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Reactive Black Kn-B
Reactive Black KN-B / CAS : 17095-24-8
| Appearance | Black powder. The aqueous solution is blue and black. The color remains unchanged after adding 1mol / L sodium hydroxide. After adding insurance powder and warming it to yellowish brown, the color cannot be restored to the original color after adding sodium perborate. It is blue-green in concentrated sulfuric acid and bluish gray after dilution; It is brown in concentrated nitric acid and light brown after dilution. | UN | 0.0 |
| HS | 32041600 | DG Class | 0.0 |
| Synonyms | Reactive Black 5; Remazol Black B; Remazole Black-GR; (Azo))-5-Amino-4-Hydroxy-,Di(Hydrogensulfate)Ester,Tetrasodiumsalt; 2,7-Naphthalenedisulfonicacid,3,6-(Bis(4-((2-Hydroxyethyl)Sulfonyl)Phenyl)Bis; 2,7-Naphthalenedisulfonicacid,4-Amino-5-Hydroxy-3,6-Bis[[4-[[2-(Sulfooxy)Ethy; C.I.Reactiveblack5 | ||
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RFQ
Properties
Summary
Formula
C26H21N5Na4O19S6
Molecular Mass
991.81600
Exact Mass
990.87500
PSA
461.51000
Logp
8.33360
IUPAC
tetrasodium;4-amino-5-hydroxy-3,6-bis[[4-(2-sulfonatooxyethylsulfonyl)phenyl]diazenyl]naphthalene-2,7-disulfonate
SMILES
C1=CC(=CC=C1N=NC2=C(C3=C(C(=C(C=C3C=C2S(=O)(=O)[O-])S(=O)(=O)[O-])N=NC4=CC=C(C=C4)S(=O)(=O)CCOS(=O)(=O)[O-])N)O)S(=O)(=O)CCOS(=O)(=O)[O-].[Na+].[Na+].[Na+].[Na+]
Attribute classification
Matter Classification
organic
Category
Dyestuffs and Pigments > Reactive Dyes
Chemical and Physical Properties
Melting Point
>300 °C(lit.)
Density
1.21 g/cm3 at 20 °C
Appearance
Black powder. The aqueous solution is blue and black. The color remains unchanged after adding 1mol / L sodium hydroxide. After adding insurance powder and warming it to yellowish brown, the color cannot be restored to the original color after adding sodium perborate. It is blue-green in concentrated sulfuric acid and bluish gray after dilution; It is brown in concentrated nitric acid and light brown after dilution.
Export information
HS Code
32041600
Export Rebate
0%
UN No.
0.0
DG-Class
0.0
Risk Code
42-42/43
Safety Label
Xn
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