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Merck
CN

C204

Calmagite

metal indicator

Synonym(s):

1-(1-Hydroxy-4-methyl-2-phenylazo)-2-naphthol-4-sulfonic acid, 3-Hydroxy-4-(2-hydroxy-5-methylphenylazo)naphthalene-1-sulfonic acid

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About This Item

Linear Formula:
HOC10H5[N=NC6H3(OH)CH3]SO3H
CAS Number:
3147-14-6
Molecular Weight:
358.37
NACRES:
NA.83
PubChem Substance ID:
24892461
UNSPSC Code:
12352204
EC Number:
221-563-0
MDL number:
MFCD00011656
Beilstein/REAXYS Number:
708596

Key Documents

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Product Name

Calmagite, indicator grade

InChI key

VBRNLOQCBCPPHL-UHFFFAOYSA-N

InChI

1S/C17H14N2O5S/c1-10-6-7-14(20)13(8-10)18-19-17-12-5-3-2-4-11(12)16(9-15(17)21)25(22,23)24/h2-9,20-21H,1H3,(H,22,23,24)

SMILES string

Cc1ccc(O)c(c1)N=Nc2c(O)cc(c3ccccc23)S(O)(=O)=O

grade

indicator grade

form

powder and chunks

technique(s)

titration: suitable

mp

330 °C (lit.)

λmax

602 nm

Quality Level

200

Gene Information

human ... MPL(4352)

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Related Categories

Application

Used as an indicator in the titration of calcium or magnesium with EDTA.
Used for the determination of magnesium in biological materials.

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

WGK 3

flash_point_f

Not applicable

flash_point_c

Not applicable

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Certificates of Analysis (COA)

Lot/Batch Number
BCCN9012
BCCN3634
BCCM6984
BCCK2150
BCCJ1353

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R J Liedtke et al.
Clinical chemistry, 30(11), 1801-1804 (1984-11-01)
We describe an automated method for magnesium assay, for use with the Cobas-Bio centrifugal analyzer. Magnesium is reacted with calmagite, a dye, and the absorbance of the magnesium-dye complex at 520 nm is measured. EDTA is then added to break
Colorimetric measurement of serum magnesium with an IL micro centrifugal analyzer.
P Datta et al.
Clinica chimica acta; international journal of clinical chemistry, 151(1), 85-90 (1985-09-16)
Avoiding serum matrix effect in calmagite compleximetric measurements of magnesium.
N J Frandsen et al.
Clinical chemistry, 33(5), 719-719 (1987-05-01)
Tippu S Sheriff et al.
Dalton transactions (Cambridge, England : 2003), (44)(44), 5119-5122 (2007-11-07)
Hydrogen peroxide (H(2)O(2)) generated from the manganese(II) catalysed reduction of dioxygen has been shown to efficiently oxidize Calmagite (3-hydroxy-4-(2-hydroxy-5-methylphenylazo)naphthalene-1-sulfonic acid) in aqueous solution at pH 8.0 and 20 +/- 1 degrees C with de-protonated Tiron (1,2-dihydroxybenzene-3,5-disulfonate, disodium salt) acting as
Total Mg2+ measured in serum and urine in the Technicon RA 1000 random access analyzer by use of modified manual calmagite procedure.
E P Diamandis et al.
Clinical chemistry, 30(7), 1262-1262 (1984-07-01)
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