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126225

Sigma-Aldrich

Chromotropic acid disodium salt dihydrate

technical grade

Synonym(s):

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

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About This Item

Linear Formula:
(HO)2C10H4(SO3Na)2·2H2O
CAS Number:
5808-22-0
Molecular Weight:
400.29
EC Number:
204-972-9
MDL number:
MFCD00150612
UNSPSC Code:
12352100
PubChem Substance ID:
329749776
NACRES:
NA.21

grade

technical grade

Quality Level

200

assay

≥78.5%

form

powder

mp

>300 °C (lit.)

functional group

sulfonic acid

SMILES string

O.O.[Na+].[Na+].Oc1cc(cc2cc(cc(O)c12)S([O-])(=O)=O)S([O-])(=O)=O

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);;;2*1H2/q;2*+1;;/p-2

InChI key

QUEAKWJKJBFNEG-UHFFFAOYSA-L

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General description

Chromotropic acid disodium salt dihydrate is a tan colored sodium salt.

Application

Chromotropic acid disodium salt dihydrate may be employed as a chromogenic reagent for the quantification of dipyrone in various pharmaceutical preparations.

pictograms

Exclamation mark
GHS07

signalword

Warning

Hazard Classifications

Eye Irrit. 2 - Skin Irrit. 2 - STOT SE 3

target_organs

Respiratory system

Storage Class

11 - Combustible Solids

wgk_germany

WGK 3

flash_point_f

Not applicable

flash_point_c

Not applicable

ppe

dust mask type N95 (US), Eyeshields, Gloves

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Certificates of Analysis (COA)

Lot/Batch Number
0000363149
0000363149
0000254824
MKCM9346
MKCM1799

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"Spectrophotometric determination of dipyrone in pharmaceutical preparations by using chromotropic acid"
Sakiara KA, et al.
Il Farmaco; Edizione Scientifica, 54(09), 629-635 (1999)
Spot-test identification and rapid quantitative sequential analysis of dipyrone.
Tubino M, et al.
Ecletica Quimica , 35(10), 41-46 (2010)
Rapid Spot Test Analysis for the Detection of Dipyrone in Pharmaceutical Preparations.
Pezza L, et al.
Analytical Sciences, 16(3), 313-315 (2000)

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