Sodium 4-[(2-hydroxy-1-naphthyl)azo]benzenesulphonate
acid orange 7
CAS: 633-96-5
Molecular Formula: C16H11N2NaO4S
Sodium 4-[(2-hydroxy-1-naphthyl)azo]benzenesulphonate - Names and Identifiers
| Name | acid orange 7 |
| Synonyms | Orange Ⅱ C.I. 15510 acid orange 7 C.I. Acid Orange 7 Pigment Orange 17 Acid Orange II Lake Orange II sodium salt C.I. Acid Orange 7, monosodium salt Sodium 4-[(2-hydroxy-1-naphthyl)azo]benzenesulphonate 4-(2-Hydroxy-1-naphthylazo)benzenesulfonic acid sodium salt sodium 4-[(E)-(2-hydroxynaphthalen-1-yl)diazenyl]benzenesulfonate sodium 4-[(2E)-2-(2-oxonaphthalen-1(2H)-ylidene)hydrazino]benzenesulfonate |
| CAS | 633-96-5 |
| EINECS | 211-199-0 |
| InChI | InChI=1/C16H12N2O4S.Na/c19-15-10-5-11-3-1-2-4-14(11)16(15)18-17-12-6-8-13(9-7-12)23(20,21)22;/h1-10,19H,(H,20,21,22);/q;+1/p-1/b18-17+ |
Sodium 4-[(2-hydroxy-1-naphthyl)azo]benzenesulphonate - Physico-chemical Properties
| Molecular Formula | C16H11N2NaO4S |
| Molar Mass | 350.32 |
| Melting Point | 164℃ |
| Water Solubility | 116 g/L (30℃) |
| Appearance | Form Crystalline Powder, color Green to blue |
| pKa | 8.26, 11.4(at 25℃) |
| MDL | MFCD00011657 |
| Physical and Chemical Properties | Melting point 164°C water-soluble 116g/L (30°C) |
| Use | Uses acid Orange II is mainly used for wool, silk, nylon dyeing and direct printing of fabrics, bright color, good levelness, but poor fastness. Also used for leather, paper and biological products coloring, pure food can be used as coloring, can also be used as an indicator. Can be combined with Acid Black 10B (C.I.Acid Black 1) to form Acid Black ATT. |
Sodium 4-[(2-hydroxy-1-naphthyl)azo]benzenesulphonate - Risk and Safety
| Hazard Symbols | Xi - Irritant |
| Risk Codes | R36/37/38 - 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. S37/39 - Wear suitable gloves and eye/face protection |
| WGK Germany | 3 |
| RTECS | DB7084000 |
| HS Code | 32041200 |
Sodium 4-[(2-hydroxy-1-naphthyl)azo]benzenesulphonate - Upstream Downstream Industry
Sodium 4-[(2-hydroxy-1-naphthyl)azo]benzenesulphonate - Reference
| Reference Show more | 1. Gao, Yudong, et al. "A simple and sensitive voltammetric method for the determination of orange II based on a functionalized graphene-modified electrode." Journal of AOAC International 99.5 (2016): 1287-1294.https://doi.org/10.5740/jaoacint.16-0138 2. [IF=1.913] Gao Yudong et al."A Simple and Sensitive Voltammetric Method for the Determination of Orange II Based on a Functionalized Graphene-Modified Electrode."J Aoac Int. 2016 Sep;99(5):1287-1294 3. [IF=7.514] Leilei Wu et al."Plasmonic nanoparticles on metal-organic framework: A versatile SERS platform for adsorptive detection of new coccine and orange II dyes in food."Food Chem. 2020 Oct;328:127105 Note: part of our products can only provide part of the information, our company does not guarantee the authority of the information provided, only for the customer reference Exchange research. storage conditions: 2-8 ℃ solubility: Soluble in water, ethanol. Appearance: orange crystal or powder Melting Point: 164°C 1G dissolved in 20ml of water, the aqueous solution is red-yellow, soluble in ethanol orange. Hydrochloric acid was added to the aqueous solution to produce a Brown yellow precipitate, which was dark brown when sodium hydroxide was added, red when sulfuric acid was added, and orange yellow precipitate when diluted. The maximum absorption wavelength was 484nm. Irritating. Copper ion tends to be red and dark when dyed, and iron ion is light and dark in color. Good discharge. pH discoloration range 7.4 (Amber) to 8.6 (orange); 10.2 (orange) to 11.8 (red) |
Sodium 4-[(2-hydroxy-1-naphthyl)azo]benzenesulphonate - Uses and synthesis methods
use
1. It is mainly used for dyeing silk and wool fabrics, as well as leather and paper. Nylon can be dyed in formic acid bath. The product can be printed directly on wool, silk nylon, and can also be used as an indicator and biocoloring.
2, acid-base indicator, pH color change range 7.4 (amber) ~ 8.6 (orange);10.2 (orange) ~ 11.8 (red); Cationic surfactant for extraction and photometric determination; Biological stain
production method
1. Sodium diaminobenzenesulfonate is diazotized, coupled with -2-naphthol, and salted out. Process: Add about 15% concentration of sodium p-aminobenzenesulfonate solution (1003kg) and 30-35% concentration of sodium nitrite solution (100ikg) into the mixing barrel and stir well. Add 600L of water to the diazonium bucket. Add a proper amount of ice, add 264kg of 30% hydrochloric acid under stirring, control the temperature to 10-15 ℃, uniformly add the materials in the mixing barrel to the diazonium barrel at about 10min, and stir for 0.5h under the conditions of 10-15 ℃, maintaining excessive acid and slightly excessive nitrous acid, to obtain nitrogen as suspension. Add 400L of water and 141.8kg of 2-naphthol into the coupling barrel, add 143kg of liquid alkali (30%) under stirring, raise the temperature to 45-50 ℃, dissolve it, add ice to cool it to 8 ℃, add 19kg of salt, and quickly add half of the total amount of diazonium salt. Add 37kg of salt, then add the other half of diazonium salt evenly within 1h, and adjust the pH. 1 Stir for 1h, add 75kg of salt, and continue stirring until diazonium salt disappears to the end of coupling (about 1h). Press filter, the filter cake is dried at 100-105 ℃. 880kg of standardized dye was obtained. 2-naphthol 352 sodium carbonate (98%) 57 sodium p-aminobenzenesulfonate (100%) 496 hydrochloric acid (31%) 97 sodium nitrite (98%) 175 sodium sodium sodium sulfate (100%) 255 refined salt 70 sodium hydroxide (100%) 96 taikao oil 11
2. Using p-aminobenzene sulfonic acid and 2-naphthol as raw materials, diazotize p-aminobenzene sulfonic acid and couple with 2-naphthol to obtain the product. The finished product is salted out, filtered, dried and crushed..
firstly, 15% p-aminobenzenesulfonic acid solution (containing 173kg of p-aminobenzenesulfonic acid) and 30% sodium nitrite solution (containing 69kg of NaNO2) are mixed evenly, 600L of water and 264kg of hydrochloric acid (30%) are added into a diazonium pot, ice is added to control the temperature to 10-15 ℃, the above mixed solution is added within 10min, and.
add 400L of water, 141.8kg 2-naphthol and 143kg of 30% liquid alkali to the coupling pot, raise the temperature to 45-50 ℃, stir and dissolve, cool the temperature to 8 ℃, add 19kg of salt, and quickly add 1/2 of diazonium liquid. Add 37kg of salt, add another 1/2 amount of diazonium solution within 1h, continue stirring for 1h, add 75kg of salt, and continue stirring to the end of coupling. Filtered, dried product.
Last Update：2024-04-10 22:29:15
Sodium 4-[(2-hydroxy-1-naphthyl)azo]benzenesulphonate - Nature
| color index | 15510 |
| Odor | Odorless |
| pH range of acid-base indicator discoloration | Amber (7.4) to orange (8.6);Orange (10.2) to red (11.8) |
| water solubility | 116 g/L (30 °C) |
| maximum wavelength (& lambda;max) | 483nm |
| Merck | 14,6858 |
| BRN | 3898201 |
| biological applications | Cosmetics; wound dressing materials |
| main applications | Organic light emitting diodes (OLEDs), nanoparticles, inks, wood preservatives, textiles, hair dyes, cosmetics, wound dressing materials, biofuel cells |
| EPA chemical information | C. I. Acid Orange 7, monosodium salt (633-96-5) |
Last Update：2024-04-09 19:04:55
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Raw Materials for Sodium 4-[(2-hydroxy-1-naphthyl)azo]benzenesulphonate
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