{"id":48495,"date":"2024-05-09T16:54:14","date_gmt":"2024-05-09T08:54:14","guid":{"rendered":"http:\/\/www.newtopchem.com\/archives\/48495"},"modified":"2024-05-09T16:54:14","modified_gmt":"2024-05-09T08:54:14","slug":"1-naphthylamine-8-sulfonic-acid","status":"publish","type":"post","link":"http:\/\/www.newtopchem.com\/archives\/48495","title":{"rendered":"1-Naphthylamine-8-sulfonic acid","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p><img decoding=\"async\" loading=\"lazy\" class=\"alignnone size-full wp-image-48494\" src=\"http:\/\/www.newtopchem.com\/wp-content\/uploads\/2024\/05\/2e27fc36fe77417cb30d0f24f695fa40.gif\" width=\"283\" height=\"227\" alt=\"1-Naphthylamine-8-sulfonic acid structural formula\" \/><\/p>\n<p>Structural formula<\/p>\n<table class=\"summary-table table table-striped table-bordered\">\n<col width=\"90\" \/>\n<tbody>\n<tr>\n<th scope=\"row\">Business number<\/th>\n<td>01T4<\/td>\n<\/tr>\n<tr>\n<th scope=\"row\">Molecular formula<\/th>\n<td>C10H9NO3S<\/td>\n<\/tr>\n<tr>\n<th scope=\"row\">Molecular weight<\/th>\n<td>223.25<\/td>\n<\/tr>\n<tr>\n<th scope=\"row\">label<\/th>\n<td>\n<p>                         Peripheral acid,<\/p>\n<p>                         1,8-Clif acid,<\/p>\n<p>                         8-amino-1-naphthalenesulfonic acid,<\/p>\n<p>                         forced acid,<\/p>\n<p>                         1,8-Klev acid,<\/p>\n<p>                         1-Naphthylamine-8-sulfonic acid,<\/p>\n<p>                         8-Naphthylamine-1-sulfonic acid,<\/p>\n<p>                         1,8-naphthylamine sulfonic acid,<\/p>\n<p>                         8-aminonaphthalene-1-sulfonic acid,<\/p>\n<p>                         Peri acid,<\/p>\n<p>                         8-Amino-1-naphthalenesulfonic acid,<\/p>\n<p>                         8-Aminonaphthalene-1-sulphonic acid<\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<ul class=\"nav nav-tabs\">\n<li class=\"active\"><a href=\"#bh\">Numbering system<\/a><\/li>\n<li><a href=\"#wx\">Physical property data<\/a><\/li>\n<li><a href=\"#dl\">Toxicological data<\/a><\/li>\n<li><a href=\"#st\">Ecological data<\/a><\/li>\n<li><a href=\"#fz\">Molecular structure data<\/a><\/li>\n<li><a href=\"#js\">Computing chemical data<\/a><\/li>\n<li class=\"dropdown pull-right\">\n                     <a href=\"\" class=\"dropdown-toggle\">More <span class=\"caret\"><\/span><\/a><\/p>\n<ul class=\"dropdown-menu\" role=\"menu\">\n<li><a href=\"#xz\">Properties and Stability<\/a><\/li>\n<li><a href=\"#zc\">Storage method<\/a><\/li>\n<li><a href=\"#hc\">Synthesis method<\/a><\/li>\n<li><a href=\"#yt\">Purpose<\/a><\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h2 id=\"bh\">Numbering system<\/h2>\n<p><b>CAS number:<\/b>82-75-7<\/p>\n<p><b>MDL number:<\/b>MFCD00035730<\/p>\n<p><b>EINECS number:<\/b>201-437-1<\/p>\n<p><b>RTECS number:<\/b>None<\/p>\n<p><b>BRN number:<\/b>983230<\/p>\n<p><b>PubChem ID:<\/b>None<\/p>\n<h2 id=\"wx\">Physical property data<\/h2>\n<p><p>1. Character: white needle-like crystal<\/p>\n<p>2. Density (g\/mL, 25\/4\u2103): 1.72<\/p>\n<p>3. Relative vapor density (g\/mL,  Air=1): Uncertain<\/p>\n<p>4. Melting point (\u00baC): &gt;350<\/p>\n<p>5. Boiling point (\u00baC, normal pressure): Uncertain<\/p>\n<p>6  . Boiling point (\u00baC, 5.2kPa): Uncertain<\/p>\n<p>7. Refractive index: Uncertain<\/p>\n<p>8. Flash point (\u00baC): Uncertain<\/p>\n<p>9  . Specific rotation (\u00ba): Uncertain<\/p>\n<p>10. Autoignition point or ignition temperature (\u00baC): Uncertain<\/p>\n<p>11. Vapor pressure (kPa, 25\u00baC): Uncertain  <\/p>\n<p>12. Saturated vapor pressure (kPa, 60\u00baC): Uncertain<\/p>\n<p>13. Heat of combustion (KJ\/mol): Uncertain<\/p>\n<p>14. Critical temperature  (\u00baC): Uncertain<\/p>\n<p>15. Critical pressure (KPa): Uncertain<\/p>\n<p>16. Log value of oil-water (octanol\/water) partition coefficient: Uncertain<\/p>\n<p>17. Explosion upper limit (%, V\/V): Uncertain<\/p>\n<p>18. Explosion lower limit (%, V\/V): Uncertain<\/p>\n<p>19. Solubility  : Soluble in glacial acetic acid, slightly soluble in hot water, very slightly soluble in cold water.  <\/p>\n<\/p>\n<h2 id=\"dl\">Toxicological data<\/h2>\n<p>\n     None yet\n     <\/p>\n<h2 id=\"st\">Ecological data<\/h2>\n<p>\n     None yet\n     <\/p>\n<h2 id=\"fz\">Molecular structure data<\/h2>\n<p>\n     1. Molar refractive index: 58.27<\/p>\n<p>2. Molar volume (cm<sup>3<\/sup>\/mol): 148.6<\/p>\n<p>3. Isotonic specific volume (90.2K): 433.1<\/p>\n<p>4. Surface tension (dyne\/cm): 72.1<\/p>\n<p>5. Polarizability (10<sup>-24<\/sup>cm<sup>3<\/sup>): 23.10<\/p>\n<\/p>\n<h2 id=\"js\">Compute chemical data<\/h2>\n<p><p>1. Reference value for hydrophobic parameter calculation (XlogP): 1.2<\/p>\n<p>2. Number of hydrogen bond donors: 2<\/p>\n<p>3. Number of hydrogen bond acceptors: 4<\/p>\n<p>4. Number of rotatable chemical bonds: 1<\/p>\n<p>5. Topological molecular polar surface area (TPSA): 80.4<\/p>\n<p>6. Number of heavy atoms: 15<\/p>\n<p>7. Surface charge: 0<\/p>\n<p>8. Complexity: 322<\/p>\n<p>9. Number of isotope atoms: 0<\/p>\n<p>10. Determine the number of atomic stereocenters  : 0<\/p>\n<p>11. Uncertain number of atomic stereocenters: 0<\/p>\n<p>12. Determined number of chemical bond stereocenters: 0<\/p>\n<p>13. Uncertain chemical bond formation  Number of structural centers: 0<\/p>\n<p>14, Number of covalent bond units: 1<\/p>\n<\/p>\n<h2 id=\"xz\">Properties and stability<\/h2>\n<p><p>Contains one molecule of crystal water, which is lost when heated to 130\u00b0C.  <\/p>\n<p>Poisonous.  Can cause poisoning if swallowed or absorbed through skin.  Protective measures should be taken during the production process, good ventilation should be maintained at the production site, and operators should wear protective equipment.  <\/p>\n<\/p>\n<h2 id=\"zc\">Storage method<\/h2>\n<p><p>Should be sealed, dry and protected from light.  <\/p>\n<p>Packaged in 50kg plywood barrels or wood fiber round barrels lined with PVC bags.  The mouth of the bag should be tied tightly and the lid of the bucket must be tightly sealed.  <\/p>\n<\/p>\n<h2 id=\"hc\">Synthesis method<\/h2>\n<p><p>The naphthalene method is mainly used.  It is obtained by using naphthalene as raw material, low-temperature sulfonation with sulfuric acid, nitration with nitric acid, neutralization with magnesium carbonate, reduction of iron powder, and then acid precipitation and filtration.  During the production of Klev&#8217;s acid, a mixed magnesium salt of aminonaphthalene sulfonate is obtained, which also contains magnesium salt of 1,8-aminonaphthalene sulfonate.  These three isomer magnesium salts have different solubilities at different temperatures. During operation, the mixed solution (reducing solution) is first concentrated to a certain concentration, cooled to 30-32\u00b0C, and 1,6-aminonaphthalene sulfonic acid is precipitated first.  Magnesium salt (after filtration, acid precipitation yields 1,6-Klef acid); the filtrate is partially acidified by adding sulfuric acid, stirred at 40-45\u00b0C for 12 hours, and 1-naphthylamine-8-sulfonic acid is obtained by filtration.  The filtrate is further subjected to acid precipitation to obtain 1,7-Klev acid.  <\/p>\n<\/p>\n<h2 id=\"yt\">Purpose<\/h2>\n<p><p>Dye chemistry, synthesis of azo dyes.  Organic Synthesis.  Used to manufacture a series of aniline dyes and intermediates, such as phenyl peric acid, tolyl peric acid, amino C acid, Chicago acid, navy gray and sulfide dark green 3GW, etc.  <\/p>\n<\/p>\n<p>     extended-reading:<a href=\"https:\/\/www.cyclohexylamine.net\/delayed-equilibrium-catalyst-dabco-catalyst\/\">https:\/\/www.cyclohexylamine.net\/delayed-equilibrium-catalyst-dabco-catalyst\/<\/a><\/br>extended-reading:<a href=\"https:\/\/www.bdmaee.net\/wp-content\/uploads\/2023\/02\/1-2-1.jpg\">https:\/\/www.bdmaee.net\/wp-content\/uploads\/2023\/02\/1-2-1.jpg<\/a><\/br>extended-reading:<a href=\"https:\/\/www.bdmaee.net\/dabco-dc1-delayed-catalyst-dabco-dc1-delayed-strong-gel-catalyst-dabco-dc1\/\">https:\/\/www.bdmaee.net\/dabco-dc1-delayed-catalyst-dabco-dc1-delayed-strong-gel-catalyst-dabco-dc1\/<\/a><\/br>extended-reading:<a href=\"https:\/\/www.newtopchem.com\/archives\/45120\">https:\/\/www.newtopchem.com\/archives\/45120<\/a><\/br>extended-reading:<a href=\"https:\/\/www.bdmaee.net\/nn-dimethyl-ethanolamine-3\/\">https:\/\/www.bdmaee.net\/nn-dimethyl-ethanolamine-3\/<\/a><\/br>extended-reading:<a href=\"https:\/\/www.bdmaee.net\/wp-content\/uploads\/2022\/08\/115-11.jpg\">https:\/\/www.bdmaee.net\/wp-content\/uploads\/2022\/08\/115-11.jpg<\/a><\/br>extended-reading:<a href=\"https:\/\/www.newtopchem.com\/archives\/44203\">https:\/\/www.newtopchem.com\/archives\/44203<\/a><\/br>extended-reading:<a href=\"https:\/\/www.cyclohexylamine.net\/catalyst-2033-tertiary-polyurethane-catalyst\/\">https:\/\/www.cyclohexylamine.net\/catalyst-2033-tertiary-polyurethane-catalyst\/<\/a><\/br>extended-reading:<a href=\"https:\/\/www.bdmaee.net\/wp-content\/uploads\/2022\/08\/134-1.jpg\">https:\/\/www.bdmaee.net\/wp-content\/uploads\/2022\/08\/134-1.jpg<\/a><\/br>extended-reading:<a href=\"https:\/\/www.bdmaee.net\/jeffcat-zr-50-catalyst-cas67151-63-7-huntsman\/\">https:\/\/www.bdmaee.net\/jeffcat-zr-50-catalyst-cas67151-63-7-huntsman\/<\/a><\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>Structural formula Business number 01T4 Molecular formu&#8230;<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":48494,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":[],"categories":[6],"tags":[15212],"gt_translate_keys":[{"key":"link","format":"url"}],"_links":{"self":[{"href":"http:\/\/www.newtopchem.com\/wp-json\/wp\/v2\/posts\/48495"}],"collection":[{"href":"http:\/\/www.newtopchem.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.newtopchem.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.newtopchem.com\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/www.newtopchem.com\/wp-json\/wp\/v2\/comments?post=48495"}],"version-history":[{"count":0,"href":"http:\/\/www.newtopchem.com\/wp-json\/wp\/v2\/posts\/48495\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"http:\/\/www.newtopchem.com\/wp-json\/wp\/v2\/media\/48494"}],"wp:attachment":[{"href":"http:\/\/www.newtopchem.com\/wp-json\/wp\/v2\/media?parent=48495"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.newtopchem.com\/wp-json\/wp\/v2\/categories?post=48495"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.newtopchem.com\/wp-json\/wp\/v2\/tags?post=48495"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}