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398187

Xylenol Orange tetrasodium salt

ACS reagent

Synonym(s):

3,3′-Bis[N,N-bis(carboxymethyl)aminomethyl]-o-cresolsulfonephthalein tetrasodium salt

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About This Item

Empirical Formula (Hill Notation):
C31H28N2Na4O13S
CAS Number:
3618-43-7
Molecular Weight:
760.58
NACRES:
NA.47
PubChem Substance ID:
24864725
UNSPSC Code:
12171500
EC Number:
222-805-8
MDL number:
MFCD00044293
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grade

ACS reagent

Quality Segment

form

powder or crystals

technique(s)

titration: suitable

color

very dark brown to very dark red

mp

195 °C (dec.) (lit.)

λmax

580 nm

application(s)

diagnostic assay manufacturing
hematology
histology

storage temp.

room temp

SMILES string

[Na+].[Na+].[Na+].[Na+].Cc1cc(cc(CN(CC([O-])=O)CC([O-])=O)c1O)C2(OS(=O)(=O)c3ccccc23)c4cc(C)c(O)c(CN(CC([O-])=O)CC([O-])=O)c4

InChI

1S/C31H32N2O13S.4Na/c1-17-7-21(9-19(29(17)42)11-32(13-25(34)35)14-26(36)37)31(23-5-3-4-6-24(23)47(44,45)46-31)22-8-18(2)30(43)20(10-22)12-33(15-27(38)39)16-28(40)41;;;;/h3-10,42-43H,11-16H2,1-2H3,(H,34,35)(H,36,37)(H,38,39)(H,40,41);;;;/q;4*+1/p-4

InChI key

YIIQUYHVWRJXEM-UHFFFAOYSA-J

General description

Xylenol Orange tetrasodium salt is a fluorochrome acid dye with complexing and chelating properties that make it useful as an indicator in the spectrophotometric detection and assay of metal ions such as calcium, cadmium, bismuth, zinc, lead, and mercury. Its tetrasodium salt especially is used as an indicator in metal titrations. It changes color from yellow to red between pH 6.4 to 10.4. It has six potentially anionic substituents, one being sulfonate, and is anionic under staining conditions and during most laboratory applications.

Application

  • Xylenol Orange has been used as a vital stain to study calcification in bone development, injury, and repair.
  • It has been used in the fluorescent histochemical detection of alkaline phosphatase.
  • It has been used in FBX (ferrous benzoic xylenol orange) gel preparation to study the effects of MRI (magnetic resonance imaging) parameters on image quality.

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Storage Class

11 - Combustible Solids

WGK

WGK 3

Flash Point (°F)

Not applicable

Flash Point (°C)

Not applicable

PPE (personal protective equipment)

Eyeshields, Gloves, type N95 (US)

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