disodium 6-hydroxy-5-[[2-hydroxy-3-[(2-hydroxynaphthyl)azo]-5-sulphonatophenyl]azo]naphthalene-2-sulphonate
![disodium 6-hydroxy-5-[[2-hydroxy-3-[(2-hydroxynaphthyl)azo]-5-sulphonatophenyl]azo]naphthalene-2-sulphonate Structure](CAS/GIF/3258-74-0.gif)
- CAS No.
- 3258-74-0
- Chemical Name:
- disodium 6-hydroxy-5-[[2-hydroxy-3-[(2-hydroxynaphthyl)azo]-5-sulphonatophenyl]azo]naphthalene-2-sulphonate
- Synonyms
- C.I.21725;Acid Alizarine Black;C.I.Mordant Black 25;C.I.Mordant Black 25:C.I.21725;disodium 6-hydroxy-5-[[2-hydroxy-3-[(2-hydroxynaphthyl)azo]-5-sulphonatophenyl]azo]naphthalene-2-sulphonate;6-Hydroxy-5-[[2-hydroxy-3-[(2-hydroxy-1-naphtyl)azo]-5-sulfophenyl]azo]-2-naphthalenesulfonic acid disodium salt;2-Naphthalenesulfonic acid, 6-hydroxy-5-[[2-hydroxy-3- [(2-hydroxy-1-naphthalenyl)azo]-5-sulfophenyl]azo ]-, disodium salt;disodium,(5Z)-5-[[2-hydroxy-3-[(2Z)-2-(2-oxonaphthalen-1-ylidene)hydrazinyl]-5-sulfonatophenyl]hydrazinylidene]-6-oxonaphthalene-2-sulfonate
- CBNumber:
- CB7891858
- Molecular Formula:
- C26H16N4Na2O9S2
- Molecular Weight:
- 638.53618
- MDL Number:
- MOL File:
- 3258-74-0.mol
disodium 6-hydroxy-5-[[2-hydroxy-3-[(2-hydroxynaphthyl)azo]-5-sulphonatophenyl]azo]naphthalene-2-sulphonate Chemical Properties,Uses,Production
Preparation
3,5-Diamino-4-hydroxybenzenesulfonic acid double nitrogen, add Sodium hydroxide make show weak alkaline, in order to make molecules of chlorine is hydroxyl replaced, then first and 6-Hydroxynaphthalene-2-sulfonic acid coupling, again with Naphthalen-2-ol coupling.
Properties and Applications
blue black. Soluble in water for purple to Copenhagen blue, slightly soluble in ethanol for dark purple, not soluble in Acetone. In concentrated sulfuric acid to deep purple, dilution after brown light orange. Dye aqueous solution to join concentrated hydrochloric acid to brown light orange, Join concentrated sodium hydroxide solution for purple.
| Standard | Ironing Fastness | Light Fastness | Fulling | Persperation Fastness | Soaping | Water | |
| Alkali | Acid | ||||||
| ISO | 5 | 7 | 5 | 4-5 | 4 | 5 | 5 |
disodium 6-hydroxy-5-[[2-hydroxy-3-[(2-hydroxynaphthyl)azo]-5-sulphonatophenyl]azo]naphthalene-2-sulphonate Preparation Products And Raw materials
Raw materials
Preparation Products
6-Hydroxy-5-[[2-hydroxy-3-[(2-hydroxy-1-naphtyl)azo]-5-sulfophenyl]azo]-2-naphthalenesulfonic acid disodium salt
Acid Alizarine Black
C.I.21725
C.I.Mordant Black 25
disodium 6-hydroxy-5-[[2-hydroxy-3-[(2-hydroxynaphthyl)azo]-5-sulphonatophenyl]azo]naphthalene-2-sulphonate
2-Naphthalenesulfonic acid, 6-hydroxy-5-[[2-hydroxy-3- [(2-hydroxy-1-naphthalenyl)azo]-5-sulfophenyl]azo ]-, disodium salt
C.I.Mordant Black 25:C.I.21725
disodium,(5Z)-5-[[2-hydroxy-3-[(2Z)-2-(2-oxonaphthalen-1-ylidene)hydrazinyl]-5-sulfonatophenyl]hydrazinylidene]-6-oxonaphthalene-2-sulfonate
3258-74-0
Organics