Sodium thiosulfate
Sodium thiosulfate
CAS: 7772-98-7
Molecular Formula: Na2S2O3
Sodium thiosulfate - Names and Identifiers
| Name | Sodium thiosulfate |
| Synonyms | hypo hyporice betz 0235 sodium subsulfite sodium hyposulfite Sodium thiosulfate sodi-um hyposulfide sulfurothioic O,O-acid hydrogen sulfurothioate dechlorinating solution sodium thiosulfate anydrous thiopivalic acid sodium salt thiosulfuric acid, disodium salt thiosulfuric acid (h2s2o3), disodium salt |
| CAS | 7772-98-7 |
| EINECS | 231-867-5 |
| InChI | InChI=1/H2O3S2/c1-5(2,3)4/h(H2,1,2,3,4)/p-1 |
Sodium thiosulfate - Physico-chemical Properties
| Molecular Formula | Na2S2O3 |
| Molar Mass | 158.11 |
| Melting Point | 48℃ |
| Boling Point | 100℃ |
| Appearance | White crystal |
| Storage Condition | Room Temprature |
| Sensitive | Easily absorbing moisture |
| MDL | MFCD00003499 |
| Physical and Chemical Properties | Melting Point: 48°C |
| Use | It is used as a chlorine scavenger after bleaching of pulp and cotton, as a chelating agent and antioxidant in the food industry, and as a detergent and disinfectant in the pharmaceutical industry. |
Sodium thiosulfate - Risk and Safety
| Safety Description | S24/25 - Avoid contact with skin and eyes. |
Sodium thiosulfate - Upstream Downstream Industry
Sodium thiosulfate - Reference
| Reference Show more | 1. Wen, Yun-Qi, et al. "Application of plackett–burman design in screening of natural antioxidants suitable for anchovy oil." Antioxidants 8.12 (2019): 627.https://doi.org/10.3390/antiox8120627 2. [IF=2.1] Baoxin Wang et al."Neurotrophin expression and laryngeal muscle pathophysiology following recurrent laryngeal nerve transection."Mol Med Rep. 2016 Feb;13(2):1234-1242 3. [IF=4.952] Yun-Qi Wen et al."Recombination of oxidized samples of DHA and purified sunflower oil reproduces the odor profile of impaired algae oil from Schizochytrium sp. and reveals the odor contribution of fatty acids other than DHA."Lwt Food Sci Technol. 2022 Apr |
Sodium thiosulfate - Nature
Open Data Verified Data
colorless monoclinic crystals. Odorless, with a cool and bitter taste. The relative density was 1. 729(17 ℃). The melting point was 40-45 °c. Five crystals of water were lost by heating to 1 00 °c. Soluble in water, near neutral aqueous solution. Soluble in turpentine and ammonia. Insoluble in alcohol. Deliquescence in moist air. Weathering in dry air above 3 and 3 ℃. With reducing, can dissolve halogen and silver salt.
Last Update：2024-01-02 23:10:35
Sodium thiosulfate - Preparation Method
Open Data Verified Data
- sodium sulfite method: Dissolve soda ash with water, react soda ash solution with sulfur dioxide gas, add caustic soda neutralization, add sulfide alkali to remove impurities, filter, and then dissolve sulfur yellow powder in hot sodium sulfite solution for reaction. After filtering, removing impurities, filtering again, adding caustic soda for processing, after concentration, filtration, crystallization, centrifugal dehydration, screening, prepared products.
- sulfide alkali method: the raw material liquid prepared by using sulfide alkali evaporation residue and barium sulfide wastewater (containing; Sodium carbonate and sodium sulfide) reacts with sulfur dioxide, and after clarification, sulfur powder is added for heating reaction, after evaporation, cooling crystallization, washing, separation, screening, prepared sodium thiosulfate product.
- comprehensive method: the waste of the lower leg containing sodium sulfide, sodium sulfite and a small amount of caustic soda is appropriately treated and then heated to react with sulfur, and the hot reaction solution is oxidized by air to generate sodium thiosulfate. In addition, the crude sodium sulfite plus sulfur reaction to prepare sodium thiosulfate and crude sodium thiosulfate Crystal three mixed, after decolorization, filtration, concentration, decolorization, filtration, crystallization, centrifugal dehydration, prepared sodium thiosulfate product.
- recrystallization method; Crude sodium thiosulfate Crystal dissolution (or crude sodium thiosulfate solution), after impurity removal, concentration, crystallization, prepared sodium thiosulfate.
- purified gas by-product method: the solution (containing sodium thiosulfate) in the process of arsenic alkali desulfurization of coke oven gas is used. First, the arsenic salt is precipitated with sulfuric acid and then neutralized with alkali, in addition to iron, concentrated crystallization, coarse crystal and alkali in addition to iron, recrystallization, prepared sodium thiosulfate.
Last Update：2022-01-01 11:04:31
Sodium thiosulfate - Introduction
It's odorless and salty. Soluble in water, solubility 23lg/100ml water at 100 ℃. Insoluble in alcohol. It is deliquescent in the air. It has strong reducibility and decomposes in acidic solution. Decomposition by heating
Last Update：2022-10-16 17:28:41
Sodium thiosulfate - Use
Open Data Verified Data
The photosensitive industry is used as a photographic fixing agent. The paper industry is used as a chlorine scavenger after Pulp bleaching. The dyeing and printing industry is used as a dechlorination agent for cotton fabric after bleaching. Analytical chemistry is used as a reagent for chromatographic analysis and volumetric analysis. It is used as detergent and disinfectant in medicine. The food industry is used as a chelating agent, an antioxidant, etc.
Last Update：2022-01-01 11:04:30
Sodium thiosulfate - Safety
Open Data Verified Data
double-layer packaging, packed with woven bags or barrel lined with polyethylene plastic bags. 25kg or 50kg net weight per bag (barrel). The container must be sealed. Store in a cool, dry warehouse, anti-sun, anti-rain during transport. It cannot be stored and mixed with acids and oxidants. To prevent moisture dissolution. If the packaging is wet, the contents have been shown to have a deliquescence effect and must be stacked separately from the dry packaging. It is not allowed to be stored in the open air, and the damp packaging should be handled promptly. When there is a fire, it can be suppressed by water and sand.
Last Update：2022-01-01 11:04:31
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View History
Sodium thiosulfate
NSC82348
2-BROMO-TRANS-2-BUTENE
95092-06-1
4-Methoxy-1,3-Benzothiazol-2-Amine
钛酸杆
CHEMBRDG-BB 6141133
4-Ethyl-m-xylene
Monomethylaniline
6324-70-5
NSC82348
2-BROMO-TRANS-2-BUTENE
95092-06-1
4-Methoxy-1,3-Benzothiazol-2-Amine
钛酸杆
CHEMBRDG-BB 6141133
4-Ethyl-m-xylene
Monomethylaniline
6324-70-5
Raw Materials for Sodium thiosulfate
Downstream Products for Sodium thiosulfate