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Direct Red 23

Direct Red 23 Structure
Direct Red 23 structure
CAS No.
3441-14-3
Chemical Name:
Direct Red 23
Synonyms
DIRECT FAST SCARLET 4BS;redemb;redembl;CI 29160;disodiumsa;fastred4bs;scarlet4bs;disodiumsal;Directred4BS;polycorredse
CBNumber:
CB3333402
Molecular Formula:
C35H28N7NaO10S2
Molecular Weight:
793.76
MDL Number:
MFCD00003946
MOL File:
3441-14-3.mol
MSDS File:
SDS
TDS File:
TDS
Last updated:2026-04-24 14:58:46
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Direct Red 23 Properties

storage temp. room temp
Colour Index 29160
form powder
λmax 507 nm
ε(extinction coefficient) ≥15000 at 500-516nm in water at 0.04g/L
Major Application diagnostic assay manufacturing
hematology
histology
Cosmetics Ingredients Functions HAIR DYEING
InChIKey NLMHXPDMNXMQBY-UHFFFAOYSA-L
SMILES [Na+].[Na+].CC(=O)Nc1ccc(cc1)N=Nc2cc3c(O)cc(NC(=O)Nc4ccc5c(O)c(N=Nc6ccccc6)c(cc5c4)S([O-])(=O)=O)cc3cc2S([O-])(=O)=O
CAS DataBase Reference 3441-14-3(CAS DataBase Reference)
EWG's Food Scores 1-4
FDA UNII V7W6L6R35U
EPA Substance Registry System C.I. Direct Red 23, disodium salt (3441-14-3)
UNSPSC Code 12171500
NACRES NA.47

SAFETY

Risk and Safety Statements

PPE Eyeshields, Gloves, type N95 (US)
WGK Germany  2
RTECS  QK1237500
TSCA  TSCA listed
Storage Class 11 - Combustible Solids

Direct Red 23 price More Price(9)

Manufacturer Product number Product description CAS number Packaging Price Updated Buy
Sigma-Aldrich 212490 Direct Red 23 Dye content 30% 3441-14-3 50g $89.2 2026-04-30 Buy
ChemScene CS-0010153 Direct Red 23 3441-14-3 5mg $54 2026-06-04 Buy
ChemScene CS-0010153 Direct Red 23 3441-14-3 10mg $87 2026-06-04 Buy
Chem-Impex 41953 Direct Red 23 ≥30%(Dyecontent) 3441-14-3 50G $83.42 2026-05-19 Buy
aablocks AA003PO3 3-((4-Acetamidophenyl)diazenyl)-4-hydroxy-7-(3-(5-hydroxy-6-(phenyldiazenyl)-7-sulfonaphthalen-2-yl)ureido)naphthalene-2-sulfonic acid, sodium salt Dyecontent30% 3441-14-3 1g $32 2026-05-28 Buy
Product number Packaging Price Buy
212490 50g $89.2 Buy
CS-0010153 5mg $54 Buy
CS-0010153 10mg $87 Buy
41953 50G $83.42 Buy
AA003PO3 1g $32 Buy

Direct Red 23 Chemical Properties,Uses,Production

Uses

Direct Red 23 has been used to stain water-hydrated seeds.

Preparation

aniline and N-(4-aminophenyl)acetamide diazo respectively, and N,N’-bis(4-hydroxy-2-sulfonaphthalene-7-yl)urea coupling.

Hazard

Low toxicity by ingestion.

Properties and Applications

red. Purple powder. Soluble in water for colourful red, solubility of 30 g/L (80 ° C), soluble in ethanol for orange, insoluble in acetone. The strong sulfuric acid was great red to product red, diluted light orange for palm. The dye solution to generate strong hydrochloric acid wine red precipitate; Add 10% sulfuric acid into a light blue; Add thick sodium hydroxide solution for red orange; Add 10% sodium carbonate (no change solution. Cellulose fiber of dyeing, dye devoured rate is very good, in the 80 ~ 100 ℃, affinity is the largest. Resistant to acid is very good. Copper ions in dyeing color shade darker; Iron ion in the same light. Mainly used in viscose etc of cellulose fiber dyeing, also can be used for silk, wool, paper and pulp dyeing, also can be used in the manufacture color which have pigment.

Standard Acid Resistance Alkali Resistance Light Fastness Soaping Water
Fading Stain Fading Stain
ISO 5 5 2-3 2 2
AATCC 5 5 2-3 4 2

Direct Red 23 Preparation Products And Raw materials

Raw materials

6,6'-Ureylene-bis(1-naphthol-3-sulfonic acid) 5,5'-Dihydroxy-2,2'-dinaphthylamine-7,7'-disulphonic acid Sodium chloride Water Sodium nitrite
4'-Aminoacetanilide 4-Aminoacetophenone 6,6'-Ureylene-bis(1-naphthol-3-sulfonic acid) Aniline 4'-Aminoacetanilide

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Preparation Products

Direct Red 23 Suppliers

Global( 202)Suppliers
Supplier Tel Email Country ProdList Advantage
SMAN Chemical Co., Ltd. 13928406992 517256716@qq.com China 886 58
Energy Chemical 400-0056266 sales8178@energy-chemical.com China 44850 61
Winchem Industrial Co. Ltd 0574-83851061 info@win-chemical.com China 500 55
Adamas Reagent, Ltd. 400-6009262 15618770481 yhx@titansci.com China 14098 59
Sichuan Kulinan Technology Co., Ltd 400-1166-196 18981987031 cdhxsj@163.com China 11674 57
Chengdu HuaXia Chemical Reagent Co. Ltd 400-1166-196 13458535857 cdhxsj@163.com China 13323 58
Alfa Chemistry 1-516-6625404 support@alfa-chemistry.com United States 9170 60
Shanghai YuanYe Biotechnology Co., Ltd. 15026964105 2881489226@qq.com China 89667 60
Shandong Xiya Chemical Co., Ltd. 4009903999 13395398332 sales@xiyashiji.com China 20788 60
Chengdu Huachun Technology Co., Ltd 400-1166-196 15982826727 cdhxsj@163.com China 14571 60
Supplier Advantage
SMAN Chemical Co., Ltd. 58
Energy Chemical 61
Winchem Industrial Co. Ltd 55
Adamas Reagent, Ltd. 59
Sichuan Kulinan Technology Co., Ltd 57
Chengdu HuaXia Chemical Reagent Co. Ltd 58
Alfa Chemistry 60
Shanghai YuanYe Biotechnology Co., Ltd. 60
Shandong Xiya Chemical Co., Ltd. 60
Chengdu Huachun Technology Co., Ltd 60

View Lastest Price from Direct Red 23 manufacturers

Image Update time Product Price Min. Order Purity Supply Ability Manufacturer
Direct Red 23 pictures 2026-09-11 Direct Red 23
3441-14-3
 25kg 1 20mt Winchem industrial co limited
Pigment and Dyestuff Chemical industry dye product pictures 2023-05-04 Pigment and Dyestuff Chemical industry dye product
3441-14-3
 $40.00-48.00 1KG 99% 200tons Guangzhou Sunton Biotechnology Co., Ltd.
Direct Bordeaux,Direct Red 23 pictures 2022-11-02 Direct Bordeaux,Direct Red 23
3441-14-3
 25kg 99% 20 tons TIANJIN XIANGRUI DYESTUFF CO.,LTD

Direct Red 23 Spectrum

Direct Red 23(3441-14-3)FT-IRDirect Red 23(3441-14-3)IR

3441-14-3(Direct Red 23)Related Search:

Direct Violet 9 DIRECT YELLOW 27 Direct Yellow 132 Direct Black 168 Amylose
CHLORANTINE FAST RED 5B DIRECT RED 80 Direct Yellow 12 Direct Blue 86 Direct Black 38
DIAMINE GREEN B DIRECT FAST BROWN M CI NO 22610 Direct Black 19 Direct Orange S
DIRECT BLUE 15 Direct Red 31 Stilbene yellow

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BENZO FAST SCARLET CI 29160 DIRECT FAST SCARLET 4BS DIRECT RED 23 Disodium 3-[(4-acetamidophenyl)azo]-4-hydroxy-7-[[[[5-hydroxy-6-(phenylazo)-7-sulphonato-2-naphthyl]amino]carbonyl]amino]naphthalene-2-sulphonate 2-naphthalenesulfonicacid,3-((4-(acetylamino)phenyl)azo)-4-hydroxy-7-((((5-hy 2-naphthalenesulfonicacid,3-[[4-(acetylamino)phenyl]azo]-4-hydroxy-7-[[[[5-hy airedalescarlet4bd aizenprimulascarlet4bsh amanilfastscarlet4bs benzanilfastscarlet4bsn benzofastscarlet4bs benzofastscarlet4bsa-cf benzoscarlet4bs C.I.Directred23 C.I.DirectRed23(29160) c.i.directred23,disodiumsalt chloraminefastscarlet4b ChloramineFastScar-let4BS,SE chloraminefastscarletse chlorazolfastscarlet4b chlorazolfastscarlet4bsp ChlorazolScarlet4B chromeleatherscarletse columbiafastscarlet4bs diacottonfastscarlet4bs diaminefastscarlet4ba diaminefastscarlet4bs diaphtaminefastscarlet4bs diazaminefastscarlet4bs diazolfastscarlet4bs diphenylfastscarlet4bs diphenylfastscarletrs directbrilliantred4a directfastscarlet4b directfastscarlet4bsn directfastscarletm4bs directfastscarletse directred23(c.i.29160) Directred4BS directscarletlightfast disodiumsa disodiumsal DitectFastBordeaux enianilfastscarlet4bs eriefastscarletscb fastred4bs fastscarlet4bsa fenaminfastscarlet4bs hispaminfastscarlet4bs kayakudirectfastscarlet4bs libiascarlet4bs mitsuidirectfastscarlet4bs nipponfastscarlet4bs nyanzafastscarlet4bsa orbaminscarlet4bs paperscarlet4bs paraminefastscarlet4bs