1-Amino-8-naphtalenesulfonic acid
8-aminonaphthalene-1-sulphonic acid
CAS: 82-75-7
Molecular Formula: C10H9NO3S
1-Amino-8-naphtalenesulfonic acid - Names and Identifiers
1-Amino-8-naphtalenesulfonic acid - Physico-chemical Properties
| Molecular Formula | C10H9NO3S |
| Molar Mass | 223.25 |
| Density | 1.3588 (rough estimate) |
| Melting Point | >350°C |
| Boling Point | 220°C (rough estimate) |
| Water Solubility | 0.2g/L(21 ºC) |
| Appearance | White crystal |
| Color | Light yellow to Brown |
| Merck | 14,6405 |
| BRN | 983230 |
| pKa | pK1: 5.03 (25°C) |
| Storage Condition | Room Temprature |
| Sensitive | Sensitive to air |
| Refractive Index | 1.6500 (estimate) |
| MDL | MFCD00035730 |
| Physical and Chemical Properties | Character: White needle-like crystal. soluble in 4800 parts of cold water, 240 parts of hot water, soluble in glacial acetic acid. |
| Use | For the manufacture of VAT and reactive dyes, and for the synthesis of phenyl and tolyl periacids |
1-Amino-8-naphtalenesulfonic acid - Risk and Safety
| Hazard Symbols | C - Corrosive |
| Risk Codes | 34 - Causes burns |
| Safety Description | S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S27 - Take off immediately all contaminated clothing. S36 - Wear suitable protective clothing. S45 - In case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.) |
| UN IDs | UN 3261 |
| TSCA | Yes |
| HS Code | 29214500 |
1-Amino-8-naphtalenesulfonic acid - Upstream Downstream Industry
| Raw Materials | Sulfuric acid Naphthalene Iron Nitric acid Dolomite |
1-Amino-8-naphtalenesulfonic acid - Reference Information
| EPA chemical substance information | information provided by: ofmpeb.epa.gov (external link) |
| Use | for the manufacture of VAT and reactive dyes, and for the synthesis of phenyl and tolyl peri-acids used as dye intermediates for the manufacture of a series of aniline dyes and intermediates, such as phenyl peri-acids, tolyl peri-acids, amino C acids, chicago acid, Navy ash and sulfurized dark green 3GW, etc. |
| production method | in the process of producing kliev acid, a mixed magnesium salt of aminonaphthalene sulfonate is obtained, which also contains 1,8-amino Naphthalene sulfonic acid magnesium salt. The three isomers of magnesium salt have different solubility at different temperatures, operation, the first mixture (reducing liquid) concentration to a certain concentration, cooling to 30-32 ℃, first precipitation 1, 6-aminonaphthalenesulfonic acid magnesium salt (1, 6-clevulinic acid was obtained by acid analysis after filtration); The filtrate was partially acidified by adding sulfuric acid, and stirred at 40-45 ℃ for 12h, 1-Naphthylamine -8-sulfonic acid was obtained by filtration. The filtrate was further subjected to acid analysis to obtain 1, 7-clevulinic acid. Raw material consumption quota: refined naphthalene (99%)1206kg/t, nitric acid (98%)605kg/t, iron powder 1227kg/t, sulfuric acid (98%)3463kg/t, dolomite (including MgO 20%)27.86/t. |
Last Update：2024-04-09 19:05:15
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Raw Materials for 1-Amino-8-naphtalenesulfonic acid