Direct yellow
Direct Yellow 4
CAS: 3051-11-4
Molecular Formula: C26H18N4Na2O8S2
Direct yellow - Names and Identifiers
| Name | Direct Yellow 4 |
| Synonyms | C.I. 24890 DIRECT YELLOW Direct Yellow 4 26 DIRECT YELLOW 26 44 DIRECT YELLOW 44 27 DIRECT YELLOW 27 83 DIRECT YELLOW 83 50 DIRECT YELLOW 50 BRILLIANT YELLOW SODIUM C.I. Direct Yellow 4 (VAN) C.I. Direct Yellow 4, disodium salt C.I. Direct Yellow 4, disodium salt (8CI) sodium 4,4'-bis(p-hydroxyphenylazo)-2,2'-vinylenedibenzenesulphonate 2,2'-ethene-1,2-diylbis{5-[2-(4-oxocyclohexa-2,5-dien-1-ylidene)hydrazino]benzenesulfonic acid} 2,2'-(E)-ethene-1,2-diylbis{5-[2-(4-oxocyclohexa-2,5-dien-1-ylidene)hydrazino]benzenesulfonic acid} disodium 2,2'-(E)-ethene-1,2-diylbis{5-[2-(4-oxocyclohexa-2,5-dien-1-ylidene)hydrazino]benzenesulfonate} |
| CAS | 3051-11-4 |
| EINECS | 221-267-1 |
| InChI | InChI=1/C26H20N4O8S2/c31-23-11-7-19(8-12-23)27-29-21-5-3-17(25(15-21)39(33,34)35)1-2-18-4-6-22(16-26(18)40(36,37)38)30-28-20-9-13-24(32)14-10-20/h1-16,29-30H,(H,33,34,35)(H,36,37,38) |
Direct yellow - Physico-chemical Properties
| Molecular Formula | C26H18N4Na2O8S2 |
| Molar Mass | 624.55 |
| Density | 1.5g/cm3 |
| Melting Point | >250°C |
| Water Solubility | Partially soluble in water |
| Solubility | Solubility Soluble in water; slightly soluble in ethanol, acetone |
| Appearance | Yellow-orange powder, odorless |
| Color | Orange |
| Odor | Odorless |
| Maximum wavelength(λmax) | ['497nm'] |
| BRN | 4122338 |
| Storage Condition | Amber Vial, Refrigerator |
| Stability | Light Sensitve |
| Refractive Index | 1.691 |
| MDL | MFCD00007489 |
Direct yellow - Risk and Safety
| Safety Description | S22 - Do not breathe dust. S24/25 - Avoid contact with skin and eyes. |
| WGK Germany | 3 |
| HS Code | 32041400 |
Direct yellow - Reference Information
| color index | 24890 |
| pH indicator color change ph range | yellow (6.4) to red-orange (8.0) |
| main applications | Display device, sensors, photochromic materials, inks, detergent, cosmetics, biosensors, say for enzyme activity, antifungal agent, antiAIDS agent |
| EPA chemical information | Information provided by: ofmpub.epa.gov (external link) |
Last Update：2024-04-09 20:49:11
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