8-Amino-1-naphthol-3,6-disulfonic acid monosodium salt monohydrate
monosodium salt monohydrate,H Acid
CAS: 5460-09-3
Molecular Formula: C10H10NNaO7S2
8-Amino-1-naphthol-3,6-disulfonic acid monosodium salt monohydrate - Names and Identifiers
| Name | monosodium salt monohydrate,H Acid |
| Synonyms | H Acid monosodium salt monohydrate,H Acid 4-amino-5-hydroxynaphthalene-2,7-disulfonate 4-amino-5-hydroxynaphthalene-2,7-disulfonic acid SODIUM 4-AMINO-5-HYDROXY-2,7-NAPHTHALENEDISULFONATE Monosodium 4-amino-5-hydroxy-2,7,-naphthalenedisulfonate sodium hydrogen 4-amino-5-hydroxynaphthalene-2,7-disulfonate 4-Amino-5-hydroxy-2,7-naphthalenedisulfonic acid sodium salt sodium 5-amino-4-hydroxy-7-sulfonaphthalene-2-sulfonate hydrate 2,7-Naphthalenedisulfonicacid,4-amino-5-hydroxy-,monosodiumsalt 1-Amino-8-hydroxy-3,6-naphthalenedisulfonic acid, monosodium salt 8-Amino-1-naphthol-3,6-disulfonic acid monosodium salt monohydrate |
| CAS | 5460-09-3 |
| EINECS | 226-736-4 |
| InChI | InChI=1/C10H9NO7S2.Na.H2O/c11-8-3-6(19(13,14)15)1-5-2-7(20(16,17)18)4-9(12)10(5)8;;/h1-4,12H,11H2,(H,13,14,15)(H,16,17,18);;1H2/q;+1;/p-1 |
8-Amino-1-naphthol-3,6-disulfonic acid monosodium salt monohydrate - Physico-chemical Properties
| Molecular Formula | C10H10NNaO7S2 |
| Molar Mass | 343.3 |
| Melting Point | >300°C |
| Water Solubility | slightly soluble |
| Solubility | Easily soluble in hot water, soluble in alkali solution, hardly soluble in cold water, slightly soluble in alcohol and ether |
| Appearance | White or off-white powder or needle crystal |
| Color | Grayish Brown |
| Storage Condition | Store below +30°C. |
| Sensitive | Sensitive to light |
| MDL | MFCD00150460 |
| Physical and Chemical Properties | Gray crystalline powder. |
| Use | Mainly used for the production of acidic, direct and reactive dyes |
8-Amino-1-naphthol-3,6-disulfonic acid monosodium salt monohydrate - Risk and Safety
| Risk Codes | 36/37/38 - Irritating to eyes, respiratory system and skin. |
| Safety Description | 24/25 - Avoid contact with skin and eyes. |
| HS Code | 29222100 |
8-Amino-1-naphthol-3,6-disulfonic acid monosodium salt monohydrate - Nature
Open Data Verified Data
gray crystalline powder. Soluble in water, ethanol, ethyl ether and alkali and caustic soda and other alkaline solution, the alkaline solution was dark green, brown red ferric chloride.
Last Update：2024-01-02 23:10:35
8-Amino-1-naphthol-3,6-disulfonic acid monosodium salt monohydrate - Preparation Method
Open Data Verified Data
from naphthalene with fuming sulfuric acid sulfonation of 1,3,6 A naphthalene three sulfonic acid, and then with mixed acid nitration of 1 A Nitro 3,6,8 A naphthalene three sulfonic acid, then it is neutralized with ammonium hydroxide and reduced with iron powder to give 1-amino -3,6,8-triammonium naphthalene trisulfonic acid salt. After pressure filtration, sulfuric acid is added for analysis, Na2 C03 is dissolved, filtered, alkali melted, obtained by acid analysis.
Last Update：2022-01-01 10:56:34
8-Amino-1-naphthol-3,6-disulfonic acid monosodium salt monohydrate - Introduction
An indicator for the determination of halogens by the mercury method.
Last Update：2022-10-16 17:26:11
8-Amino-1-naphthol-3,6-disulfonic acid monosodium salt monohydrate - Use
Open Data Verified Data
One of the important intermediates in the dye industry, used in the production of other dye intermediates, such as chromotropic acid, acetyl H acid and benzoyl H acid. In addition, can also be used for pharmaceutical.
Last Update：2022-01-01 10:56:33
8-Amino-1-naphthol-3,6-disulfonic acid monosodium salt monohydrate - Safety
Open Data Verified Data
- toxic, long-term inhalation can stimulate the mucous membrane, causing chest tightness, shortness of breath, Cough, dizziness, Fatigue, numbness of mouth and tongue, collapse, nails and face blue and other symptoms. Operators should wear labor protection equipment, the production process should pay attention to labor protection, strengthen ventilation and regular washing clothes.
- the container is packed in a plastic bag with a net weight of 50kg per barrel. Store in a cool, ventilated, dry place. Pay attention to moisture. According to the provisions of the storage and transportation of toxic chemicals.
Last Update：2022-01-01 10:56:35
8-Amino-1-naphthol-3,6-disulfonic acid monosodium salt monohydrate - Reference Information
| LogP | -2.3 |
| EPA chemical information | Information provided by: ofmpub.epa.gov (external link) |
| Uses | Mainly used to produce acidic, direct and reactive dyes Used as an indicator for the determination of halogens by mercury, and also used as an azo dye intermediate This product is an important dye intermediate. |
| Production method | The production of H acid monosodium salt from naphthalene as raw material includes the following steps:(1) Naphthalene sulfonation to obtain 1,3, 6-naphthalene sulfonic acid;(3) Nitration mixture is neutralized with ammonia water;(4) The neutralization product nitronaphthalene trisulfonic acid triammonium salt is reduced, and the acidified product T acid is precipitated with sulfuric acid and salt;(5) T acid is converted into sodium salt, alkali fusion and acid precipitation to obtain H acid monosodium salt: There are many steps to prepare H acid monosodium salt from naphthalene, and the total yield is generally 46%-50%. Industrial products are light gray to gray paste, and the content of H acid monosodium salt is 42%. The content of the powdered H-acid monosodium salt is above 83.5% (GB-1648-84) |
Last Update：2024-04-10 22:29:15
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