Sulfurous Acid

CAS 7782-99-2  ·  H2O3S  ·  MW 82.08 g/mol

Full record: Sulfurous Acid — Safety Data Sheet →

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3D model Sulfurous Acid, CAS 7782-99-2, molecular formula H2O3S, molar mass 82.08 g/mol

Model views

  • Sulfurous Acid (CAS 7782-99-2) – ball-and-stick 3D model, MolGod Viewer
    ball-and-stick 3D model
  • Sulfurous Acid (CAS 7782-99-2) – skeletal 3D model, MolGod Viewer
    skeletal 3D model
  • space-filling 3D model – rotation animation
  • Sulfurous Acid (CAS 7782-99-2) – 2D structure, MolGod Viewer
    2D structure

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About Sulfurous Acid

Sulfurous Acid is a chemical compound registered under number CAS 7782-99-2, with the molecular formula H2O3S, and a molar mass of 82.08 g/mol.

The molecule contains 6 atoms connected by 5 chemical bonds. The full systematic IUPAC name of this compound is sulfurous acid. The interactive 3D model above lets you view the spatial arrangement of the atoms — you can rotate it with the mouse, zoom with the scroll wheel, and switch between skeletal / Ball & Stick / Space Fill visualization modes.

In terms of physicochemical properties, the partition coefficient logP = -0.5 (negative value, a hydrophilic compound), polar surface area PSA = 76.7 Ų, 2 donors and 4 hydrogen bond acceptors. These parameters are key when assessing bioavailability and interaction with biomolecules.

Chemical data for this compound comes from PubChem (NIH NLM NCBI), one of the world's largest chemical databases. All information is updated automatically and enriched with GHS hazard statement translations compliant with the CLP Regulation (EC 1272/2008). The interactive 3D model and the viewer images are protected by copyright (© MolGod.org) — terms of use: molgod.org/copyright/.

Physicochemical properties
Molecular formulaH2O3S
Molar mass82.08 g/mol
IUPACsulfurous acid
SMILESOS(=O)O
InChIKeyLSNNMFCWUKXFEE-UHFFFAOYSA-N
logP (XLogP3)-0.5
PSA76.7 Ų
HBD / HBA2 / 4
PubChem CIDCID 1100 ↗
GHS safety

Signal word: Danger

GHS05
GHS05
GHS07
GHS07

H314 — Causes severe skin burns and eye damage

H318 — Causes serious eye damage

H332 — Harmful if inhaled

Scientific literature

Related literature

2 articles · 0 open access · Sources: PubMed, OpenAlex, Semantic Scholar

Filters:Export:📄 BibTeX📑 RIS📋 EndNote🔧 CSL-JSON

📈 Publication timeline (number of articles: 2)

2004: number of articles 120042012: number of articles 12012

Bar height = number of articles in a given year. Hover over a bar to see details.

Data from PubMed (NIH NLM), OpenAlex (CC0), Semantic Scholar (AI2). AI Summary generated by Semantic Scholar TLDR. Articles marked with require paid access.

Synonyms
Sulfurous acid · 7782-99-2 · Sulphurous acid · Schweflige saure · H2SO3 · EINECS 231-973-1 · acide sulfureux · acido sulfuroso · schweflige Saeure · trioxosulfuric acid · dihydroxidooxidosulfur · UNII-J1P7893F4J · CHEBI:48854 · SULFUROUS ACID (H2SO3) · J1P7893F4J
Data sources
Related molecules
📜 License & provenanceMolGod_License_1
COMPUTED — PubChem3D · 3D conformer computed by PubChem using OMEGA; not an experimental structure.
Model
Sulfurous Acid · 7782-99-2
InChIKey
LSNNMFCWUKXFEE-UHFFFAOYSA-N
License
CC BY-SA 4.0 International
Attribution
MolGod Scientific — Sulfurous Acid (CAS 7782-99-2)
License & provenance record
Sulfurous Acid (CAS 7782-99-2) →
MolGod molecule record
Sulfurous Acid →
Source data
PubChem CID 1100 ↗
Model information
STL generated by MolGod · MolGod STL Exporter build 48804cd20b0d · generated 2026-10-14
SHA-256 (STL)
b612ee0f4650e7fbcb7f55da4c40651199d194ea754e556fb028160acb7bf278
MD5 (STL)
35ef0ef27ce7f6ab8d3d0b292b17d84f
MolGod Identification Number
MG_541-264-353-37
Transformation
MolGod Scientific ball-and-stick mesh
Changes
Converted into a triangulated molecular mesh; atomic coordinates and connectivity unchanged.
Wikimedia Commons
STL · PNG
Free printable molecule model
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This license applies to the MolGod-created STL mesh, not automatically to third-party source material.

This 3D model is also published on: Zenodo (DOI 10.5281/zenodo.23969938) · NIH 3D (3DPX-023840) · Wikimedia Commons
Included in datasets: Hugging Face · OSF project index
Source structure: PubChem (CID 1100)
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