Ammoniumthiosulfat

Bezeichnung:Ammoniumthiosulfat

CAS-Nr7783-18-8

Englisch Name:Ammonium thiosulfate

CBNumberCB8171755

SummenformelH8N2O3S2

Molgewicht148.21

MOL-Datei7783-18-8.mol

Synonyma

Ammoniumthiosulfat

Ammoniumthiosulfat physikalisch-chemischer Eigenschaften

Schmelzpunkt	150 °C (lit.)
Dichte	1.679 g/mL at 25 °C (lit.)
Löslichkeit	H2O: very soluble(lit.)
Aggregatzustand	Crystalline Powder
Farbe	White
Geruch (Odor)	Ammonical odour
Wasserlöslichkeit	Soluble in water, slightly soluble in acetone. Insoluble in ethanol and diethyl ether.
Sensitive	Hygroscopic
Merck	14,562
Stabilität	Stable. Hygroscopic.
InChI	InChI=1S/2H3N.H2O3S2/c;;1-5(2,3)4/h2*1H3;(H2,1,2,3,4)
InChIKey	XYXNTHIYBIDHGM-UHFFFAOYSA-N
SMILES	S(=S)(=O)(O)O.N.N
LogP	-0.428 (est)
CAS Datenbank	7783-18-8(CAS DataBase Reference)
EPA chemische Informationen	Ammonium thiosulfate (7783-18-8)

Sicherheit

R-Sätze:	33-36/37/38
S-Sätze:	26-37
WGK Germany	1
RTECS-Nr.	XN6465000
TSCA	Yes
HS Code	28323000
Giftige Stoffe Daten	7783-18-8(Hazardous Substances Data)
Toxizität	LD50 orl-rat: 2890 mg/kg GTPZAB 26(6),54,82

Gefahreninformationscode (GHS)

Ammonium thiosulfate Chemische Eigenschaften,Einsatz,Produktion Methoden

R-Sätze Betriebsanweisung:
R33:Gefahr kumulativer Wirkungen.
R36/37/38:Reizt die Augen, die Atmungsorgane und die Haut.
S-Sätze Betriebsanweisung:
S26:Bei Berührung mit den Augen sofort gründlich mit Wasser abspülen und Arzt konsultieren.
S37:Geeignete Schutzhandschuhe tragen.
Beschreibung
Ammonium thiosulfate is a white crystallinesolid with an ammonia odor. Molecular weight= 148.21;Freezing/Melting point= 150 C [decomposes ,50℃(solution); .100℃ (anhydrous crystals)]. HazardIdentification (based on NFPA-704 M Rating System):Health 1, Flammability 0, Reactivity 0. Highly soluble inwater.
Chemische Eigenschaften
white or colourless crystals
Chemische Eigenschaften
Ammonium thiosulfate is a white crystalline solid with an ammonia odor.
Physikalische Eigenschaften
Colorless, monoclinic crystal; hygroscopic; decomposes on heating above 100°C; density 1.679 g/cm₃; very soluble in water (64 g/100 g at 20°C), insoluble in alcohol, and slightly soluble in acetone.
Verwenden
Ammonium thiosulfate finds application for leaching of gold and silver since it forms strong complexes. It is widely utilized as a photographic fixing agent, which acts quicklier than sodium thiosulfate fixers. It serves as a fertilizer. It acts as an additive to coal-waste mixtures to inhibit the formation of dangerous dioxins and furans. It is used as an analytical reagent in laboratories.
Verwenden
To clean "white" metal; in photography; in lubricants for metal cold-working.
Allgemeine Beschreibung
AMMONIUM THIOSULFATE is a white crystalline solid. AMMONIUM THIOSULFATE is very soluble in water. The primary hazard is the threat posed to the environment. Immediate steps should be taken to limit its spread to the environment. AMMONIUM THIOSULFATE is used in photography, in chemical analysis, and for many other uses.
Air & Water Reaktionen
Hygroscopic. Very soluble in water.
Reaktivität anzeigen
AMMONIUM THIOSULFATE is sensitive to heat. AMMONIUM THIOSULFATE is incompatible with magnesium and aluminum powder. Mixtures with sodium chlorate can cause an exothermic reaction which can then decompose explosively. . Reacts with strong oxidizers such as chlorates, nitrates, and nitrites to release toxic ammonia, hydrogen sulfide, and sulfur trioxide gases. Will not polymerize. Ammonia, hydrogen sulfide, and oxides of nitrogen and oxides of sulfur may form in fires [USCG, 1999].
Health Hazard
Inhalation of dust may irritate respiratory system. Ingestion could be harmful. Contact with eyes or skin may cause irritation.
Brandgefahr
Special Hazards of Combustion Products: Toxic ammonia, hydrogen sulfide, and oxides of nitrogen and sulfur may form in fires.
Landwirtschaftliche Anwendung
Ammonium thiosulphate, [(NH₄)₂S₂O₃ or ATS] is a crystalline salt, the aqueous solution of which is commonly used as a liquid fertilizer. Crystalline ammonium thiosulphate contains 19% nitrogen and 43 % sulphur and its aqueous solution contains 12% nitrogen and 26 % sulphur.
Ammonium thiosulphate is compatible with nitrogen and nitrogen-potassium solutions, which are neutral or slightly acidic (pH 5.8). It is also used as a suspension: As it is non-corrosive, it can be stored in steel or aluminumdrums.
Ammonium thiosulphate is prepared by the reaction of sulphur dioxide and aqueous ammonia, followed by a further reaction with elemental sulphur.
ATS can be applied directly to soils or as a foliar spray through sprinkler irrigation systems. When applied to soils, ATS decomposes into ammonium sulphate and colloidal sulphur. The ammonium sulphate is available immediately to plants, while the sulphur gets oxidized over a period of time to sulphate ion (SO₄^2-) It is thus available to plants for a longer time. Ammonium thiosulphate also acts as a urease inhibitor. When added to a urea-ammonium nitrate solution, it inhibits urease activity for a month or so. In industry, it is also used as a photographic fixing agent, analytical reagent, fungicide and as a brightener in silverplating baths.
Sicherheitsprofil
Moderately toxic by ingestion.When heated to decomposition it emits toxic vapors ofNH4^- and SOx.
mögliche Exposition
Used as an agricultural chemical and fungicide, metal lubricant; in cleaning metals; in photographic chemicals, making other chemicals. A laboratory reagent.
Erste Hilfe
If this chemical gets into the eyes, remove anycontact lenses at once and irrigate immediately for at least15 min, occasionally lifting upper and lower lids. Seekmedical attention immediately. If this chemical contactsthe skin, remove contaminated clothing and wash immediately with soap and water. Seek medical attention immediately. If this chemical has been inhaled, remove fromexposure, begin rescue breathing (using universal precautions, including resuscitation mask) if breathing hasstopped and CPR if heart action has stopped. Transferpromptly to a medical facility. When this chemical hasbeen swallowed, get medical attention. Give large quantities of water and induce vomiting. Do not make an unconscious person vomit.
Lager
Color Code—Green: General storage may beused. Prior to working with this chemical you should betrained on its proper handling and storage. Store in tightlyclosed containers in a cool, well-ventilated area away fromoxidizers, acids, water, or combustible materials.
Versand/Shipping
UN3077 Environmentally hazardous substances, solid, n.o.s., Hazard class: 9; Labels: 9-Miscellaneous hazardous material, Technical Name Required.
Inkompatibilitäten
Contact with sodium chlorate may cause a violent reaction. Corrodes brass, copper, and copperbased metals.
Waste disposal
Incinerate. It may be possible to dispose of waste material at a municipal facility if treated, neutralized and oxidized.

Ammonium thiosulfate Upstream-Materialien And Downstream Produkte

Ammoniumthiosulfat Anbieter Lieferant Produzent Hersteller Vertrieb Händler.

7783-18-8, Ammonium thiosulfate Verwandte Suche:

Send Inquriy