Chromotrope 2B

SIAL/27130 - for microscopy

Synonym: 2-(4-Nitrophenylazo)chromotropic acid disodium salt; Acid Red 176

CAS Number: 548-80-1
Empirical Formula (Hill Notation): C₁₆H₉N₃Na₂O₁₀S₂
Molecular Weight: 513.37
EC Number: 208-959-9
MDL Number: MFCD00003951
Linear Formula: C₁₆H₉N₃Na₂O₁₀S₂
Product Type: Chemical

Catalog Number	PKG Qty.	Price


45-27130-10G	10 g	$32.20 1/EA	Add To Favorites

Properties
Descriptions
Safety Info.
Basic Data

ε (extinction coefficient)	≥500 at 509-519 nm in water
application(s)	diagnostic assay manufacturing hematology histology
form	powder or crystals
grade	for microscopy
InChI	1S/C16H11N3O10S2.2Na/c20-12-7-11(30(24,25)26)5-8-6-13(31(27,28)29)15(16(21)14(8)12)18-17-9-1-3-10(4-2-9)19(22)23;;/h1-7,20-21H,(H,24,25,26)(H,27,28,29);;/q;2*+1/p-2/b18-17+;;
InChI key	AXUUHWJXDWBCSG-QIKYXUGXSA-L
mp	300 °C
Quality Level	100
SMILES string	[Na+].[Na+].Oc1cc(cc2cc(c(N=Nc3ccc(cc3)[N+]([O-])=O)c(O)c12)S([O-])(=O)=O)S([O-])(=O)=O
solubility	water: 10 mg/mL
storage temp.	room temp

Application:

Chromotrope 2B along with Chromotrope 2R, was used to give a highly colored radical anion, during the spectrophotometric determination of cephalosporins (cephadroxil (I), cephalexin (II) and cephradine (III)) in pharmaceutical products. It may be immobilized on AG 1-X8 ion exchange resin, used in flame atomic absorption spectrometry and inductively coupled plasma mass spectrometry (ICP-MS), done for the on-line preconcentration and determination of aluminium.

Hazard Codes	Xi
Risk Statements	36/37/38
Safety Statements	26-36
RIDADR	NONH for all modes of transport
WGK Germany	WGK 3
Flash Point(F)	Not applicable
Flash Point(C)	Not applicable

mp	300 °C
Storage Temp.	room temp
Colour Index Number	16575
UNSPSC	12171500

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