Sodium Bisulfate CAS#7681-38-1
Sodium bisulfate is a white crystalline solid that is readily soluble in water. It is corrosive to both metals and biological tissues.
It is highly hygroscopic, meaning it readily absorbs moisture from the environment. In aqueous solution, sodium bisulfate fully dissociates into sodium (Na⁺), hydrogen (H⁺), and sulfate (SO₄²⁻) ions.
As a mineral acid, it is not expected to contaminate groundwater or soil, nor is it prone to bioaccumulation in the food chain, according to EPA data (1993).
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Sodium bisulfate Chemical Properties
| Melting point | 315 °C |
| density | 2.1 |
| form | Granules |
| color | White to light yellow |
| Water Solubility | soluble in 2 parts H2O, 1 part boiling H2O; decomposes in alcohol to sodium sulfate and H2SO4 [MER06] |
| Sensitive | Hygroscopic |
| Merck | 138658 |
| Stability: | Stable. Incompatible with strong bases, strong oxidizing agents, sodium carbonate, sodium hypochlorite. May decompose upon exposure to moist air or water. |
| InChI | InChI=1S/Na.H2O4S.H/c;1-5(2,3)4;/h;(H2,1,2,3,4); |
| InChIKey | TTXJTWGBBUPRBF-UHFFFAOYSA-N |
| SMILES | S(O)(O)(=O)=O.[NaH] |
| CAS DataBase Reference | 7681-38-1(CAS DataBase Reference) |
| EPA Substance Registry System | Sodium bisulfate (7681-38-1) |
| Hazard Codes | Xi |
| Risk Statements | 41 |
| Safety Statements | 24-26 |
| RIDADR | 3260 |
| WGK Germany | 1 |
| RTECS | VZ1860000 |
| F | 3 |
| TSCA | Yes |
| HazardClass | 8 |
| PackingGroup | II |
| HS Code | 28331900 |
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Product Usage
Sodium Chlorite (for ClO₂), as a strong oxidizing agent and a key raw material for the preparation of chlorine dioxide (ClO₂), is widely used in the field of water treatment for the disinfection and sterilization of drinking water, industrial circulating water, and wastewater.
It effectively eliminates bacteria, viruses, and other microorganisms present in water, while also helping to remove odor and color, and reduce the presence of harmful residues, thereby improving overall water quality.
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