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O7252

Sigma-Aldrich

Orange G

certified by the Biological Stain Commission

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Synonym(s):
1-Phenylazo-2-naphthol-6,8-disulfonic acid disodium salt, 7-Hydroxy-8-phenylazo-1,3-naphthalenedisulfonic acid disodium salt, Acid Orange 10, Wool Orange 2G
Empirical Formula (Hill Notation):
C16H10N2Na2O7S2
CAS Number:
Molecular Weight:
452.37
Colour Index Number:
16230
Beilstein/REAXYS Number:
4120705
EC Number:
MDL number:
PubChem Substance ID:
NACRES:
NA.47

grade

certified by the Biological Stain Commission

Quality Level

form

powder

composition

Dye content, ≥80%

color

orange to very dark orange

solubility

water: 1 mg/mL, clear

application(s)

diagnostic assay manufacturing
hematology
histology

storage temp.

room temp

SMILES string

[Na+].[Na+].Oc1ccc2cc(cc(c2c1\N=N\c3ccccc3)S([O-])(=O)=O)S([O-])(=O)=O

InChI

1S/C16H12N2O7S2.2Na/c19-13-7-6-10-8-12(26(20,21)22)9-14(27(23,24)25)15(10)16(13)18-17-11-4-2-1-3-5-11;;/h1-9,19H,(H,20,21,22)(H,23,24,25);;/q;2*+1/p-2/b18-17+;;

InChI key

HSXUHWZMNJHFRV-QIKYXUGXSA-L

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1 of 4

This Item
861286O37561.15925
Orange G certified by the Biological Stain Commission

O7252

Orange G

Orange G certified by the Biological Stain Commission, Dye content 80 %

861286

Orange G

Orange G for NA electrophoresis

O3756

Orange G

Orange G (C.I. 16230) for microscopy Certistain®

1.15925

Orange G (C.I. 16230)

color

orange to very dark orange

color

-

color

-

color

-

form

powder

form

powder

form

powder

form

solid

application(s)

diagnostic assay manufacturing
hematology
histology

application(s)

diagnostic assay manufacturing
hematology
histology

application(s)

-

application(s)

diagnostic assay manufacturing
hematology
histology

solubility

water: 1 mg/mL, clear

solubility

H2O: 1 mg/mL

solubility

water: 1 mg/mL, clear, orange to red

solubility

70 g/L

storage temp.

room temp

storage temp.

room temp

storage temp.

room temp

storage temp.

2-30°C

General description

Orange G (C.l. 16230) is the disodium salt of benzeneazo-2-naphthol-6,8-disulfonic acid, C16H10N2O7S2Na2. Orange G, also known as wool orange 2G, is a component in several industry applications including cytology, histology, biology, and industrial staining. It is a component of Mallory′s connective tissue stain.

Application

Orange G is typically used as a background or cytoplasmic stain for various biological samples including a common application within clincial cytology within Papanicolaou varients.

Suitability

Certified for use in Mallory′s connective tissue stain; Wilson-Ezrin method for pituitary acidophils; Kreyberg′s method for keratin and mucus; as a counterstain following Heidenhain′s iron hematoxylin on paraffin sections; Flemming′s triple stain on paraffin sections of onion root.

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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Integrity of chromatin and replicating DNA in nuclei released from fission yeast by semi-automated grinding in liquid nitrogen.
Givens RM
BMC Research Notes, 4, 499-499 (2011)
A R Khataee et al.
Journal of hazardous materials, 168(1), 451-457 (2009-03-13)
In order to discuss the effect of chemical structure on photocatalysis efficiency, the photocatalytic degradation of three commercial textile dyes (C.I. Acid Orange 10 (AO10), C.I. Acid Orange 12 (AO12) and C.I. Acid Orange 8 (AO8)) with different structure and
G Thennarasu et al.
Environmental science and pollution research international, 19(7), 2755-2765 (2012-02-23)
The photocatalytic degradation of Orange G (OG) dye has been investigated using synthesised nanocrystalline ZnO as a photocatalyst and sunlight as the irradiation source. The formation of ZnO prepared from its precursor was confirmed through FT-IR and powder X-ray diffraction
Honghai Wu et al.
Environmental technology, 33(13-15), 1545-1552 (2012-09-20)
Decolourization of the azo dye Orange G (OG) was investigated by using goethite/H2O2 as a heterogeneous Fenton-like reagent. Five principle operational parameters, namely pH, ion strength, concentrations ofgoethite (alpha-FeOOH) and hydrogen peroxide (H2O2), and reaction temperature, were taken into account
Wei Wang et al.
Science (New York, N.Y.), 369(6508) (2020-09-05)
Vertebrates vary in their ability to regenerate, and the genetic mechanisms underlying such disparity remain elusive. Comparative epigenomic profiling and single-cell sequencing of two related teleost fish uncovered species-specific and evolutionarily conserved genomic responses to regeneration. The conserved response revealed

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