5-aminonaphthalene-1-sulfonic acid
1-Aminonaphtalene-5-sulfonic acid
CAS: 84-89-9
Molecular Formula: C10H9NO3S
5-aminonaphthalene-1-sulfonic acid - Names and Identifiers
| Name | 1-Aminonaphtalene-5-sulfonic acid |
| Synonyms | Laurens Acid Laurents acid 5-aminonaphthalene-1-sulfonate 1-naphthylamine-5-sulfonic acid 1-Naphthylamine-5-sulphonic acid 5-amino-1-naphthalenesulfonicaci 1-Aminonaphtalene-5-sulfonic acid 5-Amino-1-naphthalenesulfonic acid 1-Amino-5-naphthalenesulfonic acid 5-aminonaphthalene-1-sulfonic acid 5-Aminonaphthalene-1-sulphonic acid 5-Amino-1-naphthylamine-5-sulfonic acid Laurent's Acid1-Naphthylamine-5-sulfonic Acid 1-NAPHTHYLAMINE-5-SULFONICACID(LAURENT''SACID) Laurents acid~1-Naphthylamine-5-sulphonic acid |
| CAS | 84-89-9 |
| EINECS | 201-571-0 |
| InChI | InChI=1/C10H9NO3S/c11-9-5-1-4-8-7(9)3-2-6-10(8)15(12,13)14/h1-6H,11H2,(H,12,13,14)/p-1 |
5-aminonaphthalene-1-sulfonic acid - Physico-chemical Properties
| Molecular Formula | C10H9NO3S |
| Molar Mass | 223.25 |
| Density | 1.3588 (rough estimate) |
| Melting Point | >300°C |
| Boling Point | 220°C (rough estimate) |
| Water Solubility | Soluble in hot water. |
| Appearance | powder to crystal |
| Color | Purple to Dark purple to Dark red |
| Merck | 14,6404 |
| BRN | 2214149 |
| pKa | pK1: 3.69 (25°C) |
| Storage Condition | Room Temprature |
| Refractive Index | 1.6500 (estimate) |
| MDL | MFCD00014315 |
| Physical and Chemical Properties | characteristics of industrial products are generally paste-like, pure white or light pink red needle-like crystals, dilute aqueous solution with green fluorescence. soluble in 950 parts of cold water, more soluble in hot water |
| Use | For the preparation of acid dyes and reactive dyes, is also the preparation of 1-naphthol -5-sulfonic acid intermediates |
5-aminonaphthalene-1-sulfonic acid - Risk and Safety
| Hazard Symbols | C - Corrosive |
| Risk Codes | R20/21/22 - Harmful by inhalation, in contact with skin and if swallowed. R34 - Causes burns |
| Safety Description | S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S36/37/39 - Wear suitable protective clothing, gloves and eye/face protection. S45 - In case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.) |
| UN IDs | UN 2585 8/PG 3 |
| WGK Germany | 3 |
| RTECS | QK1270500 |
| TSCA | Yes |
| Hazard Class | 8 |
| Packing Group | III |
5-aminonaphthalene-1-sulfonic acid - Upstream Downstream Industry
| Raw Materials | Sulfuric acid Naphthalene Nitric acid |
5-aminonaphthalene-1-sulfonic acid - Introduction
Soluble in 950 parts of cold water, more soluble in hot water. After drying or heating to 110 ℃, it becomes anhydrous. The sodium salt of the product is easily soluble in water and ethanol, and the dilute aqueous solution is light green fluorescence.
Last Update：2022-10-16 17:29:18
5-aminonaphthalene-1-sulfonic acid - Reference Information
| EPA chemical substance information | information provided by: ofmpeb.epa.gov (external link) |
| Use | for the preparation of acid dyes and reactive dyes, it is also an intermediate for preparing 1-naphthol -5-sulfonic acid. This product is an intermediate for azo dyes and is also used in the manufacture of 1-naphthol sulfonic acid products. |
| production method | Naphthalene sulfonic acid is obtained by sulfonation of naphthalene at low temperature, and 5-nitro-1-naphthalene sulfonic acid is obtained by Nitration with nitric acid, then the magnesium salt of 1-Naphthylamine -8-sulfonic acid was separated by neutralization with magnesium carbonate, and then reduced by iron powder and acidified with sulfuric acid to obtain the pericolic acid. The filtrate obtained by neutralization and separation is reduced and acidified to obtain 1-Naphthylamine -5-sulfonic acid. |
| category | toxic substances |
| toxicity grade | low toxicity |
| Acute toxicity | oral-rat LD50: > 5000 mg/kg; Oral-mouse LD50: LD50: > 5000 mg/kg |
| flammability hazard characteristics | flammability; Toxic nitrogen oxide and sulfur oxide fumes from combustion |
| storage and transportation characteristics | warehouse ventilation and low temperature drying |
| extinguishing agent | dry powder, foam, sand, carbon dioxide, water mist |
Last Update：2024-04-09 20:52:54
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Raw Materials for 5-aminonaphthalene-1-sulfonic acid