7631-90-5
Product Name:
Sodium bisulfite
Formula:
HNaO3S
Synonyms:
Sodium bisulfite, Sodium bisulfite solution, Bisulfite;Sodium disulfite;Sodium hydrogen sulfite;Sodium hydrogensulfite;Sodium metabisulfite, Sodium pyrosulfite, Disulfite, Pyrosulfite
Inquiry
CHEMICAL AND PHYSICAL PROPERTIES
| Physical Description | Sodium bisulfite appears as white crystals or crystalline powder. Slight sulfurous odor. Specific gravity 1.48. Strong irritant to skin and tissue. |
|---|---|
| Color/Form | White crystal or crystalline powder |
| Odor | Slight sulfurous odor |
| Taste | Disagreeable taste |
| Boiling Point | Decomposes (NIOSH, 2023) |
| Melting Point | Decomposes (NIOSH, 2023) |
| Solubility | 29 % (NIOSH, 2023) |
| Density | 1.48 at 68 °F (USCG, 1999) - Denser than water; will sink |
| Vapor Pressure | Vapor pressure, kPa at 20 °C: 2.4 |
| Stability/Shelf Life | ON EXPOSURE TO AIR IT LOSES SOME SULFUR DIOXIDE & IS GRADUALLY OXIDIZED TO SULFATE. |
| Autoignition Temperature | Not flammable (USCG, 1999) |
| Decomposition | Emits toxic fumes of oxides of sulfur & sodium monoxide when heated to decomposition. |
| Viscosity | 3.64 mPa*s at 20 °C |
| pH | 2,5-5,5 (10 % aqueous solution) |
| Refractive Index | INDEX OF REFRACTION: 1.526 |
| Chemical Classes | Other Classes -> Sulfites |
SAFETY INFORMATION
| Signal word | Warning |
|---|---|
| Pictogram(s) |
 Exclamation Mark Irritant GHS07 |
| GHS Hazard Statements |
H302:Acute toxicity,oral |
| Precautionary Statement Codes |
P264:Wash hands thoroughly after handling. P264:Wash skin thouroughly after handling. P270:Do not eat, drink or smoke when using this product. P301+P312:IF SWALLOWED: call a POISON CENTER or doctor/physician IF you feel unwell. P501:Dispose of contents/container to..… |
COMPUTED DESCRIPTORS
| Molecular Weight | 104.06 g/mol |
|---|---|
| Hydrogen Bond Donor Count | 1 |
| Hydrogen Bond Acceptor Count | 4 |
| Rotatable Bond Count | 0 |
| Exact Mass | 103.95440935 g/mol |
| Monoisotopic Mass | 103.95440935 g/mol |
| Topological Polar Surface Area | 79.6 Ų |
| Heavy Atom Count | 5 |
| Formal Charge | 0 |
| Complexity | 33.9 |
| Isotope Atom Count | 0 |
| Defined Atom Stereocenter Count | 0 |
| Undefined Atom Stereocenter Count | 0 |
| Defined Bond Stereocenter Count | 0 |
| Undefined Bond Stereocenter Count | 0 |
| Covalently-Bonded Unit Count | 2 |
| Compound Is Canonicalized | Yes |
PRODUCT INTRODUCTION
description
Sodium bisulfite appears as white crystals or crystalline powder. Slight sulfurous odor. Specific gravity 1.48. Strong irritant to skin and tissue.