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C204

Supelco

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
Beilstein:
708596
EC Number:
221-563-0
MDL number:
MFCD00011656
UNSPSC Code:
12352204
PubChem Substance ID:
24892461
NACRES:
NA.83

product name

Calmagite, indicator grade

grade

indicator grade

form

powder and chunks

technique(s)

titration: suitable

mp

330 °C (lit.)

λmax

602 nm

SMILES string

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

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)

InChI key

VBRNLOQCBCPPHL-UHFFFAOYSA-N

Gene Information

human ... MPL(4352)

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Application

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

Pictograms

Exclamation mark
GHS07

Signal Word

Warning

Hazard Statements

H315,H319,H335

Hazard Classifications

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

Target Organs

Respiratory system

Storage Class Code

11 - Combustible Solids

WGK

WGK 3

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Certificates of Analysis (COA)

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Rapid measurement of serum magnesium with a kit.
P West
Clinical chemistry, 30(8), 1426-1427 (1984-08-01)
M H Abernethy et al.
Clinical chemistry, 28(3), 520-522 (1982-03-01)
Magnesium in plasma is determined by diluting a 50-microL sample with 5.0 mL of stable calmagite reagent containing the amphoteric detergent Empigen BB, and buffered with 2-amino-2-methyl-1-propanol at pH 11.5. The calcium response is masked with strontium-buffered [ethylene-bis(oxyethylenenitrilo)]tetraacetate (EGTA), while
Laboratory Medicine, 12, 139-139 (1989)
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
T Fujita et al.
Clinical chemistry, 41(9), 1302-1305 (1995-09-01)
We report a method for assaying magnesium in serum and urine involving only one enzyme, isocitrate dehydrogenase (NADP+)(EC 1.1.1.42), which requires magnesium ion for activity. The enzymatic reduction of NADP+ by isocitrate increases in rate linearly up to at least
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