C.I. Direct Red 81, disodium salt
direct red 81
CAS: 2610-11-9
Molecular Formula: C29H19N5Na2O8S2
C.I. Direct Red 81, disodium salt - Names and Identifiers
| Name | direct red 81 |
| Synonyms | C.I. 28160 direct red 81 Solaminrot 4B Direct Red 81 Chlorantine Fast Red 5B C.I. Direct Red 81 (7CI) Chloroantine fast red 5B C.I. Direct Red 81 (VAN) C.I. Direct Red 81 disodium salt C.I. Direct Red 81, disodium salt disodium 4-hydroxy-7-[(phenylcarbonyl)amino]-3-[(E)-{4-[(E)-(4-sulfonatophenyl)diazenyl]phenyl}diazenyl]naphthalene-2-sulfonate |
| CAS | 2610-11-9 |
| EINECS | 220-028-9 |
| InChI | InChI=1/C29H21N5O8S2.2Na/c35-28-25-15-12-23(30-29(36)18-4-2-1-3-5-18)16-19(25)17-26(44(40,41)42)27(28)34-33-21-8-6-20(7-9-21)31-32-22-10-13-24(14-11-22)43(37,38)39;;/h1-17,35H,(H,30,36)(H,37,38,39)(H,40,41,42);;/q;2*+1/p-2/b32-31+,34-33+; |
C.I. Direct Red 81, disodium salt - Physico-chemical Properties
| Molecular Formula | C29H19N5Na2O8S2 |
| Molar Mass | 675.6 |
| Melting Point | 240℃ |
| Storage Condition | Room Temprature |
| MDL | MFCD00003949 |
| Physical and Chemical Properties | Chemical brown powder. Good water solubility, soluble in ethylene glycol ether, slightly soluble in ethanol, insoluble in other organic solvents. Its aqueous solution is magenta, adding concentrated hydrochloric acid to produce yellow olive brown precipitate, adding concentrated alkali to produce purple precipitate. It is dark blue in concentrated sulfuric acid, and it produces light orange-brown precipitate after dilution; it is bright blue in concentrated nitric acid and turns red and light brown. In dyeing, the color light of iron ions is basically unchanged, and the color light of copper ions is slightly darker. |
| Use | Use Direct sun-resistant red 4B is used for dyeing and direct printing of cotton and viscose fabric, and the ground color is dyed blue and red. It has good dyeing and levelness, good hiding power for viscose filaments with uneven quality, and poor dyeing rate. It is also used for dyeing silk and high-temperature dyeing polyester-viscose blended fabrics in the same bath with disperse dyes. |
C.I. Direct Red 81, disodium salt - Risk and Safety
| WGK Germany | 3 |
| RTECS | QK1370000 |
C.I. Direct Red 81, disodium salt - Upstream Downstream Industry
| Raw Materials | P-PHENYLAZOBENZENESULFONIC ACID Benzoyl J acid Benzoyl J acid 4'-Aminoazobenzene-4-sulphonic acid |
C.I. Direct Red 81, disodium salt - Nature
| color index | 28160 |
| EPA chemical information | C. I. Direct Red 81 disodium salt (2610-11-9) |
Last Update：2024-04-10 22:29:15
C.I. Direct Red 81, disodium salt - Production method
Using p-aminoazobenzene sulfonic acid and N-benzoyl J acid as raw materials, the p-aminoazobenzene sulfonic acid is first diazotized, and then coupled with N-benzoyl J acid to obtain the product. The finished product is salted out, filtered, dried and crushed.
Last Update：2024-04-10 22:29:15
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Product Name: Chlorantine Fast Red 5B Visit Supplier Webpage Request for quotationCAS: 2610-11-9
Tel: +86-18821248368
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Product Name: Direct Red 81 Visit Supplier Webpage Request for quotationCAS: 2610-11-9
Tel: 609-228-6898
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Mobile: 609-228-6898
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Product Name: Chlorantine Fast Red 5B Visit Supplier Webpage Request for quotationCAS: 2610-11-9
Tel: +86-400-900-4166
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Mobile: +86-18621343501
QQ: 2881950922
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Raw Materials for C.I. Direct Red 81, disodium salt