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195251

Sigma-Aldrich

Direct Red 81

Dye content 50 %

Synonym(s):

DR 81, Disodium 7-benzamido-4-hydroxy-3-[[4-[(4-sulphonatophenyl)azo]phenyl]azo]naphthalene-2-sulphonate

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$43.74
100 G
$120.00

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25 G
$43.74
100 G
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About This Item

Empirical Formula (Hill Notation):
C29H19N5Na2O8S2
CAS Number:
2610-11-9
Molecular Weight:
675.60
Colour Index Number:
28160
EC Number:
220-028-9
MDL number:
MFCD00003949
UNSPSC Code:
12171500
PubChem Substance ID:
24851682
NACRES:
NA.47

$43.74

List Price$47.60Save 8%

Available to ship onMarch 31, 2025Details

Request a Bulk Order

form

powder

Quality Level

100

composition

Dye content, 50%

technique(s)

microbe id | staining: suitable

mp

240 °C (dec.) (lit.)

solubility

H2O: 0.1%, dark red

λmax

397 nm
508 nm (2nd)

ε (extinction coefficient)

≥12000 at 272-278 nm in H2O at 0.01 g/L

application(s)

diagnostic assay manufacturing
hematology
histology

storage temp.

room temp

SMILES string

[Na+].[Na+].Oc1c(N=Nc2ccc(cc2)N=Nc3ccc(cc3)S([O-])(=O)=O)c(cc4cc(NC(=O)c5ccccc5)ccc14)S([O-])(=O)=O

InChI

1S/C29H21N5O8S2.2Na/c35-28-25-15-12-23(30-29(36)18-4-2-1-3-5-18)16-19(25)17-26(44(40,41)42)27(28)34-33-21-8-6-20(7-9-21)31-32-22-10-13-24(14-11-22)43(37,38)39;;/h1-17,35H,(H,30,36)(H,37,38,39)(H,40,41,42);;/q;2*+1/p-2

InChI key

UFUQRRYHIHJMPB-UHFFFAOYSA-L

Related Categories

Biochem/physiol Actions

Bacterial consortium NBNJ6 has an ability to decolorize direct red 81 (DR81).[1]

Storage Class

11 - Combustible Solids

wgk_germany

WGK 3

flash_point_f

Not applicable

flash_point_c

Not applicable

ppe

Eyeshields, Gloves, type N95 (US)

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Certificates of Analysis (COA)

Lot/Batch Number
SHBR6740
SHBQ5471
SHBQ1961
SHBN3053
SHBM8407

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R Schräpler et al.
Acta histochemica, 89(2), 237-244 (1990-01-01)
It is known that the birefringency of the collagen fibres is selectively enhanced by staining with Sirius Red. According to experiences, the most authors usually take Sirius Red F3BA as dye. We use the disazo dyestuff Solaminrot 4B produced by
D P Berry et al.
Plastic and reconstructive surgery, 102(1), 124-131 (1998-07-09)
The closure of ungrafted sacrococcygeal pilonidal sinus excisional wounds was studied in 15 patients. Wound punch biopsies were taken on a regular basis, and histologic sections were made. To document changes, computer-assisted morphometric image analysis was employed. Initial average wound
Dianne M Walters et al.
Current protocols in pharmacology, Chapter 5, Unit 5-Unit 5 (2008-03-01)
Pulmonary fibrosis is a component of many interstitial lung diseases, including idiopathic pulmonary fibrosis, a chronic, progressive disease for which there is currently no effective therapy. Bleomycin has been widely used in rodents to model pulmonary fibrosis for the study
Gavin J Murphy et al.
Transplant international : official journal of the European Society for Organ Transplantation, 16(5), 347-353 (2003-05-22)
Chronic allograft dysfunction, the leading cause of solid-organ transplant failure, is characterised by histological evidence of extracellular matrix (ECM) accumulation (fibrosis). The aim of this study was to compare the effect of combined rapamycin and cyclosporine therapy on fibrosis-associated gene
L F Quintanilha et al.
Cell transplantation, 17(8), 943-953 (2008-12-17)
We tested the effect of bone marrow cell (BMC) transplantation in either preventing or reversing cirrhosis on an experimental model of chronic liver disease. Female Wistar rats were fed a liquid alcohol diet and received intraperitoneal injections of carbon tetrachloride
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