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7631-90-5

7631-90-5 structural image
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
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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.

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