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CAS 81-04-9

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1,5-Naphthalenedisulfonic acid

Description:
1,5-Naphthalenedisulfonic acid, with the CAS number 81-04-9, is an organic compound characterized by the presence of two sulfonic acid groups (-SO3H) attached to a naphthalene ring at the 1 and 5 positions. This compound appears as a white to light yellow crystalline solid and is soluble in water, making it useful in various applications. It is primarily utilized as a dye intermediate and in the synthesis of other chemical compounds due to its ability to act as a sulfonating agent. The presence of sulfonic acid groups imparts strong acidic properties, allowing it to participate in various chemical reactions, including electrophilic substitution. Additionally, 1,5-naphthalenedisulfonic acid can exhibit properties such as high thermal stability and the ability to form salts with bases. Its derivatives are often employed in the production of azo dyes and as dispersants in various industrial processes. Safety precautions should be taken when handling this compound, as it may cause irritation to the skin and eyes.
Formula:C10H8O6S2
InChI:InChI=1S/C10H8O6S2/c11-17(12,13)9-5-1-3-7-8(9)4-2-6-10(7)18(14,15)16/h1-6H,(H,11,12,13)(H,14,15,16)
InChI key:InChIKey=XTEGVFVZDVNBPF-UHFFFAOYSA-N
SMILES:S(=O)(=O)(O)C=1C2=C(C(S(=O)(=O)O)=CC=C2)C=CC1
Synonyms:
  • 1,5-Naphthalenedisulfonic acid
  • Armstrong's acid
  • NSC 9588
  • Napadisylic acid
  • Naphthalene-1,5-Disulfonic Acid
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