1-Naphthylamine-6-Sulfonic Acid
5-amino-2-naphthalenesulfonic acid
CAS: 119-79-9;51548-48-2
Molecular Formula: C10H9NO3S
1-Naphthylamine-6-Sulfonic Acid - Names and Identifiers
| Name | 5-amino-2-naphthalenesulfonic acid |
| Synonyms | 1,6-CLEVES ACID 1,6-Cleves Acid Cleves acid 1,6 1,6-CLEVE'S ACID 1-naphthylamine-6-sulfonic Aminonaphtalenesulfonicacid 1-Naphthalene -6-sulfonic acid 1-Naphthylamine-6-Sulfonic Acid 1-Naphthylamine-6-sulphonic acid 5-amino-2-naphthalenesulfonicaci 5-amino-2-naphthalenesulfonic acid 1-Aminonaphthalene-6-Sulfonic Acid 2-Naphthalenesulfonicacid,5-amino- 5-aminonaphthalene-2-sulfonic acid 1-amino-6-naphthalenesulfonic acid 5-Aminonaphthalene-2-sulphonic acid 2-Naphthalenesulfonic acid, 5-amino- (5or8)-aminonaphthalene-2-sulphonic acid |
| CAS | 119-79-9 51548-48-2 |
| EINECS | 204-351-2 |
| InChI | InChI=1/C10H9NO3S/c11-10-3-1-2-7-6-8(15(12,13)14)4-5-9(7)10/h1-6H,11H2,(H,12,13,14) |
1-Naphthylamine-6-Sulfonic Acid - Physico-chemical Properties
| Molecular Formula | C10H9NO3S |
| Molar Mass | 223.25 |
| Density | 1.3588 (rough estimate) |
| Melting Point | >300°C |
| Water Solubility | 1g/L(16 ºC) |
| Solubility | soluble100mg/mL, clear, brown (1N NH4OH) |
| Vapor Presure | 0Pa at 25℃ |
| Appearance | Crystallization |
| Color | Purple |
| Merck | 14,2350 |
| BRN | 1819887 |
| pKa | pK1: 3.80 (25°C) |
| Storage Condition | Refrigerator |
| Refractive Index | 1.6500 (estimate) |
| MDL | MFCD00004030 |
| Physical and Chemical Properties | Character needle-like crystal. solubility insoluble in ethanol and ether. Soluble in ammonia. |
| Use | For the preparation of azo dyes and sulfur dyes, such as direct sun-resistant blue BGL, sulfide blue CV, etc |
1-Naphthylamine-6-Sulfonic Acid - Risk and Safety
| Risk Codes | 36/37/38 - Irritating to eyes, respiratory system and skin. |
| 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. S24/25 - Avoid contact with skin and eyes. |
| UN IDs | 1759 |
| WGK Germany | 1 |
| RTECS | QK1285000 |
| TSCA | Yes |
| HS Code | 29309090 |
| Hazard Class | 8 |
| Packing Group | III |
1-Naphthylamine-6-Sulfonic Acid - Upstream Downstream Industry
| Raw Materials | Sulfuric acid Naphthalene Iron Nitric acid |
1-Naphthylamine-6-Sulfonic Acid - Nature
Open Data Verified Data
colorless needle-like crystals. Slightly soluble in water. 1, the melting point of 6 amino Naphthalene sulfonic acid is greater than 330.
Last Update：2024-01-02 23:10:35
1-Naphthylamine-6-Sulfonic Acid - Preparation Method
Open Data Verified Data
refined naphthalene is sulfonated to obtain 2-naphthalenesulfonic acid, and nitrated to form 1-nitro -6(7)-naphthalenesulfonic acid, which is then reduced to obtain the finished product. Can use 1,6 and 1,7 amino Naphthalene sulfonic acid magnesium salt in a certain temperature solubility difference to be separated.
Last Update：2022-01-01 10:56:23
1-Naphthylamine-6-Sulfonic Acid - Use
Open Data Verified Data
This product is mainly used for the manufacture of direct light blue B2R, RGL, BGL, direct light ash LBN, direct light brown RTL and direct black FF and other dyes. It is also used in the manufacture of azo dyes such as sulfur blue CV, and processing into neutral dye intermediates.
Last Update：2022-01-01 10:56:22
1-Naphthylamine-6-Sulfonic Acid - Safety
Open Data Verified Data
- toxic, rat oral LD50 14mg/kg. Production equipment should be closed, the operator should wear protective equipment.
- the container is packed in a plastic bag lined with a barrel or an iron drum. 50kg per barrel. Store in a cool, dry, ventilated place, avoid sun exposure, prevent moisture, heat. According to the provisions of toxic substances storage and transportation.
Last Update：2022-01-01 10:56:23
1-Naphthylamine-6-Sulfonic Acid - Reference Information
| dissociation constant | 0 at 39 ℃ |
| NIST chemical information | Information provided by: webbook.nist.gov (external link) |
| EPA chemical information | Information provided by: ofmpub.epa.gov (external link) |
| Introduction | 5-aminonaphthalene-2-sulfonic acid is a carboxylic acid derivative and can be used as an organic intermediate. |
| use | used to prepare azo dyes and sulfide dyes, such as direct sun-resistant blue BGL, sulfide blue CV, etc. this product is an intermediate of azo dyes and sulfide dyes. |
| Production method | Fine naphthalene is sulfonated to obtain 2-naphthalene sulfonic acid, which is nitrated to form 1-nitro-6-naphthalene sulfonic acid and 1-Nitro-7-naphthalene sulfonic acid mixture. The mixed nitronaphthalene sulfonic acid is used in magnesium carbonate to form magnesium salt, and then reduced with iron powder to obtain the mixed magnesium aminonaphthalene sulfonic acid using the difference in solubility of the two isomers of magnesium salt at a certain temperature Separation, after separation, acid analysis to obtain 1, 6-klevic acid and 1, 7-klevic acid respectively. |
| category | toxic substances |
| toxicity classification | low toxicity |
| acute toxicity | oral-rat LD50: 14200 mg/kg |
| stimulation data | eyes-rabbit 500 mg/24 hours mild |
| 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：2024-04-10 22:29:15
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View History
1-Naphthylamine-6-Sulfonic Acid
Ceramide
N-Benzoyl-hexahydro-4-azepin-4-one
(METHYLMERCAPTO)ACETALDEHYDE DIMETHYL ACETAL
NSC19430
Benzene, 1-fluoro-4-[(4-nitrophenyl)thio]-
D3-Methomyl
d-glucuronq-3,6-lactone
RARECHEM AL BO 0048
140148-70-5
Ceramide
N-Benzoyl-hexahydro-4-azepin-4-one
(METHYLMERCAPTO)ACETALDEHYDE DIMETHYL ACETAL
NSC19430
Benzene, 1-fluoro-4-[(4-nitrophenyl)thio]-
D3-Methomyl
d-glucuronq-3,6-lactone
RARECHEM AL BO 0048
140148-70-5
Raw Materials for 1-Naphthylamine-6-Sulfonic Acid