Lot numbers can be found on the outside label of a product:
6-Aminonaphthalene-1,3-disulfonic acid
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CAS No. 118-33-2
- Cat. No. CS-0367308
- Purity≥95%
- MDL No.MFCD00021513
*For research and further manufacturing use only, not for direct human use.
Structure of 118-33-2
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General Information
- CAS No. 118-33-2
- Cat. No. CS-0367308
- Purity ≥95%
- MDL No. MFCD00021513
- Storage 4°C, protect from light
- Shipping Room temperature in continental US; may vary elsewhere.
- Molecular Formula C₁₀H₉NO₆S₂
- Molecular Weight 303.31
- Synonym(s) 6-aminonaphthalene-1,3-disulphonic acid
- SMILES C1=CC2=C(C=C(C=C2C=C1N)S(=O)(=O)O)S(=O)(=O)O
Description
6-Aminonaphthalene-1,3-disulfonic acid features a naphthalene core bearing two sulfonic acid groups and a primary amine at the 6-position, offering high water solubility and robust stability under standard conditions. The electron-rich aromatic system enables efficient coupling reactions, while the ortho-sulfonate arrangement enhances solvation and reactivity in aqueous media. This structure supports use in dye synthesis, polymer functionalization, and bioconjugation workflows requiring precise charge distribution and hydrophilic character.
Application
6-Aminonaphthalene-1,3-disulfonic acid serves as a versatile building block for sulfonated aromatic systems, enabling efficient access to dyes, ion-exchange resins, and functionalized heterocycles. Its ortho-disulfonic acid groups provide enhanced water solubility and stability, while the 6-amino functionality facilitates direct coupling reactions, including diazotization and electrophilic substitution. The compound exhibits excellent bench stability and simplifies purification in aqueous media, making it well-suited for scalable synthesis in industrial and process chemistry applications.
Synthesis
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Route1
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81-16-3 - ~0%
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In-stock
118-33-2
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86-65-7
References
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American Cyanamid Company Patent: US3979445 A1, 1976 ;
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Route2
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In-stock
81-05-0 - ~%
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In-stock
118-33-2
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117-62-4
References
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Chem. News J. Ind. Sci., , vol. 62, p. 163
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Route3
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91-59-8
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In-stock
118-33-2
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86-65-7
References
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Helvetica Chimica Acta, , vol. 6, p. 1147,1149 Grundlegende Operationen der Farbenchemie, 5. Aufl. <Wien 1943>, S. 197
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Safety Information
Download SDS|
GHS Pictogram :
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GHS No : GHS07
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Signal Word : Warning
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UN#: N/A
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Class : N/A
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Packing Group : N/A
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Hazard Statements : H302-H315-H319-H335
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Precautionary Statements : P261-P264-P270-P271-P280-P302+P352-P304+P340-P305+P351+P338-P330-P362+P364-P403+P233-P405-P501
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Quality Control
Computational Chemistry Data
- TPSA 134.76
- LogP 0.9154
- H_Acceptors 5
- H_Donors 3
- Rotatable_Bonds 2
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Key Words
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