Sodium Thiosulfate CAS#7772-98-7
Strong Reducing Properties
Sodium metabisulfite is a powerful reducing agent, widely applied in food preservation and industrial processing.High Water Solubility
It dissolves readily in water (231 g/100 mL at 100 °C), allowing for easy formulation in aqueous systems.Effective Preservative
Its antimicrobial action makes it ideal for preserving food and extending shelf life.Deliquescent Nature
Its ability to absorb moisture enables specific humidity-regulating applications when properly controlled.
Sodium metabisulfite is a colorless monoclinic crystal or a white crystalline powder, typically odorless with a slightly salty taste. Its relative density is 1.667, and it is highly soluble in water, with a solubility of 231 g per 100 ml of water at 100°C. However, it is insoluble in alcohol. This compound has a strong tendency to absorb moisture from the air, making it deliquescent. It also exhibits powerful reductive properties and decomposes when in contact with acidic solutions.
Sodium metabisulfite is commonly used as a reducing agent and preservative in various industrial and food applications. Due to its reactive nature, it must be stored in a dry, well-ventilated environment to prevent it from absorbing moisture and decomposing. Proper handling precautions should be taken to avoid exposure to its potentially harmful fumes, especially when working with acidic solutions.
Parameters
Melting point | 48°C |
Boiling point | 100°C |
bulk density | 1350kg/m3 |
density | 1.01 g/mL at 25 °C |
storage temp. | Store at +5°C to +30°C. |
solubility | Immiscible with alcohol. |
form | Solid |
Specific Gravity | 1.667 |
color | White |
PH | 6.0-8.5 (25℃, 50mg/mL in H2O) |
Water Solubility | Soluble in water. Insoluble in alcohol. |
Sensitive | Hygroscopic |
Merck | 14,8694 |
Stability: | Stable. Incompatible with strong acids, strong oxidizing agents, iodine, mercury. |
InChIKey | AKHNMLFCWUSKQB-UHFFFAOYSA-L |
LogP | -0.428 (est) |
CAS DataBase Reference | 7772-98-7(CAS DataBase Reference) |
EPA Substance Registry System | Sodium thiosulfate (7772-98-7) |
Safety Information
Hazard Codes | Xi |
Risk Statements | 36/37/38 |
Safety Statements | 24/25-23-36-26 |
WGK Germany | 1 |
RTECS | XN6476000 |
F | 3 |
TSCA | Yes |
HS Code | 28323000 |
Hazardous Substances Data | 7772-98-7(Hazardous Substances Data) |
Toxicity | LD50 orally in Rabbit: > 5000 mg/kg |
