Name | Sunyellow |
Synonyms | Sunyellow yellowembl C.I. 40000 Sun yellow CURCUMIN S zomineyellowr AFGHAN YELLOW Acid yellow 62 Direct Yellow R wogenalyellowcg paramineyellow2r vondacelyellowrn Direct Yellow 11 C.I. Acid Yellow 62 C.I.Direct Yellow 11 C.I. Direct Yellow 11 Acid yellow 62(C.I.40000) peeraminestilbeneyellowga disodium 6-hydroxy-5-[(E)-(4-sulfonatophenyl)diazenyl]naphthalene-2-sulfonate |
CAS | 1325-37-7 |
EINECS | 215-393-6 |
InChI | InChI=1/C16H12N2O7S2.2Na/c19-15-8-1-10-9-13(27(23,24)25)6-7-14(10)16(15)18-17-11-2-4-12(5-3-11)26(20,21)22;;/h1-9,19H,(H,20,21,22)(H,23,24,25);;/q;2*+1/p-2/b18-17+; |
Molecular Formula | C16H10N2Na2O7S2 |
Molar Mass | 452.37 |
Storage Condition | Room Temprature |
Stability | Stable. May be flammable. |
Physical and Chemical Properties | Brown powder. Water-soluble red yellow, slightly soluble in ethylene glycol ether, insoluble in other organic solvents. Its aqueous solution with concentrated hydrochloric acid was olive-yellow; Concentrated sodium hydroxide produced a gold-orange precipitate. Dark red in concentrated sulfuric acid, diluted dark yellow, with Brown precipitation. Partially dissolved in concentrated nitric acid, yellow-brown to olive-colored. Partially dissolved in concentrated hydrochloric acid was black. The staining color was green when copper ion was encountered, slightly dark red when iron ion was encountered, and turned to light yellow orange when zinc ion and ammonia were encountered. |
Hazard Symbols | Xi - Irritant |
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 - Wear suitable protective clothing. |
EPA chemical information | Information provided by: ofmpub.epa.gov (external link) |
use | direct yellow r can be used for dyeing cotton, viscose fiber and their knitwear to obtain bright red and yellow. Levelness and migration are poor. After dyeing, it needs to be treated with fixing agent to improve wet fastness. It is mostly used for dyeing viscose fiber and silk interwoven fabric. It can also be used for dyeing silk and wool. This product has a strong light brittle effect. Used for dyeing paper and cotton fabric |
Production method | Using 5-nitroo-toluenesulfonic acid as raw material, it is heated in an aqueous solution of sodium hydroxide, and the self-condensation reaction occurs to obtain the product. Due to different sodium hydroxide concentration, reaction temperature, and reaction time, various yellow dyes or dye mixtures can be obtained. |
toxic substance data | information provided by: pubchem.ncbi.nlm.nih.gov (external link) |