Chromotropic acid disodium salt dihydrate

SIAL/27150 - puriss. p.a., ACS reagent, for the detection of Ag, ClO₃^-, Cr, Hg, NO₂^-, NO₃^2-, Ti, ≥98.0%

Synonym: 1,8-Dihydroxynaphthalene-3,6-disulfonic acid disodium salt; 4,5-Dihydroxynaphthalene-2,7-disulfonic acid disodium salt

CAS Number: 5808-22-0
Empirical Formula (Hill Notation): C₁₀H₆Na₂O₈S₂ · 2H₂O
Molecular Weight: 400.29
EC Number: 204-972-9
MDL Number: MFCD00150612
Linear Formula: (HO)₂C₁₀H₄(SO₃Na)₂·2H₂O
Product Type: Chemical

Catalog Number	PKG Qty.	Price


45-27150-10G-F	10 g	$179.00 1/EA	Add To Favorites
45-27150-50G-F	50 g	$406.00 1/EA	Add To Favorites
45-27150-250G-F	250 g	$1290.00 1/EA	Add To Favorites

Properties
Descriptions
Safety Info.
Basic Data

assay	≥98.0%
color	off-white
form	powder
grade	ACS reagent
	puriss. p.a.
impurities	8-10% water
InChI	1S/C10H8O8S2.2Na.2H2O/c11-8-3-6(19(13,14)15)1-5-2-7(20(16,17)18)4-9(12)10(5)8;;;;/h1-4,11-12H,(H,13,14,15)(H,16,17,18);;;21H2/q;2+1;;/p-2
InChI key	QUEAKWJKJBFNEG-UHFFFAOYSA-L
mp	>300 °C (lit.)
quality	for the detection of Ag, ClO₃^-, Cr, Hg, NO₂^-, NO₃^2-, Ti
Quality Level	200
SMILES string	O.O.[Na+].[Na+].Oc1cc(cc2cc(cc(O)c12)S([O-])(=O)=O)S([O-])(=O)=O
technique(s)	UV/Vis spectroscopy: suitable

Application:	Chromotropic acid disodium salt dihydrate may be employed as a chromogenic reagent in the following studies: • Quantification of dipyrone in various pharmaceutical preparations. • Highly sensitive method for rapid determination of beryllium by a fluorimetric method.
General description:	Chromotropic acid disodium salt dihydrate is a useful analytical reagent widely used in analytical chemistry for fluorometric determinations.

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

Purity	≥98.0%
mp	>300 °C (lit.)
UNSPSC	12352100

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