92-41-1 Usage
Description
Naphthalene-2,7-disulfonic acid is a naphthalenesulfonic acid with sulfo groups attached to positions 2 and 7 of the naphthalene ring. It is a white, crystalline solid that is soluble in water and combustible.
Uses
Used in Chemical Synthesis:
Naphthalene-2,7-disulfonic acid is used as a chemical intermediate for the synthesis of various organic compounds and dyes. Its solubility in water and reactivity make it a useful building block in the production of complex molecules.
Used in Analytical Chemistry:
Naphthalene-2,7-disulfonic acid is used as a reference compound in analytical chemistry for the determination of various properties, such as solubility, polarity, and acidity. Its well-defined structure and properties allow for accurate measurements and comparisons.
Used in Environmental Applications:
Naphthalene-2,7-disulfonic acid can be used as a tracer compound in environmental studies to track the movement and behavior of pollutants in water systems. Its water solubility and distinctive chemical properties make it a suitable candidate for such applications.
Used in Pharmaceutical Industry:
Naphthalene-2,7-disulfonic acid is used as a starting material in the synthesis of pharmaceutical compounds, particularly those with potential therapeutic applications. Its chemical versatility allows for the development of new drugs with unique properties and mechanisms of action.
Used in Dye Manufacturing:
Naphthalene-2,7-disulfonic acid is used as a precursor in the production of dyes and pigments for various industries, such as textiles, plastics, and printing inks. Its ability to form colored compounds makes it a valuable component in the creation of vibrant and stable dyes.
Purification Methods
Crystallise the acid from conc HCl. The disulfonamide has m 273o (from EtOH). [Beilstein 11 II 119, 11 III 463.]
Check Digit Verification of cas no
The CAS Registry Mumber 92-41-1 includes 5 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 2 digits, 9 and 2 respectively; the second part has 2 digits, 4 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 92-41:
(4*9)+(3*2)+(2*4)+(1*1)=51
51 % 10 = 1
So 92-41-1 is a valid CAS Registry Number.
InChI:InChI=1/C10H8O6S2/c11-17(12,13)9-3-1-7-2-4-10(18(14,15)16)6-8(7)5-9/h1-6H,(H,11,12,13)(H,14,15,16)
92-41-1Relevant articles and documents
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Lynch,Scanlan
, (1927)
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Environmental-friendly H-acid synthesis method
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Paragraph 0036-0038, (2017/10/13)
The invention relates to a synthesis method and in particular relates to an environmental-friendly H-acid synthesis method which comprises the following steps: performing disulfonic treatment, performing bromination treatment, performing nitration treatment, and separating a middle body, namely 1-bromine-8-nitro-3,6-naphthalene disulfonic acid. The environmental-friendly H-acid synthesis method is capable of reducing environment pollution and preventing such potential safety hazard, and thus an operation environment is relatively safe and environmentally friendly.
Process for separation of naphthalenedisulfonic acids
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, (2008/06/13)
A process for separating 1,6-naphthalenedisulfonic acid, 2,6-naphthalenedisulfonic acid or 2,7-naphthalenedisulfonic acid selectively from reaction mixtures obtained by disulfonation of naphthalene under different reaction conditions is disclosed. For example, a particular disulfonation reaction of naphthalene is carried out which favors the formation of a particular isomer. This reaction mixture is diluted with water to adjust the sulfuric acid concentration to 35 to 90% by weight and the temperature is maintained at 0° to 80° C.; 1,6-naphthalene-disulfonic acid is selectively separated at high purity.
