Structure
Identifiers
CAS:
100-03-8IUPAC name: 4-chlorobenzenesulfinic acid
Formula:
C6H5ClO2SMW: 176.62 g/mol
Structural identifiers
SMILES: C1=CC(=CC=C1S(=O)O)Cl
InChIKey: AOQYAMDZQAEDLO-UHFFFAOYSA-N
InChI: InChI=1S/C6H5ClO2S/c7-5-1-3-6(4-2-5)10(8)9/h1-4H,(H,8,9)
Specifications
Commercial
Inventory: to order
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Computed descriptors aggregated from PubChem for CAS 100-03-8.
| XLogP | 1.8 |
|---|---|
| Complexity | 132 |
| Exact mass | 175.9698783 g/mol |
| Formal charge | 0 |
| Heavy atom count | 10 |
| Monoisotopic mass | 175.9698783 g/mol |
| H-bond donor count | 1 |
| Rotatable bond count | 1 |
| H-bond acceptor count | 3 |
| Topological polar surface area (TPSA) | 56.5 Ų |
China regulatory compliance
Not listed in hazardous / restricted catalogues
Sourcing & suppliers — 4-chlorobenzenesulfinic acid
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Who supplies 4-chlorobenzenesulfinic acid in China?
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Which suppliers provide a COA or analysis report for 4-chlorobenzenesulfinic acid?
A batch-specific Certificate of Analysis ships with every 4-chlorobenzenesulfinic acid (CAS 100-03-8) order. Request the latest COA through ChemExact — every quote includes a COA and batch traceability.
Frequently asked questions
Curated by ChemExact's editorial team and reviewed by chemistry and API procurement specialists. Each factual claim is traceable to the cross-source citation graph at the bottom of the page.
What is 4-chlorobenzenesulfinic acid (CAS 100-03-8)?
4-chlorobenzenesulfinic acid is a chemical compound with molecular formula C6H5ClO2S and molecular weight ≈ 176.62 g/mol. Its CAS Registry Number is 100-03-8.
What chemical does CAS 100-03-8 refer to?
CAS Registry Number 100-03-8 refers to 4-chlorobenzenesulfinic acid, molecular formula C6H5ClO2S, molecular weight ≈ 176.62 g/mol. The CAS number is verifiable on PubChem, CAS Common Chemistry and ECHA. To source 4-chlorobenzenesulfinic acid, submit an RFQ on this page to be matched with ChemExact's verified supplier network, with batch COAs.
What is the molecular formula and weight of 4-chlorobenzenesulfinic acid (CAS 100-03-8)?
The molecular formula of 4-chlorobenzenesulfinic acid is C6H5ClO2S, and the molecular weight is 176.62 g/mol. This data has been cross-verified against PubChem, ChEMBL and CAS Common Chemistry.
What are the SMILES and InChIKey of 4-chlorobenzenesulfinic acid?
The canonical SMILES of 4-chlorobenzenesulfinic acid is `C1=CC(=CC=C1S(=O)O)Cl`, and the InChIKey is `AOQYAMDZQAEDLO-UHFFFAOYSA-N`. These international identifiers are reusable in PubChem, ChemDraw, RDKit and most cheminformatics toolchains.
What are the common synonyms of 4-chlorobenzenesulfinic acid?
Common synonyms of 4-chlorobenzenesulfinic acid include: 4-Chlorobenzenesulfinic acid, 100-03-8, Benzenesulfinic acid, 4-chloro-, p-Chlorobenzenesulphinic acid, p-Chlorobenzenesulfinic acid, Benzenesulfinic acid, p-chloro-, EINECS 202-812-2, RK78NW65EY — 20 synonyms in total. The full list (sourced from PubChem) is available in the page header under "Show synonyms".
What is the current price of 4-chlorobenzenesulfinic acid (CAS 100-03-8)?
ChemExact does not publish public price lists for 4-chlorobenzenesulfinic acid. No verified supplier has linked this SKU yet — submit an RFQ below and our BD team will return 3+ comparative quotes within 48–72 hours, each with batch traceability and a COA. For background market context only (non-binding), industry bulletins such as ICIS or national commodity indices may be consulted independently.
How has 4-chlorobenzenesulfinic acid price trended recently?
4-chlorobenzenesulfinic acid pricing follows upstream feedstocks, export demand, and plant turnaround cycles. ChemExact does not quote spot indices on this page. For a procurement decision, submit an RFQ — suppliers respond with current lot pricing and lead time. Independent market bulletins (ICIS, national commodity indices) may be used only as non-binding background reference.
Who are the major manufacturers of 4-chlorobenzenesulfinic acid in China?
China-based manufacturers of 4-chlorobenzenesulfinic acid (CAS 100-03-8) are matched on demand by the ChemExact business team. Submit an RFQ or contact bd@chemexact.com — a BD advisor will shortlist candidates from regulated directories (e.g. China MEM hazardous-chemicals registration at https://whpdj.mem.gov.cn/) with full provenance on each dossier. Supplier discovery is handled through ChemExact's verified network, not third-party marketplaces.
Which suppliers in East / North / South China stock 4-chlorobenzenesulfinic acid?
Regional supply of 4-chlorobenzenesulfinic acid (CAS 100-03-8) is matched on demand through ChemExact's own verified network. Submit an RFQ stating your target region (East / North / South China), or reach the ChemExact business team at bd@chemexact.com — a BD advisor will match verified producers from regulated enterprise registries and return comparable quotes with COAs. When ChemExact's geo-browse directory is enabled, city-level supplier pages list credentials and last review dates.
Who are the largest global producers of 4-chlorobenzenesulfinic acid?
International supply of 4-chlorobenzenesulfinic acid (CAS 100-03-8) is arranged by the ChemExact business team based on export credentials. Submit an RFQ or contact bd@chemexact.com — a BD advisor will match qualified exporters and return batch COAs, trade terms, and Incoterms. For regulatory due diligence, consult ECHA REACH (CAS 100-03-8), US EPA CompTox, or Japan NITE — these are compliance references, not procurement marketplaces.
What grades of 4-chlorobenzenesulfinic acid are commercially available?
4-chlorobenzenesulfinic acid is typically supplied in the following grades: Industrial / Technical (≥ 99%, bulk feedstock), Reagent (AR/CP/GR, ≥ 99.5%, lab analytics), HPLC / GC (≥ 99.9%, chromatography & spectroscopy). Grade-specific specs are confirmed via the supplier's SDS and CoA. ChemExact lets verified suppliers attach hash-validated CoA/SDS files on their brand product pages.
Where can I download the SDS / MSDS for 4-chlorobenzenesulfinic acid (CAS 100-03-8)?
Authoritative SDS sources: ① PubChem 'Safety and Hazards' section — https://pubchem.ncbi.nlm.nih.gov/compound/66847; ② US NIH Hazardous Substances Data Bank (HSDB); ③ ECHA REACH dossier; ④ Supplier-attached SDS on verified ChemExact brand pages. ChemExact does not host SDS files directly (to avoid version drift); all SDS links route to source.
Related research papers
Open-access publications referencing 4-chlorobenzenesulfinic acid (CAS 100-03-8), sourced from OpenAlex.
Visible-Light Induced Sulfonylation of Nitroolefins for the Synthesis of Vinyl Sulfones under Photocatalyst Free Conditions
Efficient Factors on the Reaction Rate and Site-Selectivity in Sulfonylation of Catechol and Hydroquinone Derivatives: Experimental and Theoretical Studies
New methods in the synthesis of multisubstituted hydrazines
Crystal Growth Regulation and Iodine Management for High Performance Inverted Inorganic Perovskite Solar Cells
Synthetic Routes and Bioactivity Profiles of the Phenothiazine Privileged Scaffold
Syntheses of Arylsulfone-thiazole Derivatives. V
Authoritative external references
Every chemistry property, compliance flag and literature claim on this page is traceable to the authoritative external sources below. Click any link to verify on the publishing institution's original page.
- ChEMBL · CHEMBL1615455 ↗ — EMBL-EBI · ChEMBL
- NIST WebBook · Registry Number Not Found ↗ — NIST · Standard Reference Data Program
- OpenAlex papers ↗ — OurResearch · OpenAlex
- PubChem Classification · CID 66847 ↗ — National Library of Medicine · PubChem
- China compliance (IECSC) ↗ — MEE · China IECSC
- PubChem PUG-View · CID 66847 ↗ — National Library of Medicine · PubChem
- PubChem · CID 66847 ↗ — National Library of Medicine · PubChem
Content & data statement.
Commercial information on this page (CAS, HS, EC, purity grade, indicative price band, lead time, inventory status,
REACH and FDA flags) is captured from supplier-controlled documents by the ChemExact editorial desk and reviewed
on a recurring cycle. Chemistry data — structures, synonyms, physico-chemical properties, hazard classifications and
the cited literature — is reconciled against internationally recognised authorities (including but not limited to
PubChem, CAS Common Chemistry, ECHA, China MEM, ChEMBL and OpenAlex) and cross-checked by our editors.
Disclaimer: This page is intended as a procurement-side technical reference and does not constitute legal, regulatory, or medical advice. Lot-level conformity is determined by the supplier-signed CoA and SDS. Transport, storage and handling must follow the applicable jurisdictional regulations and product SDS. If you spot a discrepancy with an authoritative source, please contact our editorial team — we review correction requests within five business days.
Disclaimer: This page is intended as a procurement-side technical reference and does not constitute legal, regulatory, or medical advice. Lot-level conformity is determined by the supplier-signed CoA and SDS. Transport, storage and handling must follow the applicable jurisdictional regulations and product SDS. If you spot a discrepancy with an authoritative source, please contact our editorial team — we review correction requests within five business days.
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