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DIRECT RED 80

DIRECT RED 80 structure

CAS No.: 2610-10-8

Chemical Name:: DIRECT RED 80

Synonyms: CI 35780;SIRIUS RED;CI NO 35780;Fast Red BA;DIRECT RED 80;Duaazol Red B;picrosiriusred;Direct Red F3B;SIRIUS RED F3B;Sirius Rosa BB

CBNumber:: CB3126376

Molecular Formula:: C45H33N10NaO21S6

Molecular Weight:: 1265.16

MDL Number:: MFCD00054389

MOL File:: 2610-10-8.mol

MSDS File:: SDS

TDS File:: TDS

Last updated:2026-04-22 18:57:36

Product description	Number	Pack Size	Price
Direct Red 80 Dye content 25%	365548	5g	$50.3
Direct Red 80 Dye content 25%	365548	25g	$161
Direct Red 80 [for Biochemical Research]	D4132	5G	$33
Direct Red 80	D3273	25g	$61
Direct Red 80	39535	5g	$28

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DIRECT RED 80 Properties

Density	1.625[at 20℃]
vapor pressure	0Pa at 25℃
storage temp.	room temp
solubility	DMF: Slightly Soluble DMSO: Slightly SolublePBS (pH 7.2): 10 mg/ml
pka	pK1-6 < 2; pK7.8 >13(at 25℃)
form	powder
Colour Index	35780
color	Dark green to Dark red to Black
Water Solubility	Partly soluble in water, very slightly soluble in ethanol, and cellosolve. Insoluble in many organic solvents.
ε(extinction coefficient)	≥12000 at 277-283nm in H2O ≥15000 at 223-235nm in H2O ≥32000 at 524-530nm in H2O
λmax	528 nm
Merck	14,8548
BRN	8185575
Major Application	diagnostic assay manufacturing hematology histology
Cosmetics Ingredients Functions	HAIR DYEING
InChIKey	YIQKLZYTHXTDDT-IJPLDVMMSA-H
LogP	-2.82 at 20℃
CAS DataBase Reference	2610-10-8
EWG's Food Scores	1-4
FDA UNII	1294D5G72N
EPA Substance Registry System	C.I. Direct Red 80, hexasodium salt (2610-10-8)
UNSPSC Code	12171500
NACRES	NA.47

SAFETY

Risk and Safety Statements

Hazard statements

H412

Precautionary statements

P273-P501

PPE

Eyeshields, Gloves, type N95 (US)

Safety Statements

22-24/25

WGK Germany

TSCA

TSCA listed

HS Code

2927.00.3000

Storage Class

11 - Combustible Solids

NFPA 704

	1
0		0

DIRECT RED 80 price More Price(23)

Manufacturer	Product number	Product description	CAS number	Packaging	Price	Updated	Buy
Sigma-Aldrich	365548	Direct Red 80 Dye content 25%	2610-10-8	5g	$50.3	2026-04-30	Buy
Sigma-Aldrich	365548	Direct Red 80 Dye content 25%	2610-10-8	25g	$161	2026-04-30	Buy
TCI Chemical	D4132	Direct Red 80 [for Biochemical Research]	2610-10-8	5G	$33	2026-04-30	Buy
TCI Chemical	D3273	Direct Red 80	2610-10-8	25g	$61	2026-04-30	Buy
Cayman Chemical	39535	Direct Red 80	2610-10-8	5g	$28	2026-04-30	Buy

Product number	Packaging	Price	Buy
365548	5g	$50.3	Buy
365548	25g	$161	Buy
D4132	5G	$33	Buy
D3273	25g	$61	Buy
39535	5g	$28	Buy

DIRECT RED 80 Chemical Properties,Uses,Production

Chemical Properties

Reddish brown powder. Soluble in water, solubility in water (60℃) 30g/L. Aqueous solution is bluish red to magenta, adding concentrated hydrochloric acid produces purple precipitate; adding concentrated sodium hydroxide solution is magenta purple. Difficult to dissolve in ethanol, ethylene glycol ether, insoluble in other organic solvents. Blue in concentrated sulfuric acid, bluish red to purple after dilution. Blue in concentrated nitric acid.

Uses

Stain for connective tissue. Dye for cellulose fibers.

Uses

Direct red 80 is a dye useful as a cardiac muscle stain and as a model compound in adsorption studies. It has also been utilized to compare efficacy of textile dye removal in aqueous solutions.

Definition

ChEBI: An organic sodium salt resulting from the formal condensation of Sirius red F3B (acid form) with six equivalents of sodium hydroxide. A polyazo dye used principally in staining methods for collagen and amyloid.

Flammability and Explosibility

Non flammable

Properties and Applications

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

References

[1] L. C. U. JUNQUEIRA R. R B G Bignolas. Picrosirius staining plus polarization microscopy, a specific method for collagen detection in tissue sections[J]. Journal of Molecular Histology, 1979, 11 4: 447-455. DOI: 10.1007/bf01002772
[2] R W DAPSON. Certification procedures for sirius red F3B (CI 35780, Direct red 80).[J]. Biotechnic & Histochemistry, 2011, 86 3: 133-139. DOI: 10.3109/10520295.2011.570277

DIRECT RED 80 Preparation Products And Raw materials

Raw materials

Aniline-2-sulfonic acid Sulfanilic acid 6,6'-Ureylene-bis(1-naphthol-3-sulfonic acid) J acid

Preparation Products

DIRECT RED 80 Suppliers

Global( 224)Suppliers

Supplier	Tel	Email	Country	ProdList	Advantage
Hubei Lidu New Material Technology Co., Ltd	+86-19307248857 +86-19307248857	19307248857@163.com	China	888	58
CONIER CHEM AND PHARMA LIMITED	+8618523575427	sales@conier.com	China	49977	58
TargetMol Chemicals Inc.	+1-781-999-5354; +17819995354	marketing@targetmol.com	United States	32467	58
Hefei TNJ Chemical Industry Co.,Ltd.	+86-0551-65418671 +8618949823763	sales@tnjchem.com	China	34563	58
Dideu Industries Group Limited	+86-29-89586680 +86-15129568250	1026@dideu.com	China	18895	58
Nanjing Duly Biotech Co.,Ltd	+undefined18013301590	doris@njduly.com	China	2448	58
TargetMol Chemicals Inc.	+1-781-999-5354;	support@targetmol.com	United States	39040	58
HANGZHOU LEAP CHEM CO., LTD.	+86-571-87711850	market18@leapchem.com	China	43333	58
Aladdin Scientific		tp@aladdinsci.com	United States	57505	58
Watson Biotechnology Co.,Ltd	+86-18186686046 +86-18186686046;	sales01@watsonbiotech.cn	China	5735	58

Supplier	Advantage
Hubei Lidu New Material Technology Co., Ltd	58
CONIER CHEM AND PHARMA LIMITED	58
TargetMol Chemicals Inc.	58
Hefei TNJ Chemical Industry Co.,Ltd.	58
Dideu Industries Group Limited	58
Nanjing Duly Biotech Co.,Ltd	58
TargetMol Chemicals Inc.	58
HANGZHOU LEAP CHEM CO., LTD.	58
Aladdin Scientific	58
Watson Biotechnology Co.,Ltd	58

View Lastest Price from DIRECT RED 80 manufacturers

Image	Update time	Product	Price	Min. Order	Purity	Supply Ability	Manufacturer
	2026-04-22	Direct Red 80 2610-10-8	US $40.00 / g		AR	10g	TargetMol Chemicals Inc.
	2026-04-22	DIRECT RED 80 2610-10-8	US $0.00-0.00 / g	10g	99%	20tons	Hubei Lidu New Material Technology Co., Ltd

Direct Red 80
2610-10-8
US $40.00 / g
AR
TargetMol Chemicals Inc.

DIRECT RED 80
2610-10-8
US $0.00-0.00 / g
99%
Hubei Lidu New Material Technology Co., Ltd

DIRECT RED 80 Spectrum

DIRECT RED 80(2610-10-8)¹HNMR DIRECT RED 80(2610-10-8)IR

2610-10-8(DIRECT RED 80)Related Search:

Direct Black 19 Direct Black 38 FAST RED RC SALT Fuchsin Acid Congo Red

Methyl Red Phenol Red sodium salt CI 37085 CHLORANTINE FAST RED 5B Direct Red 23

Direct Yellow 12 Direct Blue 86 DIRECT SCARLET B CHLORAZOL BLACK BH CHICAGO SKY BLUE 6B

DIRECT FAST BROWN M CHLORAZOL VIOLET N DIRECT PURE YELLOW 5G

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CI 35780 CI NO 35780 DIRECT RED 80 Fast Red BA Ambidirect Red 3BL Anadurm Red D-BA Best Direct Supra Red F3B Covalene Brilliant Red F3B Deriet Fast Red BA Derma Red BA 150 Sirius Supra Red F3B Tertrodirect Light Red F3B Triamin Red F3B Vicorect Red SK. picrosiriusred 2-Naphthalenesulfonic acid, 7,7-(carbonyldiimino)bis4-hydroxy-3-2-sulfo-4-(4-sulfophenyl)azophenylazo-, hexasodium salt Amanil Fast Red 8BLN C.I.Direct Red 80(35780) Diazol Light Red 3B Duaazol Red B Solar Brilliant Red BA Sumilight Red F3B hexasodium 7,7'-(carbonyldiimino)bis[4-hydroxy-3-[[2-sulphonato-4-[(4-sulphonatophenyl)azo]phenyl]azo]naphthalene-2-sulphonate] Direct Red 5BLL Direct Red F3B Direct Red 80, AR 2-Naphthalenesulfonicacid,7,7'-(carbonyldiimino)bis[4-hydroxy-3-[2-[2-sulfo-4-[2-(4-sulfophenyl)diazenyl]phenyl]diazenyl]-,sodium salt (1:6) 4,4'-[Carbonylbis[imino[1-hydroxy-3-(sodiooxysulfonyl)naphthalene-6,2-diyl]azo[3-(sodiooxysulfonyl)-4,1-phenylene]azo]]bis(benzenesulfonic acid sodium) salt 7,7'-Ureylenebis[4-hydroxy-3-[[2-sodiosulfo-4-[(4-sodiosulfophenyl)azo]phenyl]azo]naphthalene-2-sulfonic acid sodium] salt SIRIUS RED SIRIUS RED F3B SIRIUS RED F3BA SIRIUS RED F3BA SOLUTION 2-naphthalenesulfonicacid,7,7’-(carbonyldiimino)bis[4-hydroxy-3-[[2-sulfo-4-[ 2-Naphthalenesulfonicacid,7,7’-(carbonyldiimino)bis[4-hydroxy-3-[2-sulfo-4-[(4-sulfophenyl)azo]phenyl]azo]-,hexasodiumsalt Direct Red 80 [for Biochemical Research] Sirius Rosa BB Direct Research DIRECT RED 80 ISO 9001：2015 REACH C.I.Direct Red 80:C.I.35780 Sirius scarlet / direct red 80 Sirius Red Stain Kit Hexasodium 4-hydroxy-7-(3-(5-hydroxy-7-sulfonato-6-((2-sulfonato-4-((4-sulfonatophenyl)diazenyl)phenyl)diazenyl)naphthalen-2-yl)ureido)-3-((2-sulfonato-4-((4-sulfonatophenyl)diazenyl)phenyl)diazenyl)naphthalene-2-sulfonate Direct Red 80【365548】 Dye content 25 % 2610-10-8 C45H26N10O21S66Na C45H32N10P21S6Na6 C45H32N10O21S6 C45H26N10Na6O21S6 C45H32N10O21S66Na Organics