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Ammonium thiosulfate

Description Toxicity References
Ammonium thiosulfate
Ammonium thiosulfate structure
Chemical Name:
Ammonium thiosulfate
amthio;ammohypo;thio-sul;Ammoniumthiosulfat;AMMONIUM THIOSULFATE;AMMONIUM HYPOSULFITE;ammonium thiosulate ;Ammonuim thiosulfite;AMMONIUM THIOSULPHATE;Aminonium Thiosulfate
Molecular Formula:
Formula Weight:
MOL File:

Ammonium thiosulfate Properties

Melting point:
150 °C (lit.)
1.679 g/mL at 25 °C (lit.)
H2O: very soluble(lit.)
Crystalline Powder
Ammonical odour
Water Solubility 
Soluble in water, slightly soluble in acetone. Insoluble in ethanol and diethyl ether.
Stable. Hygroscopic.
CAS DataBase Reference
7783-18-8(CAS DataBase Reference)
Indirect Additives used in Food Contact Substances
175.105; 176.170
EPA Substance Registry System
Ammonium thiosulfate (7783-18-8)
  • Risk and Safety Statements
Hazard statements  H303
Risk Statements  33-36/37/38
Safety Statements  26-37
WGK Germany  1
RTECS  XN6465000
HS Code  28323000
Toxicity LD50 orl-rat: 2890 mg/kg GTPZAB 26(6),54,82

Ammonium thiosulfate price More Price(5)

Manufacturer Product number Product description CAS number Packaging Price Updated Buy
Sigma-Aldrich 336726 Ammonium thiosulfate 98% 7783-18-8 500g $48.7 2021-03-22 Buy
Sigma-Aldrich 336726 Ammonium thiosulfate 98% 7783-18-8 2.5kg $196 2021-03-22 Buy
Alfa Aesar A10190 Ammonium thiosulfate, 98+% 7783-18-8 100g $24.5 2020-06-24 Buy
Alfa Aesar A10190 Ammonium thiosulfate, 98+% 7783-18-8 500g $44 2020-06-24 Buy
Alfa Aesar A10190 Ammonium thiosulfate, 98+% 7783-18-8 2500g $150 2020-06-24 Buy

Ammonium thiosulfate Chemical Properties,Uses,Production


Ammonium thiosulfate is an inorganic compound. It is white crystalline solid with ammonia odor, readily soluble in water, slightly soluble in acetone and insoluble in ethanol and diethyl ether. And Ammonium thiosulfate is used in photographic fixer. It is a so-called rapid fixer, acting more quickly than sodium thiosulfate fixers. Fixation involves these chemical reactions (illustrated for silver bromide). Ammonium thiosulfate is also used for leaching of gold and silver. It works with presence of copper as a catalyst here. This process is a nontoxic alternative gold cyanidation. Ammonium thiosulfate can be used as a fertilizer. As suggested by some research studies it can be used as an additive to coal-waste mixtures to reduce formation of very dangerous dioxins and furans.
Methods of Manufacturing
Direct reaction of ammonium sulfite with sulfur. Besides,the ATS process, sulfur dioxide is absorbed from incinerated Claus tail gas in aqueous ammonia to produce ammonium sulfate and ammonium bisulfite in solution. The solution passes to a converter where it flows countercurrent to hydrogen sulfide. Ammonium thiosulfate forms /in solution and/ is concentrated to 60 wt%.


Ammonium thiosulfate exists as colorless, monoclinic or white crystals with ammonia like odor. It is very soluble in cold water; slightly soluble in acetone and insoluble in alcohol and ether. It is used to clean white metal; in lubricants for metal cold working, as an analytical reagent; fungicide, reducing agent; brightener in silver plating bath, and in hair waving preparations; fog screens, and cleaning compounds for zinc base die cast metals and it is used as a desiccant and defoliant in crop bearing plants. Inhalation of dust may irritate respiratory system. Contact with eyes or skin may cause irritation. Ingestion may be harmful.



Chemical Properties

white or colourless crystals

Chemical Properties

Ammonium thiosulfate is a white crystalline solid with an ammonia odor.

Physical properties

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.


To clean "white" metal; in photography; in lubricants for metal cold-working.

General Description

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 Reactions

Hygroscopic. Very soluble in water.

Reactivity Profile

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.

Fire Hazard

Special Hazards of Combustion Products: Toxic ammonia, hydrogen sulfide, and oxides of nitrogen and sulfur may form in fires.

Agricultural Uses

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 (SO42-) 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.

Safety Profile

Moderately toxic by ingestion.When heated to decomposition it emits toxic vapors ofNH4- and SOx.

Potential Exposure

Used as an agricultural chemical and fungicide, metal lubricant; in cleaning metals; in photographic chemicals, making other chemicals. A laboratory reagent.


UN3077 Environmentally hazardous substances, solid, n.o.s., Hazard class: 9; Labels: 9-Miscellaneous hazardous material, Technical Name Required.


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 Preparation Products And Raw materials

Raw materials

Preparation Products

Ammonium thiosulfate Suppliers

Global( 205)Suppliers
Supplier Tel Fax Email Country ProdList Advantage
Henan Tianfu Chemical Co.,Ltd.
0371-55170693 CHINA 22607 55
Hefei TNJ Chemical Industry Co.,Ltd.
86-0551-65418684 18949823763
86-0551-65418684 China 3001 55
career henan chemical co
+86-371-86658258 CHINA 29961 58
Hubei Jusheng Technology Co.,Ltd.
027-59599243 CHINA 28229 58
Hubei xin bonus chemical co. LTD
027-59338440 CHINA 23035 58
Shandong chuangyingchemical Co., Ltd.
18853181302 CHINA 5917 58
Shanghai Longyu Biotechnology Co., Ltd.
+8615821988213 CHINA 2462 58
Chongqing Chemdad Co., Ltd
+86-13650506873 CHINA 37282 58
Antai Fine Chemical Technology Co.,Limited
18503026267 CHINA 9664 58
Zhengzhou Alfa Chemical Co.,Ltd
+86 13343822234;;; CHINA 15027 58

View Lastest Price from Ammonium thiosulfate manufacturers

Image Release date Product Price Min. Order Purity Supply Ability Manufacturer
2019-08-08 Ammonium thiosulfate
US $3.00 / KG 1KG 99% 100kg career henan chemical co

Ammonium thiosulfate Spectrum

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