5-Sulfosalicylic acid dihydrate - ACS, ≥99% , CAS No.5965-83-3

CAS: 5965-83-3 Cat. No.: S112090 Molecular Weight: 254.21 Beilstein Registry Number: 650741 EC Number: 641-618-6 PubChem CID: 2723734
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GRADE & PURITY ACS ? ACS grade — meets American Chemical Society specifications, the analytical benchmark in the US. Use for analytical and QC work needing ACS-defined purity. ≥99%
Synonyms
SULFOSALICYLIC ACID DIHYDRATE [MI] | Salicylic acid, 5-sulfo-, dihydrate | 2-Hydroxy-5-sulfobenzoic-acid | Salicylic acid, 5-sulfo-, dihydrate; 5-Sulfosalicylic acid dihydrate | 5-Sulfosalicylic acid dihydrate, ReagentPlus(R), >=99% | FT-0620778 | SALICYL
Storage
Desiccated,Room temperature
Shipped In
Normal
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Size
Status
Price
Qty
100g
S112090-100g
2
$25.90
500g
S112090-500g
3
$59.90
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Why this grade

ACS, ≥99% ACS for sensitive chromatographic and analytical workflows requiring minimal baseline interference.

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Storage & shipping

Desiccated,Room temperature Ships Normal Check lot-specific COA for exact specifications.

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Quality documents

SDS, COA, datasheet, and spec sheet available for download. Lot-specific COA accessible via lot number lookup.

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Literature proof

Cited in 26 peer-reviewed publications across chromatography, organic synthesis, and cross-coupling reactions.

Specifications

Synonyms
SULFOSALICYLIC ACID DIHYDRATE [MI] | Salicylic acid, 5-sulfo-, dihydrate | 2-Hydroxy-5-sulfobenzoic-acid | Salicylic acid, 5-sulfo-, dihydrate; 5-Sulfosalicylic acid dihydrate | 5-Sulfosalicylic acid dihydrate, ReagentPlus(R), >=99% | FT-0620778 | SALICYL
Specifications & Purity
ACS, ≥99%
Storage
Desiccated, Room temperature
Shipped In
Normal
Grade
ACS
Purity
≥99%
Names and Identifiers
Pubchem Sid504760803
Pubchem Sid Urlhttps://pubchem.ncbi.nlm.nih.gov/substance/504760803
Canonical SmilesC1=CC(=C(C=C1S(=O)(=O)O)C(=O)O)O.O.O
IUPAC Name2-hydroxy-5-sulfobenzoic acid;dihydrate
InChIKeyBHDKTFQBRFWJKR-UHFFFAOYSA-N
INCHI1S/C7H6O6S.2H2O/c8-6-2-1-4(14(11,12)13)3-5(6)7(9)10;;/h1-3,8H,(H,9,10)(H,11,12,13);2*1H2
Isomeric SMILES C1=CC(=C(C=C1S(=O)(=O)O)C(=O)O)O.O.O
WGK Germany 3
Alternate CAS 97-05-2
PubChem CID 2723734
Molecular Weight 254.21
Beilstein 650741

Documentation

📋 Safety Data Sheet (SDS)

Comprehensive hazard, handling, storage, and regulatory compliance document.

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✅ Certificate of Analysis (COA)

Lot-specific quality data. Enter your lot number to retrieve the exact COA.

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📊 Datasheet

Quick-reference summary of product specifications and applications.

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🔬 Specification Sheet

Full quality attributes and acceptance criteria for this grade.

View spec sheet →

Advanced Data

Taxonomic Classification

Taxonomy Tree

KingdomOrganic compounds
SuperclassBenzenoids
ClassBenzene and substituted derivatives
SubclassBenzenesulfonic acids and derivatives
Intermediate Tree Nodes Sulfobenzoic acids
Direct Parent3-sulfobenzoic acids
Alternative Parents Sulfosalicylic acids and derivatives  Salicylic acids  Benzoic acids  Benzenesulfonyl compounds  1-sulfo,2-unsubstituted aromatic compounds  Benzoyl derivatives  1-hydroxy-2-unsubstituted benzenoids  Vinylogous acids  Sulfonyls  Organosulfonic acids  Monocarboxylic acids and derivatives  Carboxylic acids  Organooxygen compounds  Organic oxides  Hydrocarbon derivatives  
Molecular FrameworkAromatic homomonocyclic compounds
Substituents 3-sulfobenzoic acid - Sulfosalicylic acid or derivatives - Hydroxybenzoic acid - Salicylic acid or derivatives - Salicylic acid - Benzenesulfonyl group - 1-sulfo,2-unsubstituted aromatic compound - Benzoic acid or derivatives - Benzoic acid - Arylsulfonic acid or derivatives - Benzoyl - 1-hydroxy-2-unsubstituted benzenoid - Phenol - Vinylogous acid - Sulfonyl - Organosulfonic acid - Organosulfonic acid or derivatives - Organic sulfonic acid or derivatives - Carboxylic acid - Carboxylic acid derivative - Monocarboxylic acid or derivatives - Organic oxygen compound - Hydrocarbon derivative - Organooxygen compound - Organosulfur compound - Organic oxide - Aromatic homomonocyclic compound
DescriptionThis compound belongs to the class of organic compounds known as 3-sulfobenzoic acids. These are sulfobenzoic acid carrying the sulfonyl group at the 3-position of the benzene group.
External Descriptors Not available
3D Structure
Interactive Chemical Structure Model





Certificates(CoA,COO,BSE/TSE and Analysis Chart)
C of A & Other Certificates(BSE/TSE, COO):
Analytical Chart:

Find and download the COA for your product by matching the lot number on the packaging.

14 results found

Lot NumberCertificate TypeDateItem
G2228104Certificate of AnalysisMay 19, 2026 S112090
D2630449Certificate of AnalysisMay 11, 2026 S112090
L2503474Certificate of AnalysisDec 05, 2025 S112090
L2503475Certificate of AnalysisDec 05, 2025 S112090
J2513643Certificate of AnalysisOct 16, 2025 S112090
J2513672Certificate of AnalysisOct 16, 2025 S112090
G2530015Certificate of AnalysisAug 01, 2025 S112090
E2117275Certificate of AnalysisMar 04, 2025 S112090
E2427275Certificate of AnalysisMay 30, 2024 S112090
A2305613Certificate of AnalysisJan 12, 2023 S112090
E2413064Certificate of AnalysisJan 12, 2023 S112090
G2228108Certificate of AnalysisAug 15, 2022 S112090
E2218232Certificate of AnalysisMay 24, 2022 S112090
E2218238Certificate of AnalysisMay 24, 2022 S112090

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Chemical and Physical Properties
SensitivityLight Sensitive
Melt Point(°C)106 - 110 °C
Molecular Weight254.220 g/mol
XLogP3
Hydrogen Bond Donor Count5
Hydrogen Bond Acceptor Count8
Rotatable Bond Count2
Exact Mass254.01 Da
Monoisotopic Mass254.01 Da
Topological Polar Surface Area122.000 Ų
Heavy Atom Count16
Formal Charge0
Complexity316.000
Isotope Atom Count0
Defined Atom Stereocenter Count0
Undefined Atom Stereocenter Count0
Defined Bond Stereocenter Count0
Undefined Bond Stereocenter Count0
The total count of all stereochemical bonds0
Covalently-Bonded Unit Count3
Citations of This Product
References
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12. Sijia Yang, Xiao Song, Ran Wei, Chuanjiang Zhou, Zhaoqiang Wu, Hong Chen.  (2025)  A Transparent, Abrasion-Resistant Anti-Fog Coating on Glass Substrates.  JOURNAL OF APPLIED POLYMER SCIENCE,      [PMID:] [10.1002/app.56818]
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