ثلاثي أكسيد الأنتيمون

Antimony(III) oxide
الأسماء
	اسم أيوپاك Antimony(III) oxide
	أسماء أخرى Antimony sesquioxide; Antimonous oxide; Flowers of Antimony
Identifiers
رقم CAS
3D model (JSmol)	Interactive image;
ChemSpider	25727 ;
ECHA InfoCard	100.013.796
رقم EC	215-474-6;
KEGG	C19192 ;
PubChem CID	14794;
رقم RTECS	CC5650000;
UNII	P217481X5E ;
CompTox Dashboard (EPA)	DTXSID4023880 ;
InChI	InChI={{{value}}}
SMILES
الخصائص
الصيغة الجزيئية	Sb2O3
كتلة مولية	291.518 g/mol
المظهر	white solid
الرائحة	odorless
الكثافة	5.2 g/cm3, α-form ; 5.67 g/cm3 β-form
نقطة الانصهار
نقطة الغليان
قابلية الذوبان في الماء	370±37 μg/L between 20.8 °C and 22.9 °C
قابلية الذوبان	soluble in acid
القابلية المغناطيسية	−69.4×10−6 cm3/mol
معامل الانكسار (nD)	2.087, α-form ; 2.35, β-form
البنية
البنية البلورية	cubic (α) < 570 °C; orthorhombic (β) > 570 °C
هندسة; إحداثية	pyramidal
Dipole moment	zero
المخاطر
ن.م.ع. مخطط تصويري
ن.م.ع. كلمة الاشارة	Warning
ن.م.ع. عبارات المخاطر	H351
ن.م.ع. العبارات الاحتياطية	P281
NFPA 704 (معيـَّن النار)	0 2 0
	الجرعة أو التركيز القاتل (LD, LC):
LD50 (الجرعة الوسطى)	7000 mg/kg, oral (rat)
	حدود التعرض الصحية بالولايات المتحدة (NIOSH):
PEL (المسموح)	TWA 0.5 mg/m3 (as Sb)
REL (الموصى به)	TWA 0.5 mg/m3 (as Sb)
مركبات ذا علاقة
أنيونات أخرى	Antimony trisulfide; Antimony triselenide; Antimony telluride
كاتيونات أخرى	Dinitrogen trioxide; Phosphorus trioxide; Arsenic trioxide; Bismuth trioxide
مركـّبات ذات علاقة	Diantimony tetraoxide; Antimony pentoxide
	ما لم يُذكر غير ذلك، البيانات المعطاة للمواد في حالاتهم العيارية (عند 25 °س [77 °ف]، 100 kPa).
	verify (what is ?)
	مراجع الجدول

Antimony(III) oxide is the inorganic compound with the formula Sb₂O₃. It is the most important commercial compound of antimony. It is found in nature as the minerals valentinite and senarmontite.^[3] Like most polymeric oxides, Sb₂O₃ dissolves in aqueous solutions with hydrolysis. A mixed arsenic-antimony oxide occurs in nature as the very rare mineral stibioclaudetite.^[4]^[5]

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Production and properties

Global production of antimony(III) oxide in 2012 was 130,000 tonnes, an increase from 112,600 tonnes in 2002. China produces the largest share followed by US/Mexico, Europe, Japan and South Africa and other countries (2%).^[6]

As of 2010, antimony(III) oxide was produced at four sites in the EU. It is produced via two routes, re-volatilizing of crude antimony(III) oxide and by oxidation of antimony metal. Oxidation of antimony metal dominates in Europe. Several processes for the production of crude antimony(III) oxide or metallic antimony from virgin material. The choice of process depends on the composition of the ore and other factors. Typical steps include mining, crushing and grinding of ore, sometimes followed by froth flotation and separation of the metal using pyrometallurgical processes (smelting or roasting) or in a few cases (e.g. when the ore is rich in precious metals) by hydrometallurgical processes. These steps do not take place in the EU but closer to the mining location.

Re-volatilizing of crude antimony(III) oxide

Step 1) Crude stibnite is oxidized to crude antimony(III) oxide using furnaces operating at approximately 500 to 1,000 °C. The reaction is the following:

2 Sb₂S₃ + 9 O₂ → 2 Sb₂O₃ + 6 SO₂

Step 2) The crude antimony(III) oxide is purified by sublimation.

Oxidation of antimony metal

Antimony metal is oxidized to antimony(III) oxide in furnaces. The reaction is exothermic. Antimony(III) oxide is formed through sublimation and recovered in bag filters. The size of the formed particles is controlled by process conditions in furnace and gas flow. The reaction can be schematically described by:

4 Sb + 3 O₂ → 2 Sb₂O₃

Properties

Antimony(III) oxide is an amphoteric oxide. It dissolves in aqueous sodium hydroxide solution to give the meta-antimonite NaSbO₂, which can be isolated as the trihydrate. Antimony(III) oxide also dissolves in concentrated mineral acids to give the corresponding salts, which hydrolyzes upon dilution with water.^[7] With nitric acid, the trioxide is oxidized to antimony(V) oxide.^[8]

When heated with carbon, the oxide is reduced to antimony metal. With other reducing agents such as sodium borohydride or lithium aluminium hydride, the unstable and very toxic gas stibine is produced.^[9] When heated with potassium bitartrate, a complex salt potassium antimony tartrate, KSb(OH)₂·C₄H₂O₆, is formed.^[8]

Structure

The structure of Sb₂O₃ depends on the temperature of the sample. Dimeric Sb₄O₆ is the high temperature (1560 °C) gas.^[10] Sb₄O₆ molecules are bicyclic cages, similar to the related oxide of phosphorus(III), phosphorus trioxide.^[11] The cage structure is retained in a solid that crystallizes in a cubic habit. The Sb–O distance is 197.7 pm and the O–Sb–O angle of 95.6°.^[12] This form exists in nature as the mineral senarmontite.^[11] Above 606 °C, the more stable form is orthorhombic, consisting of pairs of -Sb-O-Sb-O- chains that are linked by oxide bridges between the Sb centers. This form exists in nature as the mineral valentinite.^[11]


Sb₄O₆	senarmontite	valentinite

Uses

The annual consumption of antimony(III) oxide in the United States and Europe is approximately 10,000 and 25,000 tonnes, respectively. The main application is as flame retardant synergist in combination with halogenated materials. The combination of the halides and the antimony is key to the flame-retardant action for polymers, helping to form less flammable chars. Such flame retardants are found in electrical apparatuses, textiles, leather, and coatings.^[13]

Other applications:

Antimony(III) oxide is an opacifying agent for glasses, ceramics and enamels.
Some specialty pigments contain antimony.
Antimony(III) oxide is a useful catalyst in the production of polyethylene terephthalate (PET plastic) and the vulcanization of rubber.

Safety

Antimony(III) oxide has suspected carcinogenic potential for humans.^[13] Its TLV is 0.5 mg/m³, as for most antimony compounds.^[14] Before 2021, no other human health hazards were identified for antimony(III) oxide, and no risks to human health and the environment were identified from the production and use of antimony trioxide in daily life. However, the 15th Report on Carcinogens released on December 21, 2021, by the US Department of Health and Human Services categorised antimony(III) oxide as carcinogenic.^[15]

References

^ ^أ ^ب ^ت ^ث قالب:GESTIS
^ ^أ ^ب NIOSH Pocket Guide to Chemical Hazards 0036
^ Greenwood, N. N.; & Earnshaw, A. (1997). Chemistry of the Elements (2nd Edn.), Oxford:Butterworth-Heinemann. ISBN 0-7506-3365-4.
^ "Stibioclaudetite".
^ "List of Minerals". 21 March 2011.
^ European Union Risk Assessment Report: DIANTIMONY TRIOXIDE (draft). Sweden. November 2008. CAS No: 1309-64-4; EINECS No: 215-175-0. Archived from the original. You must specify the date the archive was made using the |archivedate= parameter. http://esis.jrc.ec.europa.eu/doc/risk_assessment/REPORT/datreport415.pdf.
^ Housecroft, C. E.; Sharpe, A. G. (2008). "Chapter 15: The group 15 elements". Inorganic Chemistry (3rd ed.). Pearson. p. 481. ISBN 978-0-13-175553-6.
^ ^أ ^ب Patnaik, P. (2002). Handbook of Inorganic Chemicals. McGraw-Hill. p. 56. ISBN 0-07-049439-8.
^ Bellama, J. M.; MacDiarmid, A. G. (1968). "Synthesis of the Hydrides of Germanium, Phosphorus, Arsenic, and Antimony by the Solid-Phase Reaction of the Corresponding Oxide with Lithium Aluminum Hydride". Inorganic Chemistry. 7 (10): 2070–2072. doi:10.1021/ic50068a024.
^ Wiberg, E.; Holleman, A. F. (2001). Inorganic Chemistry. Elsevier. ISBN 0-12-352651-5.
^ ^أ ^ب ^ت Wells, A. F. (1984). Structural Inorganic Chemistry. Oxford: Clarendon Press. ISBN 0-19-855370-6.
^ Svensson, C. (1975). "Refinement of the crystal structure of cubic antimony(III) oxide, Sb₂O₃". Acta Crystallographica B. 31 (8): 2016–2018. doi:10.1107/S0567740875006759.
^ ^أ ^ب Grund, S. C.; Hanusch, K.; Breunig, H. J.; Wolf, H. U. "Antimony and Antimony Compounds". Ullmann's Encyclopedia of Industrial Chemistry. Weinheim: Wiley-VCH. doi:10.1002/14356007.a03_055.pub2. {{cite encyclopedia}}: Cite has empty unknown parameter: |authors= (help)
^ Newton, P. E.; Schroeder, R. E.; Zwick, L.; Serex, T. (2004). "Inhalation Developmental Toxicity Studies In Rats With Antimony(III) oxide (Sb₂O₃)". Toxicologist. 78 (1–S): 38.
^ "15th Report on Carcinogens". National Toxicology Program (in الإنجليزية). Retrieved 2023-06-15.

External links

[GESTIS-1] أ ^ب ^ت ^ث قالب:GESTIS

[PGCH-2] أ ^ب NIOSH Pocket Guide to Chemical Hazards 0036

[3] Greenwood, N. N.; & Earnshaw, A. (1997). Chemistry of the Elements (2nd Edn.), Oxford:Butterworth-Heinemann. ISBN 0-7506-3365-4.

[4] "Stibioclaudetite".

[5] "List of Minerals". 21 March 2011.

[6] European Union Risk Assessment Report: DIANTIMONY TRIOXIDE (draft). Sweden. November 2008. CAS No: 1309-64-4; EINECS No: 215-175-0. Archived from the original. You must specify the date the archive was made using the |archivedate= parameter. http://esis.jrc.ec.europa.eu/doc/risk_assessment/REPORT/datreport415.pdf.

[InorgChem-7] Housecroft, C. E.; Sharpe, A. G. (2008). "Chapter 15: The group 15 elements". Inorganic Chemistry (3rd ed.). Pearson. p. 481. ISBN 978-0-13-175553-6.

[Handbook-8] أ ^ب Patnaik, P. (2002). Handbook of Inorganic Chemicals. McGraw-Hill. p. 56. ISBN 0-07-049439-8.

[9] Bellama, J. M.; MacDiarmid, A. G. (1968). "Synthesis of the Hydrides of Germanium, Phosphorus, Arsenic, and Antimony by the Solid-Phase Reaction of the Corresponding Oxide with Lithium Aluminum Hydride". Inorganic Chemistry. 7 (10): 2070–2072. doi:10.1021/ic50068a024.

[Wiberg&Holleman-10] Wiberg, E.; Holleman, A. F. (2001). Inorganic Chemistry. Elsevier. ISBN 0-12-352651-5.

[Wells-11] أ ^ب ^ت Wells, A. F. (1984). Structural Inorganic Chemistry. Oxford: Clarendon Press. ISBN 0-19-855370-6.

[12] Svensson, C. (1975). "Refinement of the crystal structure of cubic antimony(III) oxide, Sb₂O₃". Acta Crystallographica B. 31 (8): 2016–2018. doi:10.1107/S0567740875006759.

[Ullmann-13] أ ^ب Grund, S. C.; Hanusch, K.; Breunig, H. J.; Wolf, H. U. "Antimony and Antimony Compounds". Ullmann's Encyclopedia of Industrial Chemistry. Weinheim: Wiley-VCH. doi:10.1002/14356007.a03_055.pub2. {{cite encyclopedia}}: Cite has empty unknown parameter: |authors= (help)

[14] Newton, P. E.; Schroeder, R. E.; Zwick, L.; Serex, T. (2004). "Inhalation Developmental Toxicity Studies In Rats With Antimony(III) oxide (Sb₂O₃)". Toxicologist. 78 (1–S): 38.

[15] "15th Report on Carcinogens". National Toxicology Program (in الإنجليزية). Retrieved 2023-06-15.

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