ) are formulated to minimize such effects through the inclusion of equal concentrations of magnesium hydroxide or magnesium carbonate, which have counterbalancing laxative effects. This compound is also used to control hyperphosphatemia ( elevated phosphate, or phosphorus, levels in the blood ) in people and animals suffering from kidney failure. Normally, the kidneys filter excess phosphate out from the blood, but kidney failure can cause phosphate to accumulate. The aluminium salt, when ingested, binds to phosphate in the intestines and reduce the amount of phosphorus that can be absorbed. Precipitated aluminium hydroxide is included as an adjuvant in some vaccines ( e.g. anthrax vaccine ). One of the well - known brands of aluminium hydroxide adjuvant is Alhydrogel, made by Brenntag Biosector. Since it absorbs protein well, it also functions to stabilize vaccines by preventing the proteins in the vaccine from precipitating or sticking to the walls of the container during storage. Aluminium hydroxide is sometimes mistakenly called `` alum '', which properly refers to aluminium potassium sulfate. Vaccine formulations containing aluminium hydroxide stimulate the immune system by inducing the release of uric acid, an immunological danger signal. This strongly attracts certain types of monocytes which differentiate into dendritic cells. The dendritic cells pick up the antigen, carry it to lymph nodes, and stimulate T cells and B cells. It appears to contribute to induction of a good Th2 response, so is useful for immunizing against pathogens that are blocked by antibodies. However, it has little capacity to stimulate cellular ( Th1 ) immune responses, important for protection against many pathogens, nor is it useful when the antigen is peptide - based. Potential adverse effects In the 1960s and 1970s it was speculated that aluminium was related to various neurological disorders, including Alzheimer 's disease. Since then, multiple epidemiological studies have found no connection between exposure to aluminium and neurological disorders. References Jump up ^ For solubility product : `` Archived copy ''. Archived from the original on 15 June 2012. Retrieved 2012 - 05 - 17. Jump up ^ For isoelectric point : Gayer, K.H. ; Thompson, L.C. ; Zajicek, O.T. ( September 1958 ). `` The solubility of aluminum hydroxide in acidic and basic media at 25 ? c ''. Canadian Journal of Chemistry. 36 ( 9 ) : 1268 -- 1271. ISSN 0008 - 4042. doi : 10.1139 / v58 - 184. Retrieved 2017 - 07 - 01. Jump up ^ Zumdahl, Steven S. ( 2009 ). Chemical Principles ( 6th ed. ). Houghton Mifflin Company. ISBN 0 - 618 - 94690 - X. Jump up ^ Black, Ronald A. ; Hill, D. Ashley ( 2003 - 06 - 15 ). `` Over-the - Counter Medications in Pregnancy ''. American Family Physician. 67 ( 12 ) : 2517 -- 2524. ISSN 0002 - 838X. Retrieved 2017 - 07 - 01. ^ Jump up to : Karamalidis, AK ; Dzombak DA ( 2010 ). Surface Complexation Modeling : Gibbsite. John Wiley & Sons. pp. 15 -- 17. ISBN 0 - 470 - 58768 - 7. Jump up ^ Wells, A.F. ( 1975 ), Structural Inorganic Chemistry ( 4th ed. ), Oxford : Clarendon Press ^ Jump up to : Evans, KA ( 1993 ). `` Properties and uses of aluminium oxides and aluminium hydroxides ''. In A.J. Downs. Chemistry of aluminium, gallium, indium, and thallium ( 1st ed. ). London ; New York : Blackie Academic & Professional. ISBN 9780751401035. ^ Jump up to : Boundless ( 2016 - 07 - 26 ). `` Basic and Amphoteric Hydroxides ''. Boundless Chemistry. Retrieved 2017 - 07 - 02. Jump up ^ Hind, AR ; Bhargava SK ; Grocott SC ( 1999 ). `` The Surface Chemistry of Bayer Process Solids : A Review '' ( PDF ). Colloids Surf Physiochem Eng Aspects. 146 : 359 -- 74. doi : 10.1016 / S0927 - 7757 ( 98 ) 00798 - 5. Jump up ^ `` Hungary Battles to Stem Torrent of Toxic Sludge ''. BBC News Website. 5 October 2010. Jump up ^ Hollingbery, LA ; Hull TR ( 2010 ). `` The Fire Retardant Behaviour of Huntite and Hydromagnesite - A Review '' ( PDF ). Polymer Degradation and Stability. 95 ( 12 ) : 2213 -- 2225. doi : 10.1016 / j. polymdegradstab. 2010.08. 019. Jump up ^ Hollingbery, LA ; Hull TR ( 2010 ). `` The Thermal Decomposition of Huntite and Hydromagnesite - A Review '' ( PDF ). Thermochimica Acta. 509 : 1 -- 11. doi : 10.1016 / j. tca. 2010.06. 012. Jump up ^ Hollingbery, LA ; Hull TR ( 2012 ). `` The Fire Retardant Effects of Huntite in Natural Mixtures with Hydromagnesite '' ( PDF ). Polymer Degradation and Stability. 97 ( 4 ) : 504 -- 512. doi : 10.1016 / j. polymdegradstab. 2012.01. 024. Jump up ^ Hollingbery, LA ; Hull TR ( 2012 ). `` The Thermal Decomposition of Natural Mixtures of Huntite and Hydromagnesite '' ( PDF ). Thermochimica Acta. 528 : 45 -- 52. doi : 10.1016 / j. tca. 2011.11. 002. Jump up ^ Hull, TR ; Witkowski A ; Hollingbery LA ( 2011 ). `` Fire Retardant Action of Mineral Fillers '' ( PDF ). Polymer Degradation and Stability. 96 ( 8 ) : 1462 -- 1469. doi : 10.1016 / j. polymdegradstab. 2011.05. 006. Jump up ^ Huber Engineered Materials. `` Huber Non-Halogen Fire Retardant Additives '' ( PDF ). Retrieved 2017 - 07 - 03. Jump up ^ Galbraith, A ; Bullock, S ; Manias, E ; Hunt, B ; Richards, A ( 1999 ). Fundamentals of pharmacology : a text for nurses and health professionals. Harlow : Pearson. p. 482. Jump up ^ Papich, Mark G. ( 2007 ). `` Aluminum Hydroxide and Aluminum Carbonate ''. Saunders Handbook of Veterinary Drugs ( 2nd ed. ). St. Louis, Mo : Saunders / Elsevier. pp. 15 -- 16. ISBN 9781416028888. Jump up ^ Washington, Neena ( 2 August 1991 ). Antacids and Anti Reflux Agents. Boca Raton, FL : CRC Press. p. 10. ISBN 0 - 8493 - 5444 - 7. Jump up ^ Bill, Robert L. ( 2016 - 09 - 01 ). Clinical Pharmacology and Therapeutics for Veterinary Technicians - E-Book. Elsevier Health Sciences. p. 105. ISBN 9780323444026. Jump up ^ Plumb, Donald C. ( 2011 ). `` Aluminum Hydroxide ''. Plumb 's Veterinary Drug Handbook ( 7th ed. ). Stockholm, Wisconsin ; Ames, Iowa : Wiley. pp. 36 -- 37. ISBN 9780470959640. Jump up ^ Lifelearn Inc. ( 2010 - 11 - 01 ). `` Aluminum Hydroxide ''. Know Your Pet. Retrieved 2017 - 06 - 30. Jump up ^ http://www.brenntag.com/biosector/en/biosector/about-brenntag-biosector/index.jsp Jump up ^ Kool, M ; Soullié T ; van Nimwegen M ; Willart MA ; Muskens F ; Jung S ; Hoogsteden HC ; Hammad H ; Lambrecht BN ( 2008 - 03 - 24 ). `` Alum adjuvant boosts adaptive immunity by inducing uric acid and activating inflammatory dendritic cells ''. J Exp Med. 205 ( 4 ) : 869 -- 82. PMC 2807488. PMID 18362170. doi : 10.1084 / jem. 20071087. Jump up ^ Petrovsky N, Aguilar JC ( 2004 ). `` Vaccine adjuvants : current state and future trends ''. Immunol Cell Biol. 82 ( 5 ) : 488 -- 96. PMID 15479434. doi : 10.1111 / j. 0818 - 9641.2004. 01272. x. Jump up ^ Cranage, MP ; Robinson A ( 2003 ). Robinson A ; Hudson MJ ; Cranage MP, eds. Vaccine Protocols - Volume 87 of Methods in Molecular Medicine Biomed Protocols ( 2nd ed. ). Springer. p. 176. ISBN 1 - 59259 - 399 - 2. Jump up ^ `` Alzheimer 's Myth 's ''. Alzheimer 's Association. Retrieved 2012 - 07 - 29. Jump up ^ Khan, A ( 2008 - 09 - 01 ). `` Aluminium and Alzheimer 's disease ''. Alzheimer 's Society. Retrieved 2012 - 03 - 08. Jump up ^ Rondeau V ( 2002 ). `` A review of epidemiologic studies on aluminum and silica in relation to Alzheimer 's disease and associated disorders ''. Rev Environ Health. 17 ( 2 ) : 107 -- 21. PMC 4764671. PMID 12222737. doi : 10.1515 / REVEH. 2002.17. 2.107. Jump up ^ Martyn CN, Coggon DN, Inskip H, Lacey RF, Young WF ( May 1997 ). `` Aluminum concentrations in drinking water and risk of Alzheimer 's disease ''. Epidemiology. 8 ( 3 ) : 281 -- 6. JSTOR 3702254. PMID 9115023. doi : 10.1097 / 00001648 - 199705000 - 00009. Jump up ^ Graves AB, Rosner D, Echeverria D, Mortimer JA, Larson EB ( September 1998 ). `` Occupational exposures to solvents and aluminium and estimated risk of Alzheimer 's disease ''. Occup Environ Med. 55 ( 9 ) : 627 -- 33. PMC 1757634. PMID 9861186. doi : 10.1136 / oem. 55.9. 627. External links International Chemical Safety Card 0373 `` Some properties of aluminum hydroxide precipitated in the presence of clays '', Soil Research Institute, RC Turner, Department of Agriculture, Ottawa Effect of ageing on properties of polynuclear hydroxyaluminum cations A second species of polynuclear hydroxyaluminum cation, its formation and some of its properties Hydroxides H O He LiOH Be ( OH ) NH H O O Ne NaOH Mg ( OH ) Al ( OH ) Si Cl Ar KOH Ca ( OH ) Sc ( OH ) Ti V Cr ( OH ) Cr ( OH ) Mn ( OH ) Fe ( OH ) Fe ( OH ) Co ( OH ) Ni ( OH ) CuOH Cu ( OH ) Zn ( OH ) Ga ( OH ) Ge ( OH ) As Se Br Kr RbOH Sr ( OH ) Y ( OH ) Zr ( OH ) Nb Mo Tc Ru Rh Pd AgOH Cd ( OH ) In ( OH ) Sn ( OH ) Sn ( OH ) Sb ( OH ) Te Xe CsOH Ba ( OH ) * Hf Ta Re Os Ir Pt Au ( OH ) Hg ( OH ) TlOH Tl ( OH ) Pb ( OH ) Pb ( OH ) Bi ( OH ) Po At Rn Fr Ra * * Rf Db Sg Bh Hs Mt Ds Rg Cn Nh Fl Mc Lv Ts Og ↓ * La ( OH ) Ce ( OH ) Pr ( OH ) Nd ( OH ) Pm ( OH ) Sm ( OH ) Eu ( OH ) Gd ( OH ) Tb ( OH ) Dy ( OH ) Ho ( OH ) Er ( OH ) Tm ( OH ) Yb ( OH ) Lu ( OH ) * * Ac Th ( OH ) Pa UO ( OH ) Np Pu Am Cm ( OH ) Bk Cf Es Fm Md No Lr Aluminium compounds Al ( I ) AlBr AlCl AlF AlI Al O Al ( II ) AlB AlB AlO Al ( III ) AlAs Al ( BH ) AlBr AlCl AlF AlH AlI AlN Al ( NO ) Al ( CO ) Al ( OH ) Al ( OH ) OAc Al ( OH ) ( OAc ) Al ( OAc ) Al SO ( OAc ) AlP AlPO AlSb Al ( C H O ) Al ( MnO ) Al ( MoO ) Al O Al S Al ( SO ) Al Se Al Te Al SiO Al C AlOHO Al ( OH ) CO C H NaAlH ( OC H OCH ) Alums ( NH ) Al ( SO ) KAl ( SO ) NaAl ( SO ) Organoaluminium ( III ) compounds ( Al ( CH ) ) ( Al ( C H ) ) Al ( CH CH ( CH ) ) Al ( C H ) Cl Al ( C H ) CN Al ( CH CH ( CH ) ) H Al ( C H ) Cl C H Cl Ti ( C H ) CH ClAl ( CH ) Drugs for acid related disorders : Antacids ( A02A ) Magnesium ( increases motility ) Magnesium carbonate Magnesium oxide Magnesium peroxide Magnesium hydroxide Magnesium silicate Aluminium ( decreases motility ) Aceglutamide aluminum Algeldrate Aluminium phosphate Aluminium acetoacetate Aloglutamol Aluminium glycinate Carbaldrate Calcium Calcium carbonate Calcium silicate Sodium Sodium bicarbonate Combinations and complexes of aluminium, calcium and magnesium Almagate Almasilate Hydrotalcite Magaldrate Drugs for treatment of hyperkalemia and hyperphosphatemia ( V03AE ) Potassium binders Patiromer Polystyrene sulfonate Sodium zirconium cyclosilicate Phosphate binders Aluminium hydroxide Calcium acetate Calcium acetate / magnesium carbonate Calcium carbonate Colestilan Lanthanum carbonate Sevelamer Sucroferric oxyhydroxide Molecules detected in outer space Molecules Diatomic Aluminium monochloride Aluminium monofluoride Aluminium monoxide Argonium Carbon monophosphide Carbon monosulfide Carbon monoxide Carborundum Cyanogen radical Diatomic carbon Fluoromethylidynium Hydrogen chloride Hydrogen fluoride Hydrogen ( molecular ) Hydroxyl radical Iron ( II ) oxide Magnesium monohydride cation Methylidyne radical Nitric oxide Nitrogen ( molecular ) Nitrogen monohydride Nitrogen sulfide Oxygen ( molecular ) Phosphorus monoxide Phosphorus mononitride Potassium chloride Silicon carbide Silicon mononitride Silicon monoxide Silicon monosulfide Sodium chloride Sodium iodide Sulfur monohydride Sulfur monoxide Titanium oxide Triatomic Aluminium hydroxide Aluminium isocyanide Amino radical Carbon dioxide Carbonyl sulfide CCP radical Chloronium Diazenylium Dicarbon monoxide Disilicon carbide Ethynyl radical Formyl radical Hydrogen cyanide ( HCN ) Hydrogen isocyanide ( HNC ) Hydrogen sulfide Hydroperoxyl Iron cyanide Isoformyl Magnesium cyanide Magnesium isocyanide Methylene radical Nitrous oxide Nitroxyl Ozone Phosphaethyne Potassium cyanide Protonated molecular hydrogen Sodium cyanide Sodium hydroxide Silicon carbonitride c - Silicon dicarbide Silicon naphthalocyanine Sulfur dioxide Thioformyl Thioxoethenylidene Titanium dioxide Tricarbon Water Four atoms Acetylene Ammonia Cyanic acid Cyanoethynyl Cyclopropynylidyne Formaldehyde Fulminic acid HCCN Hydrogen peroxide Hydromagnesium isocyanide Isocyanic acid Isothiocyanic acid Ketenyl Methylene amidogen Methyl radical Propynylidyne Protonated carbon dioxide Protonated hydrogen cyanide Silicon tricarbide Thioformaldehyde Tricarbon monoxide Tricarbon sulfide Thiocyanic acid Five atoms Ammonium ion Butadiynyl Carbodiimide Cyanamide Cyanoacetylene Cyanoformaldehyde Cyanomethyl Cyclopropenylidene Formic acid Isocyanoacetylene Ketene Methane Methoxy radical Methylenimine Propadienylidene Protonated formaldehyde Protonated formaldehyde Silane Silicon - carbide cluster Six atoms Acetonitrile Cyanobutadiynyl radical E-Cyanomethanimine Cyclopropenone Diacetylene Ethylene Formamide HC N Ketenimine Methanethiol Methanol Methyl isocyanide Pentynylidyne Propynal Protonated cyanoacetylene Seven atoms Acetaldehyde Acrylonitrile Vinyl cyanide Cyanodiacetylene Ethylene oxide Hexatriynyl radical Methylacetylene Methylamine Methyl isocyanate Vinyl alcohol Eight atoms Acetic acid Aminoacetonitrile Cyanoallene Ethanimine Glycolaldehyde Heptatrienyl radical Hexapentaenylidene Methylcyanoacetylene Methyl formate Propenal Nine atoms Acetamide Cyanohexatriyne Cyanotriacetylene Dimethyl ether Ethanol Methyldiacetylene Octatetraynyl radical Propene Propionitrile Ten atoms or more Acetone Benzene Buckminsterfullerene ( C fullerene, buckyball ) C fullerene Cyanodecapentayne Cyanopentaacetylene Cyanotetra - acetylene Ethylene glycol Ethyl formate Methyl acetate Methyl - cyano - diacetylene Methyltriacetylene Propanal n - Propyl cyanide Pyrimidine Deuterated molecules Ammonia Ammonium ion Formaldehyde Formyl radical Heavy water Hydrogen cyanide Hydrogen deuteride Hydrogen isocyanide Methylacetylene Trihydrogen cation Unconfirmed Anthracene Dihydroxyacetone Ethyl methyl ether Glycine Graphene H NCO Linear C Naphthalene cation Phosphine Pyrene Silylidine Related Abiogenesis Astrobiology Astrochemistry Atomic and molecular astrophysics Chemical formula Circumstellar envelope Cosmic dust Cosmic ray Cosmochemistry Diffuse interstellar band Earliest known life forms Extraterrestrial life Extraterrestrial liquid water Forbidden mechanism Helium hydride ion Homochirality Intergalactic dust Interplanetary medium Interstellar medium Photodissociation region Iron -- sulfur world theory Kerogen Molecules in stars Nexus for Exoplanet System Science Organic compound Outer space PAH world hypothesis Panspermia Polycyclic aromatic hydrocarbon ( PAH ) RNA world hypothesis Spectroscopy Tholin Book : Chemistry Category : Astrochemistry Category : Molecules Portal : Astrobiology Portal : Astronomy Portal : Chemistry Retrieved from `` https://en.wikipedia.org/w/index.php?title=Aluminium_hydroxide&oldid=804922183 '' Categories : Aluminium compounds Antacids Hydroxides Inorganic compounds Phosphate binders Hidden categories : Use British English from June 2017 ECHA InfoCard ID from Wikidata Articles with changed InChI identifier Chembox having GHS data Articles containing unverified chemical infoboxes All articles with unsourced statements Articles with unsourced statements from July 2017 Articles needing more detailed references Articles with unsourced statements from June 2017 Use dmy dates from July 2011 Talk Contents About Wikipedia Català Čeština Dansk Deutsch Ελληνικά Español فارسی Français Gaeilge Galego 한국어 Bahasa Indonesia Italiano Қазақша Latviešu Magyar Bahasa Melayu Nederlands 日本 語 Polski Português Română Русский Slovenčina Slovenščina Српски / srpski Srpskohrvatski / српскохрватски Suomi Svenska తెలుగు ไทย Українська Tiếng Việt 中文 Edit links This page was last edited on 11 October 2017, at 23 : 12. 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Question: is aluminum hydroxide a solid liquid or gas
Answer: solid