Sodium Thiosulfate CAS No.10102-17-7, also known as hypo, is a colorless and transparent crystal.

How to produce Sodium Thiosulfate?

1.Boil sodium sulfite and sulfur to obtain sodium thiosulfate, which is then refined by recrystallization.

Na2SO3 + S + 5H2O = Na2S2O3·5H2O

2. After dissolving soda ash, it reacts with sulfur dioxide (generated by sulfur combustion) to generate sodium sulfite, and then adds sulfur for boiling reaction. After filtration, concentration, and crystallization, sodium thiosulfate is obtained. Sodium Thiosulfate.

Na2CO3+SO2==Na2SO3+CO2

Na2SO3+S+5H2O==Na2S2O3.5H2O

3.React the alkali sulfide evaporation residue, sodium carbonate and sodium sulfide in the barium sulfide wastewater with the sulfur dioxide in the sulfur waste gas, and then absorbing sulfur, evaporating and crystallizing it.

2Na2S+Na2CO3+4SO2==3Na2S2O3+CO2

Sodium Thiosulfate CAS No.10102-17-7 USAGE
As a photographic fixative. which is able to form stable complexes with silver bromide, allowing it to play a role in the fixing process.

Baking soda (sodium thiosulfate) has many uses in aquaculture, including:
Adjust water quality:
It can increase the pH value of water, helping to maintain a suitable pH level and creating a more comfortable living environment for fish.
It can improve water hardness, increase water hardness, and help certain aquatic organisms.
Promote algae growth:
It can provide the carbon source needed for algae growth, help algae reproduce, increase the amount of dissolved oxygen in the water, and provide natural food for fish.
Reduce ammonia nitrogen toxicity:
In aquaculture, fish excrement produces ammonia nitrogen, and baking soda can reduce the toxicity of ammonia nitrogen through chemical reactions.
Disinfection and sterilization:
At a certain concentration, sodium soda has a certain disinfection and sterilization effect and can clean breeding water bodies.

Remove heavy metals:
Baking soda can react with heavy metal ions in the water to form insoluble precipitates, thereby reducing the toxicity of heavy metals to aquatic organisms.
Promote calcium absorption:
Adding an appropriate amount of soda to aquaculture water can help aquatic organisms better absorb calcium and promote the development of bones and shells.
Stable water quality:
Baking soda can reduce the content of suspended solids in water, making the water clearer and more stable.
When using soda, it is necessary to reasonably control the dosage according to the specific breeding conditions and water quality to avoid deterioration of water quality caused by excessive use.The water quality requirements of different aquatic organisms, ensure that the use of soda will not have adverse effects on them. In practical applications, it is recommended to consult professional aquaculture technicians.

It also have other usage, such as,reducing agents, bleaching and dyeing dechlorination agents, sulfur dyes, anti-whitening agents, disinfectants and fading agents, pesticides, mineral processing, construction and other industries.