Sodium Thiosulphate Pentahydrate CAS No. 7772-98-7 Hypo Chemical

Min.Order: 22

Product origin: Qingdao, Shandong, China

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US$ 320 ~ 340

Description

Sodium Thiosulphate

CAS NO. : 7772-98-7
EINECS No. : 231-867-5
Molecular Formula: Na2S2O3·5H2O
Molecular Weight : 248.18
HS CODE : 2832300000

Synonyms:
Thiosulfate, Sodium hyposulfite , Hypo, Sodium Thiosulfite, Sodium Thiosulfat,Sodium Hyposulfite Anhydrous,
Anhydrous sodium thiosulfate, Detoxol

Physical property:
Melting point: 40 ~ 45 ºC. Relative Density:1.729 (17 ºC).
Colorless monoclinic crystal.
It is odorless and has a cool bitter taste.Heat to 100 ºC and lose 5 crystal water.
It is easily soluble in water and the aqueous solution is nearly neutral.
Soluble in turpentine and ammonia. Insoluble in alcohol. Deliquescent in humid air.
It is easily weathered in dry air above 3 ºC.
It has reducibility and can dissolve halogen and silver salt.

Specification:

ITEM	STANDARD
Purity (Na2S2O3 .5H2O)	99%min
Water Insoluble Substance	0.01%max
Sulfide (Based on Na2S)	0.001%max
Iron (Fe)	0.001%max
PH (200g/L solution)	6.5-9.5
Appearance	Colorless transparent crystal

Application:
-Photographic Processing:
Sodium thiosulfate is also used as a fixer in photography. The negative plate or film obtained at the end of photographic development with a reducing agent (i.e., potassium ferrous oxalate, pyrogallol) contains Ag, Br which has not been light-activated and reduced to Ag metal. This is treated with sodium thiosulfate solution so that Ag, Br is removed as a soluble complex compound. This process is known as "fixing" of the negative plate or film.
-Water treatment industry : as water purifying agent
-Paper industry : as dechlorination agent
-Healthcare:
Sodium thiosulfate is used to treat arsenic poisoning, primarily because it is relatively inexpensive and non-toxic. Sodium thiosulfate is proven to be effective in the treatment of copper poisoning when it is applied together with sodium molybdate. It has been also recommended in the treatment of cyanide poisoning.
-Gold Extraction:
Sodium thiosulfate is employed in the extraction of gold and silver. Sodium thiosulfate forms a strong complex compound during reactions with gold and silver. The newly formed substances are highly soluble in water, so the target metals (gold and silver) can be leached by thiosulfate.
-Aquaculture:
Sodium thiosulfate is used as a dechlorination agent in neutralizing chlorine and iodine solutions at aquaculture or hatchery facilities. Chlorine is a toxic element, and excess chlorine could be harmful to fish and crustaceans, so it is important to remove chlorine by disinfecting tanks and equipment using sodium thiosulfate before introducing the stock
-Textile industry:
Sodium thiosulfate is applied as an antichlor to remove excess chlorine from bleached articles in the textile industry.

Production line of Workshop of Sodium Thiosulphate (Pentahydrate)

Packing: 50kgs net PP woven bag
Quantity: 1FCL 22mt with pallets

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