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ChemicalBook >> CAS DataBase List >>Direct Blue 71

Direct Blue 71

CAS No.
4399-55-7
Chemical Name:
Direct Blue 71
Synonyms
CI 34140;Blue BRR;SOLAR BLUE G;DurazolBlue2R;DIRECT BLUE 71;Direct Blue GLL;Optisal Blue RL;N.S.Fast Blue FR;DiazolLightBlueR;C.I.Directblue71
CBNumber:
CB7141269
Molecular Formula:
C40H28N7NaO13S4
Molecular Weight:
965.93
MDL Number:
MFCD00003971
MOL File:
4399-55-7.mol
MSDS File:
SDS
TDS File:
TDS
Last updated:2026-04-24 14:59:05
Product description Number Pack Size Price
Direct Blue 71 Dye content 50% 212407 50g $131
Direct Blue 71 Asreported 274073 100g $349
Direct Blue 71 Asreported 274073 250g $549
Direct Blue 71 Asreported 274073 500g $758
Direct Blue 71 Asreported 274073 1kg $1020
More product size

Direct Blue 71 Properties

storage temp. Refrigerator
solubility DMSO (Slightly, Sonicated), Methanol (Slightly, Sonicated)
form Powder
Colour Index 34140
color Black
λmax 594 nm
ε(extinction coefficient) ≥15000 at 283-289nm in water at 0.01g/L
≥30000 at 582-588nm in water at 0.01g/L
Major Application diagnostic assay manufacturing
hematology
histology
InChIKey QTTDXDAWQMDLOF-UHFFFAOYSA-J
SMILES [Na+].[Na+].[Na+].[Na+].Nc1ccc2c(O)c(N=Nc3ccc(N=Nc4ccc(N=Nc5cc(c6cccc(c6c5)S([O-])(=O)=O)S([O-])(=O)=O)c7ccccc47)c8ccc(cc38)S([O-])(=O)=O)c(cc2c1)S([O-])(=O)=O
CAS DataBase Reference 4399-55-7(CAS DataBase Reference)
FDA UNII MA5K8N8952
EPA Substance Registry System C.I. Direct Blue 71 (4399-55-7)
UNSPSC Code 12171500
NACRES NA.47

SAFETY

Risk and Safety Statements

Safety Statements  24/25
WGK Germany  3
TSCA  TSCA listed
HS Code  32041400
Storage Class 11 - Combustible Solids

Direct Blue 71 price More Price(40)

Manufacturer Product number Product description CAS number Packaging Price Updated Buy
Sigma-Aldrich 212407 Direct Blue 71 Dye content 50% 4399-55-7 50g $131 2026-04-30 Buy
Usbiological 274073 Direct Blue 71 Asreported 4399-55-7 100g $349 2026-06-03 Buy
Usbiological 274073 Direct Blue 71 Asreported 4399-55-7 250g $549 2026-06-03 Buy
Usbiological 274073 Direct Blue 71 Asreported 4399-55-7 500g $758 2026-06-03 Buy
Usbiological 274073 Direct Blue 71 Asreported 4399-55-7 1kg $1020 2026-06-03 Buy
Product number Packaging Price Buy
212407 50g $131 Buy
274073 100g $349 Buy
274073 250g $549 Buy
274073 500g $758 Buy
274073 1kg $1020 Buy

Direct Blue 71 Chemical Properties,Uses,Production

Chemical Properties

black powder

Uses

Direct blue 71 (CAS# 4399-55-7) is an organic triazo dye and a water-soluble pollutant. The decolourization of aqueous solutions of direct blue 71 has been achieved using a variety of methods, such as the use of Au-Nx-TiO2 nanospheres to achieve its photocatalytic degradation. Dyes and metabolites.

Preparation

3-Aminonaphthalene-1,5-disulfonic acid diazo, and Naphthalen-1-amine first coupling, its product to diazo, and 8-Aminonaphthalene-2-sulfonic acid second coupling, again diazo, in alkaline conditions and 7-Amino-4-hydroxynaphthalene-2-sulfonic acid third coupling.

Properties and Applications

dark blue. Blue gray powder. Soluble in water for blue, solubility of 10 g/L (60 ℃), 20 g/L (97 ℃), slightly soluble in soluble fiber element, soluble in ethanol, insoluble in other organic solvents. The strong sulfuric acid for blue to to black, red after diluted purple precipitation. Dye with strong hydrochloric acid solution for blue precipitation; Add thick sodium hydroxide solution for red light purple, have precipitation. Cellulose fiber of dyeing, dye devoured the gender is good, the temperature in the 80-100 ℃, affinity is the largest. Discharge sex is very good. In dye bath of copper ions in tiny change color (4 ~ 5 level), meet iron ion colored light basically unchanged (level 5). SDC classification for a class B. Cotton neutral white was a category 4, viscose neutral white for 4 ~ 5 level, cotton and viscose alkaline white are 5 levels. Widely used in viscose fiber dyeing, also used in viscose/PVA blends, cotton, and the carpet of dyeing and printing. Also used in leather, paper, soap, cheese, protein and formaldehyde resin color.

Standard Acid Resistance Alkali Resistance Light Fastness Soaping Water
Fading Stain Fading Stain
ISO 4 4-5 5 2 2
AATCC 2 4 4-5 1-2 2

Global( 188)Suppliers
Supplier Tel Email Country ProdList Advantage
Henan Fengda Chemical Co., Ltd 		+86-371-86557731 +86-13613820652 info@fdachem.com China 20122 58
Henan Tianfu Chemical Co.,Ltd. 		+86-0371-55170693 +86-19937530512 info@tianfuchem.com China 21587 55
Shanghai Time Chemicals CO., Ltd. 		+86-021-57951555 +8617317452075 jack.li@time-chemicals.com China 1803 55
career henan chemical co 		+86-0371-86658258 +8613203830695 sales@coreychem.com China 29815 58
Winchem industrial co limited 		+8613003762012 info@win-chemical.com China 300 58
CONIER CHEM AND PHARMA LIMITED 		+8618523575427 sales@conier.com China 49979 58
career henan chemical co 		+86-0371-86658258 +8613203830695 factory@coreychem.com China 29792 58
SIMAGCHEM CORP 		+86-5922680277 +86-13806087780 sale@simagchem.com China 17346 58
Hefei TNJ Chemical Industry Co.,Ltd. 		+86-0551-65418671 +8618949823763 sales@tnjchem.com China 34563 58
JADECHEM (NINGBO) CO.,LTD. 		574-89075960 info@jadechem-colours.com CHINA 214 58

View Lastest Price from Direct Blue 71 manufacturers

Image Update time Product Price Min. Order Purity Supply Ability Manufacturer
Direct Blue 71 pictures 2025-12-03 Direct Blue 71
4399-55-7
 25kg 1 20mt Winchem industrial co limited
Direct Blue 71 pictures 2025-09-25 Direct Blue 71
4399-55-7
 $5.00 1KG 98% Henan Fengda Chemical Co., Ltd
Direct Fast Blue B2RL, Direct Blue 71 pictures 2022-10-27 Direct Fast Blue B2RL, Direct Blue 71
4399-55-7
 $3.00 25kg 99% 20 tons TIANJIN XIANGRUI DYESTUFF CO.,LTD
DIRECT BLUE 71, PURE 3-[[4-[[4-[(6-Amino-1-hydroxy-3-sodiosulfo-2-naphthalenyl)azo]-6-sodiosulfo-1-naphthalenyl]azo]-1-naphthalenyl]azo]naphthalene-1,5-disulfonic acid disodium salt N.S.Fast Blue FR sirius light blue brr C.1.DirectBlue71(34140) C.I.Directblue71 DiazolLightBlueR DirectdeepblueL-3RB DirectfastblueB2RL DurazolBlue2R SiriusSupraBlueBRR SumilightSupraBlueBRR SOLAR BLUE G SOLANTINE BLUE FF Tetrasodium 3-[[4-[[4-[(6-amino-1-hydroxy-3-sulphonato-2-naphthyl)azo]-6-sulphonato-1-naphthyl]azo]-1-naphthyl]azo]naphthalene-1,5-disulphonate CI 34140 DIRECT BLUE 71 direct blue 71 (C.I. 34140) Direct Blue GLL 1,5-Naphthalenedisulfonic acid, 3-4-4-(6-amino-1-hydroxy-3-sulfo-2-naphthalenyl)azo-6-sulfo-1-naphthalenylazo-1-naphthalenylazo-, tetrasodium salt Fast Blue B2RL Atul Direct Supra Light Blue G Blue BRR Concorde Direct Blue B2R Diazine Fast Blue BRRL Direct Blue B2RL Direct Fast Blue B2R Direct Fast Blue B3RL Direct Fast Blue N-L2R Dyrect Fast Blue RD Helion Blue BRRL Intralite Blue FFC Optisal Blue RL Saturn Blue LBRR Solamine Light Blue BRRN Tertrodirect Light Blue R Triamin Blue BRR Vopsider Blue N-DL2R. Tetrasodium 3-[[4-[[4-[(6-amino-1-hydroxy-3-sulfonato-2-naphthyl)azo]-6-sulfonato-1-naphthyl]azo]-1-naphthyl]azo]naphthalene-1,5-disulfonate Tetrasodium 3-[4-[4-[(2E)-2-(6-amino-1-oxo-3-sulfonatonaphthalen-2-ylidene)hydrazinyl]-6-sulfonatonaphthalen-1-yl]diazenylnaphthalen-1-yl]diazenylnaphthalene-1,5-disulfonate Direct Fast Blue 71 Direct Blue 71 ISO 9001：2015 REACH C.I.Direct Blue 71:C.I.34140 Direct Fast Blue B2RL, Direct Blue 71 Direct Blue 71 (Technical Grade) 4399-55-7 C40H28N7NaO13S4 C40H23O13N7S4Na4 C40H23N7Na4O13S4 Organics Dyes and Pigments D Stains and Dyes Stains&Dyes, A to
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