Description
Sodium Thiosulfate commonly used in Dechlorination of municipal wastewater, pulp & paper, power, and textile water treatment plants and as an Oxygen scavenger in oil well drilling process in Mining industries. Also chemically suitable for Aluminium cation reaction.
Sodium Thiosulfate used as a Pond / Aquarium Dechlorinator. But Sodium Thiosulfate does not treat for Chloramine, only Chlorine. Chloramine is a chemical compound composed of chlorine and ammonia and more and more utilities are converting to its use. Check with your municipal water company to learn which chemical they are using. If Chloramine is the disinfectant, please research other knowledgeable sources to learn your best solution for water treatment.
Molecular Formula ::: Na2S2O3 – 5H2O
This product also used as a Photography as a fixing agent (hypo) to dissolve unchanged silver salts from exposed negatives.
Technical Bulletin
Label
IUPAC name : ………………………………………………………………. Sodium thiosulfate
Other names:………………………………………………………………… Sodium hyposulfite ,Hyposulphite of soda
Identifiers
CAS number : …………………………………………………………………. 7772-98-7 Y,
10102-17-7 : ……………………………………………………………………. (pentahydrate)
PubChem:……………………………………………………………………….. 24477
ChemSpider : ………………………………………………………………….. 22885 Y
UNII :……………………………………………………………………………… L0IYT1O31N Y
ChEMBL CHEMBL : ………………………………………………………….. 1201157 N
RTECS number : ………………………………………………………………. XN6476000
LABEL PROPERTY
Physical state and appearance: …………………………………………………………………… Solid.
Odor: ……………………………………………………………………………………………………. Odorless.
Taste: ……………………………………………………………………………………………………. Saline.
Molecular Weight:……………………………………………………………………………………… 248.19 g/mole
Color:……………………………………………………………………………………………………… Colorless. White.
pH (1% soln/water):……………………………………………………………………………………. pH of a 5% solution: 6.0-8.4
Boiling Point:…………………………………………………………………………………………….. >100°C (212°F)
Melting Point:……………………………………………………………………………………………. 48°C (118.4°F)
Critical Temperature: …………………………………………………………………………………… Not available.
Specific Gravity:…………………………………………………………………………………………. 1.7 -1.75(Water = 1)
Vapor Pressure:…………………………………………………………………………………………. Not applicable.
Vapor Density: ………………………………………………………………………………………….. Not available.
Volatility:…………………………………………………………………………………………………… Not available.
Odor Threshold: ………………………………………………………………………………………….. Not available.
Water/Oil Dist. Coeff.:……………………………………………………………………………………. Not available.
Ionicity (in Water):………………………………………………………………………………………… Not available.
Dispersion Properties: ………………………………………………………………………………….. See solubility in water.
Solubility:…………………………………………………………………………………………………… Soluble in cold water, hot water. Solubility in water: 79 g/100 ml @ 4 deg. C (39 deg. F) 680 g/liter @ 20 deg. C
