118-33-2
6-aminonaphthalene-1,3-disulphonic acid
CAS: 118-33-2
Molecular Formula: C10H9NO6S2
118-33-2 - Names and Identifiers
| Name | 6-aminonaphthalene-1,3-disulphonic acid |
| Synonyms | amino-iacid kyselinaamino-i 2-naftylamin-5,7-disulfonansodny 6-amino-1,3-naphthalenedisulfonic 6-amino-3-naphthalenedisulfonicacid 2-Naphthylamine-5,7-disulfonicaacid 2-Naphthylamine-5,7-Disulfonic Acid 6-amino-naphthalene-3-disulfonicacid 6-aminonaphthalene-1,3-disulphonicacid 2-Aminonaphthalene-5,7-Disulfonic Acid 6-aminonaphthalene-1,3-disulphonic acid |
| CAS | 118-33-2 |
| EINECS | 204-246-1 |
| InChI | InChI=1/C10H9NO6S2/c11-7-1-2-9-6(3-7)4-8(18(12,13)14)5-10(9)19(15,16)17/h1-5H,11H2,(H,12,13,14)(H,15,16,17) |
118-33-2 - Physico-chemical Properties
| Molecular Formula | C10H9NO6S2 |
| Molar Mass | 303.31 |
| Density | 1.769±0.06 g/cm3(Predicted) |
| Boling Point | 568.34℃[at 101 325 Pa] |
| Water Solubility | 229g/L at 15℃ |
| Vapor Presure | 0Pa at 25℃ |
| pKa | -0.91±0.40(Predicted) |
| Storage Condition | Warehouse ventilation and low temperature drying |
| Refractive Index | 1.733 |
| Physical and Chemical Properties | White light long prismatic needle-like crystals, crystals precipitated from water containing 5 molecules of crystal water. The solubility in water at 20 °c was 23%. It is commonly used in the industry of its monosodium salt, single potassium salt, are soluble in water, salt solution has green fluorescence. |
| Use | Is the preparation of J acid, BIS J acid, phenyl J acid and scarlet acid intermediates |
118-33-2 - Risk and Safety
| UN IDs | 1759 |
| Hazard Class | 8 |
| Packing Group | III |
118-33-2 - Reference Information
| LogP | -1.85 |
| EPA chemical information | Information provided by: ofmpub.epa.gov (external link) |
| introduction | 2-naphthylamine -5, 7-disulfonic acid is a white glossing prismatic needle-shaped crystal, and the crystals precipitated from water contain 5 molecules of crystal water. The solubility in water at 20 ℃ is 23%. Its monosodium salt and mono-potassium salt are commonly used in industry, both of which are soluble in water, and the salt solution has green fluorescence. |
| Application | 2-naphthylamine -5, 7-disulfonic acid is an intermediate of dyes, used to produce J acid, bis-J acid, phenyl J acid and The intermediate of scarlet acid is mainly used in the laboratory research and development process. |
| use | 2-naphthylamine -5,7-disulfonic acid, also called 2-amino -5,7-naphthyldisulfonic acid, is an organic intermediate, and it has been reported in the literature that it can be used to prepare Cy fluorescein and a polyimide blend dense dehumidification film. This product is an intermediate of dyes and is used to produce J acid. It is an intermediate for the preparation of J acid, bis-J acid, phenyl J acid and scarlet acid |
| Production method | It is obtained by hydrolysis of 2-naphthylamine-1, 5,7-trisulfonic acid. Sulfuric acid, sodium sulfate and 2-naphthylamine -1,5,7-trisulfonic acid are added to water, kept at 110-120 ℃ for 4 hours, cooled and filtered, washed with sodium sulfate solution, and the resulting filter cake is amino J acid monosodium salt. |
| category | toxic substances |
| toxicity classification | poisoning |
| acute toxicity | oral-rat LD50: 2000 mg/kg |
| stimulation data | skin-rabbit 2 mg/24 hours severe; Eye-rabbit 0.75 mg/24 hours severe |
| flammability hazard characteristics | combustible; combustion produces toxic nitrogen oxides and sulfur oxide smoke |
| storage and transportation characteristics | warehouse ventilation and low temperature drying |
| fire extinguishing agent | dry powder, foam, sand, carbon dioxide, mist water |
Last Update：2024-04-09 15:16:47
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View History
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